JP2013146873A - Heat generation restriction controller and heat generation restriction control method in electronic equipment, and the electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat generation restriction controller and a heat generation restriction control method in electronic equipment which are capable of appropriately performing heat generation restriction control for a power supply and an actuator by setting appropriate pause time for the power supply and the actuator, and to provide the electronic equipment.SOLUTION: On the basis of respective current values recognized from duty ratios of PWM signals output to control respective motors, heat generation temperatures of the respective motors are calculated, and further the pause time corresponding to each of the heat generation temperatures is calculated (S1 to S8). On the basis of the current value of a power supply device being the sum total of the respective current values of the respective motors, a recording head, a display device and a sensor, the heat generation temperature of the power supply device is calculated, and further the pause time corresponding to the heat generation temperature is calculated (S11 to S18). The longest pause time of all of the pause time is set before a carriage motor is driven (S19).

Description

  The present invention relates to a heat generation restriction control device, a heat generation restriction control method, and an electronic device in an electronic device that performs control for limiting heat generation between an actuator and a power source in an electronic device including an actuator such as an electric motor and a power source.

  For example, Patent Document 1 discloses a technique for limiting heat generation of a power supply device and an electric motor in a printer. In this printer, each heat storage amount of an electric motor such as a carriage motor and a paper feed motor and a heat storage amount of a power supply device are obtained. Then, the heat storage level according to the heat storage amount of the electric motor and the heat storage level according to the heat storage amount of the power supply device are obtained, the respective heat storage levels are compared, the highest heat storage level is specified, and according to the specified maximum heat storage level. Set the pause time. Then, after elapse of a pause time corresponding to the maximum heat storage level, control of a predetermined printing operation is started. For this reason, it is possible to secure sufficient downtime required for the power supply device and each motor, and to avoid leaving the power supply device and each motor in an overheated state exceeding their respective limit temperatures.

JP 2008-30217 A

  By the way, in the printer described in Patent Document 1, selection of the maximum heat storage level does not necessarily select the longest pause time, and there is a problem that the effect of heat generation restriction control is not sufficient. That is, the individual limit temperatures (standard temperatures) of the motors and the power supply devices are different. And each heat storage level is decided on the basis of each limit temperature. In addition, when the heat generation restriction control that puts a pause is started because the heat storage level is high, the individual heat dissipation characteristics of each motor and power supply device are different, so the pause time required to lower the temperature below the limit temperature at a predetermined speed However, it differs between each motor and power supply. For this reason, the required rest time is different between each motor and the power supply device even at the same heat storage level.

  And since the printer of patent document 1 was the structure which compares the thermal storage level determined from each thermal storage amount between each motor and power supply device from which a limit temperature and a thermal radiation characteristic differ as mentioned above, it is the maximum thermal storage level. Although the corresponding downtime can be expected to be effective for limiting the heat generation of the heat source corresponding to the highest heat storage level, it is not always an appropriate downtime for the heat generation limitation for other heat sources. For this reason, after that, the set pause time is short for other heat sources, and after that, when the temperature gradually increases, the heat storage level becomes higher, and the heat storage level reaches the maximum heat storage level, an appropriate pause is made. There was a risk that time would be set.

  The present invention has been made in view of the above problems, and one of its purposes is an electronic device capable of appropriately performing heat generation restriction control of the power source and the actuator by setting an appropriate pause time for the power source and the actuator. An object is to provide a heat generation restriction control device, a heat generation restriction control method, and an electronic device in an apparatus.

  In order to achieve one of the above objects, one aspect of the present invention is an electronic device that restricts heat generation between a power source and at least one of the one or more actuators provided in the electronic device. A heat generation restriction control device, comprising: a first heat storage calculation unit that calculates first heat storage information related to a heat storage amount of the actuator based on a current value of the actuator subject to heat generation restriction; and a current value of the power source A second heat storage calculation unit that calculates second heat storage information related to the heat storage amount of the power source; a first pause time calculation unit that calculates a first pause time based on the first heat storage information; A second downtime calculation unit that calculates a second downtime based on the heat storage information of 2 and the longest of the first downtime and the second downtime is set as the downtime Configuration When, the gist, further comprising a control unit for controlling so as to put the pause time pause in between driving at least one of said actuators.

  According to the above configuration, the first downtime is calculated based on the first heat storage information calculated based on the current value of the actuator to be limited in heat generation, and the first time calculated based on the current value of the power source. Based on the second heat storage information, the second downtime is calculated. Then, the longest of the first pause time and the second pause time is set as the pause time. At least one actuator is controlled by the control unit so as to put a pause of a set pause time between driving. Thus, when determining the rest time, the first rest time and the second rest time are compared and the longest one is set, so that an appropriate rest time can be set. For example, when comparing heat storage levels, the pause time corresponding to the highest heat storage level is not necessarily the longest, and if the longest pause time is not selected, appropriate heat generation restriction control is not performed. However, in one of the aspects of the present invention, since the rest time is compared, the longest suitable rest time can be set. Therefore, it is possible to appropriately control the heat generation restriction of the power source and the actuator by setting appropriate rest time for the power source and the actuator.

  In the heat generation restriction control device according to one aspect of the present invention, the first determination unit that determines whether or not the first heat storage information exceeds a first threshold value, and the second heat storage information is the first heat storage information. A second determination unit that determines whether or not a threshold value of 2 is exceeded, and the control unit determines that the heat storage information has exceeded a corresponding threshold value by at least one of the determination units. In this case, it is preferable to control at least one of the actuators so that the pause of the pause time set by the setting unit is inserted between driving.

  According to the above configuration, when at least one of the determination units determines that the heat storage information has exceeded the corresponding threshold value, at least one actuator performs a pause of the pause time set by the setting unit between driving periods. Controlled to enter. Therefore, since the heat generation restriction control is not started until the heat storage information exceeds the corresponding threshold value, unnecessary pause can be avoided.

  In the heat generation restriction control device according to one aspect of the present invention, the second heat storage calculation unit includes the second heat storage information based on a current flowing through at least one load including the actuator that is a power supply destination of the power source. Is preferably calculated.

  According to the above configuration, the second heat storage information related to the heat storage amount of the power source is calculated based on the current flowing through at least one load including the actuator that is the power supply destination of the power source. This eliminates the need for a sensor that detects the power supply current or the power supply temperature.

  In the heat generation restriction control device according to one aspect of the present invention, the electronic device includes a non-powered load including at least one of a display device and a sensor as a power supply destination of the power source, and the second heat storage It is preferable that the current used when the calculation unit calculates the second heat storage information includes a current flowing through the load of the non-power system.

  According to the above configuration, the current used when the second heat storage calculation unit calculates the second heat storage information includes the current flowing through the load of the non-power system, so that the current value of the power source can be set relatively accurately. Can be calculated. For this reason, it is possible to avoid as much as possible the inconvenience that the unnecessary heat generation restriction control is started or the start of the necessary heat restriction control is delayed due to the low accuracy of the heat storage information of the power source.

  In the heat generation restriction control device according to one aspect of the present invention, when the operation of the actuator and the operation of the operation unit have not been performed for a predetermined time or more, the power output from the power source is stopped or the power in the normal mode Further comprising a mode management unit that manages a power consumption mode including a power saving mode that reduces the power consumption mode and the normal mode, and the second heat storage calculation unit is configured to control a load of the non-power system based on the power consumption mode. It is preferable to calculate the current value.

  According to the above configuration, since the current value of the non-powered load is calculated based on the power consumption mode (for example, the normal mode or the power saving mode), the current value of the power source can be calculated with relatively high accuracy. For example, when the power consumption mode is the power saving mode, the current value of the non-powered load is calculated as a relatively smaller value than in the normal mode. For this reason, it is possible to avoid as much as possible the inconvenience that the unnecessary heat generation restriction control is started or the start of the necessary heat restriction control is delayed due to the low accuracy of the heat storage information of the power source.

  In the heat generation restriction control device according to one aspect of the present invention, at least one of the first downtime calculation unit and the second downtime calculation unit has a larger difference between the heat storage information and the threshold value. It is preferable to calculate the pause time so as to be longer.

  According to the above configuration, at least one of the first pause time and the second pause time is calculated to be longer as the difference between the heat storage information and the threshold value is larger, so the heat generation restriction control is started. Later, it is possible to avoid the power supply and the actuator relatively quickly from a relatively overheated state in which the threshold value is exceeded.

  In the heat generation restriction control device according to one aspect of the present invention, the electronic device is a recording device including one or more electric motors and a recording head as the actuator, and the second heat storage calculation unit includes the first heat storage calculation unit. It is preferable that the current value used for calculating the heat storage information of 2 includes the current value of the recording head.

  According to the above configuration, since the current value of the print head is included in the current value used for the calculation of the second heat storage information related to the heat storage amount of the power source, the current value of the power source can be calculated with relatively high accuracy in the recording apparatus. For this reason, it is possible to avoid as much as possible the inconvenience that the unnecessary heat generation restriction control is started or the start of the necessary heat restriction control is delayed due to the low accuracy of the heat storage information of the power source.

  In the heat generation restriction control device according to one aspect of the present invention, it is preferable that the second heat storage calculation unit calculates the current value of the recording head based on head operating rate information regarding the operating rate of the recording head. .

  According to the above configuration, since the second heat storage calculation unit calculates the current value of the recording head based on the head operating rate information, it is possible to acquire the current value of the recording head with relatively high accuracy. For this reason, the current value of the power source can be acquired with relatively high accuracy, and thereby, heat storage information of the power source can be acquired with high accuracy. Therefore, it is possible to avoid as much as possible the inconvenience that the unnecessary heat generation restriction control is started or the start of the necessary heat generation restriction control is delayed due to the low accuracy of the heat storage information of the power source.

  One aspect of the present invention is an electronic apparatus, comprising: one or more actuators; a power source that supplies power to the actuators; and the heat generation restriction control device according to the invention. To do. According to the above configuration, since the electronic device includes the heat generation restriction control device according to the invention, the same effects as those of the invention according to the heat generation restriction control device can be obtained.

  One aspect of the present invention is a heat generation restriction control method for an electronic device that restricts heat generation between at least one of the one or more actuators provided in the electronic device and a power source and the heat generation. A first heat storage calculation step of calculating first heat storage information related to the heat storage amount of the actuator based on the current value of the actuator to be restricted; and a second heat storage related to the heat storage amount of the power source based on the current value of the power source. A second heat storage calculation step for calculating information, a first pause time calculation step for calculating a first pause time based on the first heat storage information, and a second pause based on the second heat storage information A second pause time calculating step for calculating time, and a pause time setting step for setting the longest one of the first pause time and the second pause time as a pause time And-up, and summarized in that a control step of controlling so as to put the pause time pause in between driving at least one of said actuators. According to the said method, the effect similar to the invention which concerns on the heat_generation | fever limitation control apparatus can be acquired.

FIG. 3 is a perspective view of the printer according to the first embodiment. The perspective view which shows the principal part of a printer. FIG. 3 is a block diagram illustrating an electrical configuration of the printer. (A) is a graph which shows difference (DELTA) dT of exothermic temperature and a threshold value, (b) is a graph which shows the correspondence of difference (DELTA) dT and suspension rate Wp. FIG. 3 is a block diagram illustrating a functional configuration of a computer included in the printer. The flowchart which shows heat_generation | fever limitation control. (A) is a graph which shows heat_generation | fever temperature, (b) is a graph which shows rest time. The block diagram which shows the function structure of the computer in 2nd Embodiment.

(First embodiment)
A first embodiment in which an electronic apparatus of the present invention is embodied in an ink jet printer that is an example of a recording apparatus will be described below with reference to FIGS.

  As shown in FIG. 1, an ink jet printer (hereinafter simply referred to as “printer 11”), which is an example of a recording apparatus, includes an operation panel 13 on the front upper portion of a substantially square box-shaped main body 12. On the lower side, a paper feed cassette 14 capable of accommodating a plurality of sheets P is mounted in a state where it can be inserted into and removed from the main body 12. The printer 11 performs printing on the paper P fed from the paper feed cassette 14, and discharges the printed paper P onto a paper discharge tray 15 provided at the front middle position of the main body 12.

  The operation panel 13 includes an operation unit 16 that is operated to input various instructions and the like to the printer 11, and a display device 17 that displays various menus and images on the screen. The operation unit 16 includes a power switch 16a, a print start switch 16b, a selection switch 16c, and the like. For example, by operating the selection switch 16c on the menu displayed on the display device 17 and selecting various items, it is possible to select an image to be printed and set printing conditions. In addition, a USB port 18 through which a USB memory UM can be inserted and removed and a card slot 19 through which a memory card MC can be inserted and removed are provided at the front side end (right end in FIG. 1) of the main body 12.

  Next, the internal configuration of the printer 11 will be described. As shown in FIG. 2, the printer 11 has a substantially square box-shaped main body frame 20 that opens on the upper side and the front side, and has a predetermined length constructed between the left and right side walls of the main body frame 20 in FIG. 2. The guide shaft 21 is provided with a carriage 22 that can reciprocate in the main scanning direction X. An endless timing belt 24 is wound around a pair of pulleys 23 attached to the inner surface of the back plate of the main body frame 20, and the carriage 22 is fixed to a part of the timing belt 24. A drive shaft (output shaft) of a carriage motor 25 is connected to the right pulley 23 in FIG. 2, and the carriage motor 25 is driven in the forward and reverse directions so that the timing belt 24 rotates in the forward and reverse directions. Reciprocates in the scanning direction X.

  An ink jet recording head 26 is provided below the carriage 22. A plurality of (for example, four) ink cartridges 27 each containing four color inks of black (K), cyan (C), magenta (M), and yellow (Y) are loaded on the carriage 22. Has been. On the nozzle formation surface (lower surface) of the recording head 26, a nozzle row in which a plurality of (for example, 180) nozzles are arranged in rows for each ink color is formed in the same number as the ink color (four rows in this example). Has been. The ink supplied from each ink cartridge 27 is ejected from each ink color nozzle. Further, a support base 28 that defines a gap (gap) between the recording head 26 and the paper P is provided at a position below the movement path of the carriage 22 so as to extend in the main scanning direction X. The ink colors that can be ejected by the recording head 26 are not limited to four colors, and may be three colors or five to eight colors.

  A linear encoder 29 that outputs a number of pulses proportional to the amount of movement of the carriage 22 is provided on the back side of the carriage 22 so as to extend along the guide shaft 21. In the printer 11, position control and speed control of the carriage 22 are performed based on the pulse signal output from the linear encoder 29. An ejection timing signal of the recording head 26 is also generated from the pulse signal output from the linear encoder 29. Therefore, an image is printed on the paper P by the recording head 26 at a constant dot pitch (pixel pitch) in the main scanning direction X.

  Further, a feed motor 31 and a transport motor 32 are disposed at the lower right side of the main body frame 20 in FIG. The feeding motor 31 drives a sheet feeding roller (not shown) (for example, a pickup roller) that feeds a plurality of sheets P set in the sheet feeding cassette 14 one by one. A transport roller pair 33 and a discharge roller pair 34 are disposed on the upstream side and the downstream side of the support base 28 in the transport direction Y (sub-scanning direction), respectively. The transport roller pair 33 includes a transport drive roller 33a that is rotationally driven by the power of the transport motor 32, and a transport driven roller 33b that rotates in contact with the transport drive roller 33a. The discharge roller pair 34 includes a discharge drive roller 34a that is rotationally driven by the power of the transport motor 32, and a discharge driven roller 34b that rotates in contact with the discharge drive roller 34a. When the conveyance motor 32 is rotationally driven, the conveyance drive roller 33a and the discharge drive roller 34a are driven, and the paper P is conveyed in the sub-scanning direction Y while being sandwiched (nip) between the roller pairs 33 and 34.

  In the printer 11, a printing operation for ejecting ink from the nozzles of the recording head 26 to the paper P while reciprocating the carriage 22 in the main scanning direction X, and a feeding operation for transporting the paper P in the sub-scanning direction Y by a predetermined transport amount. Are alternately repeated to print a document, an image, or the like on the paper P. In the present embodiment, the carriage motor 25, the feed motor 31, and the transport motor 32 constitute an example of an actuator.

  In FIG. 2, one end position on the movement path of the carriage 22 (right end position in FIG. 2) is a home position (home position) where the carriage 22 stands by when not printing. A maintenance device 35 that performs maintenance including cleaning on the recording head 26 is disposed immediately below the carriage 22 disposed at the home position. The transport motor 32 according to the present embodiment is also a power source for the maintenance device 35.

  Next, the electrical configuration of the printer 11 will be described with reference to FIG. As shown in FIG. 3, the printer 11 includes a controller 39. The controller 39 includes a power supply device 40 as an example of a power supply, a computer 41 (microcomputer), a display drive circuit 42, a head drive circuit 43, and motor drive circuits 44 to 46. The computer 41 includes, as an input system, an operation unit 16, a USB interface (hereinafter referred to as “USB I / F 47a”), a card interface (hereinafter referred to as “card I / F 47b”), and a linear encoder 29. Various sensors 29, 48, and 49 are connected. Further, a display drive circuit 42, a head drive circuit 43, and motor drive circuits 44 to 46 are connected to the computer 41 as an output system.

  The power supply apparatus 40 generates a primary voltage (for example, a predetermined value within a range of 30 to 60 volts) by transforming and rectifying the AC voltage from the commercial AC power supply 50, and further lowering the primary voltage to reduce the voltage. The next voltage (for example, a predetermined value within a range of 15 to 25 volts) is generated. The primary voltage is mainly applied to the motor drive circuits 44 to 46, and the secondary voltage is applied to the head drive circuit 43. Further, an output voltage (for example, a predetermined value within a range of 5 to 20 volts) obtained by stepping down the secondary voltage is applied to the display drive circuit 42. Further, an output voltage obtained by stepping down the secondary voltage (for example, a predetermined value within a range of 3 to 6 volts) is supplied to the computer 41 and various sensors 29, 48, and 49.

  When the computer 41 outputs a control signal to each of the drive circuits 42 to 46, a drive voltage corresponding to the control signal is applied to the display device 17, the recording head 26, and each of the motors 25, 31, and 32. In other words, a current corresponding to the control signal flows through the display device 17, the recording head 26, and the motors 25, 31, and 32. The computer 41 outputs a display control signal (display data and control signal) as a control signal to the display drive circuit 42, whereby a current corresponding to the display data flows through the display device 17. In addition, the computer 41 outputs head control data as a control signal to the head drive circuit 43, whereby a current corresponding to the head control data flows through the recording head 26. Furthermore, when the computer 41 outputs, for example, a PWM (pulse width modulation) signal as a control signal to each motor drive circuit 44 to 46, each motor 25, 31 and 32 has a PWM signal duty ratio (pulse with respect to the period of the PWM signal). A current corresponding to the width ratio flows.

  Here, the sensors provided in the printer 11 include the following. A linear encoder 29 that outputs a pulse signal having a pulse number proportional to the rotation amount of the carriage motor 25, a paper detection sensor 48 that detects the leading edge of the paper P at a predetermined position during feeding, and a rotation amount of the conveyance motor 32. The rotary encoder 49 outputs a pulse signal having the number of pulses. In the present embodiment, the display device 17 and the sensors 29, 48, and 49 constitute an example of a non-power system load.

  The computer 41 includes a CPU 51, an ASIC 52, a RAM 53, and a nonvolatile memory 54. The CPU 51 performs various controls such as a printing system, an operating system, and a display system by executing a control program (for example, a firmware program) stored in the nonvolatile memory 54. In particular, in the present embodiment, the CPU 51 executes the heat generation restriction control program shown in the flowchart of FIG. 6 stored in the nonvolatile memory 54, thereby reducing the heat generation temperatures of the power supply device 40 and the motors 25, 31, 32 as much as possible. Heat limit control is performed to limit each heat generation so as to keep the temperature below (standard allowable temperature). Further, the RAM 53 temporarily stores print data, the calculation result of the CPU 51, and the like.

  The CPU 51 is connected to the display device 17 via the display drive circuit 42. The CPU 51 monitors the state of the printer 11 and the presence or absence of an operation, and outputs a display control signal corresponding to the monitored content to the display drive circuit 42, whereby a menu, a print condition setting screen, and a print are displayed on the display unit of the display device 17. An image, a notification image, etc. are displayed. The CPU 51 is connected to the recording head 26 via the head driving circuit 43. The CPU 51 outputs the head control data (bitmap data) obtained by expanding the print data received from the host device (not shown) and the ejection control signal to the head drive circuit 43, thereby causing the recording head 26 to An ejection drive pulse (voltage pulse) is applied to an ejection drive element (for example, a piezoelectric element) provided for each nozzle. The ejection driving element ejects ink droplets from the nozzles by applying vibration corresponding to the applied ejection driving pulse to the ink chamber communicating with the nozzle to expand and compress the ink chamber. The CPU 51 is connected to the carriage motor 25 via the motor drive circuit 44. The CPU 51 drives and controls the carriage motor 25 by outputting a PWM signal to the motor drive circuit 44. At this time, a driving voltage corresponding to the duty ratio of the PWM signal is applied to the carriage motor 25, and a current corresponding to the driving voltage flows.

  The CPU 51 is connected to the feed motor 31 via the motor drive circuit 45. The CPU 51 drives and controls the feeding motor 31 by outputting a PWM signal to the motor driving circuit 45. At this time, a driving voltage corresponding to the duty ratio of the PWM signal is applied to the feeding motor 31, and a current corresponding to the driving voltage flows. Further, the CPU 51 is connected to the transport motor 32 via the motor drive circuit 46. The CPU 51 drives and controls the transport motor 32 by outputting a PWM signal to the motor drive circuit 46. At this time, a driving voltage corresponding to the duty ratio of the PWM signal is applied to the transport motor 32, and a current corresponding to the driving voltage flows. The motors 25 and 32 are each supplied with a current having a direction corresponding to the direction command signal output from the CPU 51 to the motor drive circuits 44 to 46. The motors 25 and 32 rotate forward or reverse according to the direction command signal. To do. The CPU 51 reverses the transport motor 32 in order to drive the maintenance device 35 when the cleaning execution condition is satisfied.

  The CPU 51 grasps the moving direction of the carriage 22 based on the pulse signal from the linear encoder 29, that is, the carriage 22 moves forward and backward. The CPU 51 includes a CR counter (not shown) that manages the position of the carriage 22 and resets the CR counter when the carriage 22 is at the origin position. The count value of the CR counter is incremented every time the pulse edge is detected during the forward movement of the carriage 22 and the count value of the CR counter is decremented every time the pulse edge is detected during the backward movement. From this, the carriage position in the main scanning direction X is grasped. The speed control of the carriage motor 25 is performed by referring to a speed control table (not shown) indicating the correspondence between the carriage position and the speed command value based on the starting position of the carriage 22, and a speed command value corresponding to the carriage position. Is obtained, and a PWM signal having a duty ratio corresponding to the speed command value is generated and output to the motor drive circuit 44.

  The CPU 51 drives the feed motor 31 by outputting to the motor drive circuit 45 a PWM signal having a duty ratio corresponding to a speed command value for feeding the paper P in accordance with a predetermined feed speed profile. Control. Further, the CPU 51 resets a first transport counter (not shown) when the paper detection sensor 48 detects the leading edge of the paper P during feeding, and then the pulse signal input from the rotary encoder 49 by the first transport counter is reset. By counting the number of pulse edges, the transport position of the paper P is recognized from the counted value. Further, the CPU 51 resets a second conveyance counter (not shown) at the start of conveyance of the paper P, and counts the number of pulse edges of the pulse signal input from the rotary encoder 49 by the second conveyance counter. The transport position from the transport start position of the paper P is recognized.

  In the non-volatile memory 54, a conveyance speed control table (not shown) indicating a correspondence relationship between a conveyance position for determining a speed profile in the conveyance process of the paper P and a speed command value is provided for each target conveyance speed (constant speed). Is remembered. The CPU 51 selects a transfer speed control table for a target transfer speed corresponding to the requested transfer amount, refers to the selected transfer speed control table, acquires a speed command value corresponding to the current transfer position, and A PWM signal having a duty ratio corresponding to the speed command value is output to the motor drive circuit 46. Thereby, the speed of the transport motor 32 is controlled according to the speed profile for transport at the target transport speed corresponding to the requested transport amount.

  Each of the motor drive circuits 44 to 46 includes, for example, a switching circuit having a plurality of transistors. By turning the transistors on and off based on the PWM signal, the duty ratio of the PWM signal to each motor 25, 31, 32 is set. A drive voltage according to the above is applied. A motor current corresponding to the applied drive voltage flows through each motor 25, 31, 32. That is, the motor current has a value proportional to the duty ratio of the PWM signal.

  FIG. 5 shows functional blocks constructed in the computer 41 by the CPU 51 executing predetermined programs including the heat generation restriction control program shown in FIG. As shown in FIG. 5, the computer 41 includes a main control unit 60, a display control unit 61, a head control unit 62, a carriage control unit (hereinafter referred to as “CR control unit 63”), a feeding control unit (hereinafter referred to as “CR”). An "ASF control unit 64"), a conveyance control unit (hereinafter referred to as "PF control unit 65"), and a heat generation restriction control unit 66.

  The main control unit 60 performs overall control of the printing system, operation system, display system, and the like of the printer 11. The main control unit 60 includes a mode management unit 60 a that manages the power consumption mode of the printer 11. The mode management unit 60a manages whether the power consumption mode is the normal mode, the power saving mode, or the power-off mode. Specifically, the mode management unit 60a sets the elapsed time for power saving while the operation system such as the operation unit 16 is not operated and the recording head 26 and the motors 25, 31, and 32 are not driven. When reaching, the mode shifts from the normal mode to the power saving mode. Further, when the elapsed time reaches the set time for auto power off, the mode shifts from the power saving mode to the power off mode. The main controller 60 has a power saving function for reducing the power supply voltage and an auto power off function (auto power off function) for automatically turning off the power. When shifting from the normal mode to the power saving mode, the main control unit 60 instructs the power supply device 40 to darken the display screen by, for example, reducing the supply voltage to the display device 17. When the power saving mode is shifted to the power off mode, the main control unit 60 instructs the power supply device 40 to stop the voltage supply except for a part of the operation system and the like.

  The mode management unit 60a shifts to the normal mode if the operation system is operated in the power saving mode or the power-off mode, or if one of the recording head 26 and each of the motors 25, 31, 32 is driven. To do. In the normal mode, the power supply device 40 applies supply voltages corresponding to all the loads such as all the drive circuits 42 to 46, the computer 41, and the sensors 29, 48, and 49, respectively. In the present embodiment, the power saving mode and the power off mode correspond to an example of the power saving mode.

  The display control unit 61 performs display control of the display device 17 via the display drive circuit 42. Specifically, the display control unit 61 outputs display data of various images to the display drive circuit 42 according to instructions from the main control unit 60, thereby causing the display device 17 to display a print image, a menu screen, a notification screen, and the like. .

  The head controller 62 controls the recording head 26 via the head drive circuit 43. Specifically, the head control unit 62 outputs, to the head drive circuit 43, head control data and ejection control data obtained by converting print image data included in the print data into a predetermined head compatible format in accordance with an instruction from the main control unit 60. Thus, ink ejection control of the recording head 26 is performed. The head control data is bitmap data in which one dot is represented by, for example, 2 bits, and the dot value is large dot “11”, medium dot “10”, small dot “01”, ejection according to the print dot size. None Has the value “00”. A drive signal including a plurality of voltage pulses having different voltages is input to the head drive circuit 43 at the same cycle as the ejection timing. The ejection control data is data indicating the correspondence between the dot value and the voltage pulse to be selected in the drive signal. The switch circuit for each nozzle in the head drive circuit 43 is turned on at a predetermined timing based on the dot value of the head control data input from the head control unit 62 and the ejection control data, so that a specified voltage pulse in the drive signal is supplied. The selected voltage pulse is applied to the ejection drive element. As a result, the ejection driving element displaces the diaphragm by an amount corresponding to the voltage pulse, and ink droplets having a size corresponding to the displacement of the diaphragm are ejected from the nozzles of the recording head 26. In this way, ink droplets having a size corresponding to each dot value (2-bit value) of the head control data are ejected from the nozzles of the recording head 26. The size of ink droplets ejected from the recording head 26 (that is, the dot size) is not limited to three types of large, medium, and small, and may be one type, two types (large and small), or four or more types. Good.

  The CR control unit 63 includes a PWM circuit (not shown) that generates a PWM signal. The CR control unit 63 refers to the carriage speed control table stored in the nonvolatile memory 54, obtains a speed command value corresponding to the carriage position, and outputs a PWM signal having a duty ratio corresponding to the speed command value. Generate by circuit. The CR control unit 63 drives and controls the carriage motor 25 by outputting the generated PWM signal to the motor drive circuit 44.

  The ASF control unit 64 includes a PWM circuit (not shown) that generates a PWM signal. The ASF control unit 64 refers to the feeding speed table stored in the nonvolatile memory 54, acquires a speed command value corresponding to the feeding position, and outputs a PWM signal having a duty ratio corresponding to the speed command value. Generated by PWM circuit. Then, the ASF control unit 64 drives and controls the feeding motor 31 by outputting the generated PWM signal to the motor drive circuit 45.

  The PF control unit 65 includes a PWM circuit (not shown) that generates a PWM signal. The PF control unit 65 refers to the transport speed control table stored in the nonvolatile memory 54, acquires a speed command value corresponding to the transport position, and PWMs a PWM signal having a duty ratio corresponding to the speed command value. Generate by circuit. Then, the PF control unit 65 drives and controls the transport motor 32 by outputting the generated PWM signal to the motor drive circuit 46.

  The heat generation restriction control unit 66 includes a CR heat storage amount calculation unit 71 that calculates a heat generation temperature dTsumM1 of the carriage motor 25, an ASF heat storage amount calculation unit 72 that calculates a heat generation temperature dTsumM2 of the feeding motor 31, and a heat generation temperature dTsumM3 of the transport motor 32. A PF heat storage amount calculation unit 73 is provided. Furthermore, the heat generation restriction control unit 66 includes a power storage amount calculation unit 74 that calculates the heat generation temperature dTsumP of the power supply device 40. Here, the heat generation temperatures dTsumMn and dTsumP are the temperature rises of the power supply device 40 and the motors 25, 31, and 32 that have generated heat due to the current flowing in the power supply device 40 and the motors 25, 31, and 32 after the printer 11 is turned on. Is the temperature in minutes. Therefore, the heat generation temperatures dTsumMn and dTsumP have values proportional to the amount of heat stored in the power supply device 40 and the motors 25, 31, and 32 since the printer 11 is turned on. The power supply device 40 and the motors 25 and 31 that have generated heat due to the current that has flowed through the power supply device 40 and the motors 25, 31, and 32 after the printer 11 is turned on at the initial temperature (for example, room temperature) when the printer 11 is turned on. , 32 (in other words, the heat generation temperature dTsum) is added to the temperature T (° C.) instead of the heat generation temperature dTsum, and the heat generation restriction control may be performed. In this case, the temperature T is continuously calculated until a predetermined time elapses after the printer 11 is turned off. If the next power-on is performed within the predetermined time, the calculated temperature T is set as the initial temperature. Can also be adopted.

  Further, the heat generation restriction control unit 66 determines whether or not the heat generation temperature dTsumMn, which is the calculation result of each of the heat storage amount calculation units 71 to 73, exceeds each threshold value dTmaxMn (where n = 1, 2, 3). To third determination units 75 to 77, and a power source determination unit 78 that determines whether or not the heat generation temperature dTsumP that is the calculation result of the power storage amount calculation unit 74 exceeds the threshold value dTmaxP. Further, the heat generation restriction control unit 66 calculates first to third pause times for calculating pause times TWMn (where n = 1, 2, 3) corresponding to the determination results of the first to third decision units 75 to 77, respectively. Calculation units 79 to 81 and a power supply pause time calculation unit 82 that calculates a pause time TWP according to the determination result of the power supply determination unit 78 are provided. Furthermore, the heat generation restriction control unit 66 compares the suspension times TWMn and TWP which are the calculation results of the suspension time calculation units 79 to 82, and determines the longest one as the suspension time TW, and the comparison unit A pause time setting unit 84 that sets the pause time TW determined by 83 as a wait time before the carriage motor 25 is driven.

  In the present embodiment, each heat storage amount calculation unit 71 to 73 configures an example of a first heat storage calculation unit, and the power source heat storage amount calculation unit 74 configures an example of a second heat storage calculation unit. Further, the heat generation temperature dTsumMn (where n = 1, 2, 3) corresponds to an example of the first heat storage information, and the heat generation temperature dTsumP corresponds to an example of the second heat storage information. The threshold value dTmaxMn corresponds to an example of a first threshold value, and the threshold value dTmaxP corresponds to an example of a second threshold value. Further, the first to third determination units 75 to 77 constitute an example of a first determination unit, and the power source determination unit 78 constitutes an example of a second determination unit. In addition, the first to third pause time calculators 79 to 81 constitute an example of a first pause time calculator, and the power pause time calculator 82 constitutes an example of a second pause time calculator. The pause time TWMn (where n = 1, 2, 3) corresponds to an example of the first pause time, and the pause time TWP corresponds to an example of the second pause time. In the present embodiment, the comparison unit 83 and the pause time setting unit 84 constitute an example of a setting unit.

  As described above, the CR control unit 63, the ASF control unit 64, and the PF control unit 65 output the generated PWM signals to the motor drive circuits 44 to 46, respectively, thereby controlling the speeds of the motors 25, 31, and 32. To do. At this time, the current values of the motors 25, 31, 32 are proportional to the duty ratio of the PWM signal output for these controls. For this reason, in this embodiment, in order to acquire each electric current value used for calculation of the heat generation temperature of each motor 25, 31, 32, each control part 63-65 respond | corresponds for every unit time (for example, 1 millisecond), respectively. The duty ratio of the PWM signal is sent to each heat storage amount calculation unit 71-73.

  And each heat storage amount calculating part 71-73 is motor current value of each motor 25, 31, 32 based on the duty ratio of the PWM signal acquired from each control part 63-65 for every unit time (for example, 1 millisecond). IMn (where n = 1, 2, 3) is calculated. The motor current value IMn is given by the formula IMn = IMnmax × D. Here, IMmax is a motor maximum current value, and D is a duty ratio (= pulse width / PWM cycle). In this embodiment, the current value IM1 of the carriage motor 25, the current value IM2 of the feeding motor 31, and the current value IM3 of the transport motor 32 are used.

Then, an effective current value Ie every 60 seconds is calculated based on the current value I (IMn or the like) per unit time. The effective current value Ie is expressed by the following equation.
Ie = √ {(I 1 ² · t + I ^{2 2} · t +... + Ik ² · t) / 60} (1)
Here, t is a unit time, for example, 1 millisecond. By substituting the motor current value IMn for I in the above equation (1), the effective current value Ie of each motor 25, 31, 32 is calculated.

Furthermore, each heat storage amount calculation part 71-73 calculates the emitted-heat amount of 60 seconds of each motor 25, 31, 32 based on the effective current value Ie. Generally, the calorific value is given by Q = J · W. Here, J is a coefficient for converting a certain work W into heat generation. Further, since the work W is given by I ² · R · t, the calorific value Q is Q = I ² · R · t · J. Here, R is the resistance (constant) of the winding of the motor. In the present embodiment, the calorific value Q is calculated according to the following equation (2).
Q = J ・ R ・ Ie ²・ 60 (2)
Since J and R are constants and have a relationship of Q∝I ² · t, I ² · t may be regarded as the calorific value Q.

Next, each of the heat storage amount calculation units 71 to 73 calculates the heat generation temperature dTsum based on the heat generation amount Q. The heat generation temperature dTnew per unit time (for example, 60 seconds) is calculated by dTnew = Ka · Q using the conversion coefficient Ka for converting the heat generation amount Q into temperature. The exothermic temperature dTold that the heat generation temperature dTsum falls along the heat radiation curve and reaches 60 seconds later is expressed by dTold = K · dTsum using the heat radiation coefficient K. Therefore, the latest heat generation temperature dTsum (total heat generation temperature) of the motor is obtained by adding the latest heat generation temperature dTnew to the value obtained by multiplying the previous heat generation temperature dTsum by the heat dissipation coefficient K (the latest 60 seconds) (3 ).
dTsum = K · dTsum + dTnew (3)
Here, the heat dissipation coefficient K takes a different value depending on whether the heat generation system is driving the carriage or the heat dissipation system is stopping the carriage. In the present embodiment, as an example, the number of carriage movements Ncr within the most recent predetermined time is counted, and when the carriage movement number Ncr is equal to or greater than the set number No, the heat dissipation coefficient K of the heat generating system is used, and the carriage movement number Ncr is the set number of times. When it is less than No, the heat dissipation coefficient K of the heat dissipation system is used. The heat generation temperature dTsum corresponds to a value obtained by converting the amount of heat stored by energization of the motors 25, 31, and 32 into a heat generation temperature. For this reason, if the current heat storage amount is added to the previous heat storage amount, the current heat storage amount is obtained, so even if the current heat storage amount is obtained and then this heat storage amount is converted into temperature, the heat generation temperature is obtained. Good. That is, the heat storage amount dQsum = K · dQsum + dQnew is calculated, and the heat generation temperature dTsum is calculated by multiplying the heat storage amount dQsum by the conversion coefficient Ka that converts the heat storage amount dQsum into a temperature. Note that the heat storage information regarding the heat storage amount may be the heat storage amount itself instead of the heat generation temperature.

  When each heat storage amount calculation unit 71 to 73 calculates the heat generation temperature dTsumMn (where n = 1, 2, 3) of the motor, it sends the calculated heat generation temperature dTsumMn to the first to third determination units 75 to 77, respectively.

  On the other hand, the power storage amount calculation unit 74 includes current values Ih, IMn (where n = 1, 2, 3) flowing through the recording head 26 and the motors 25, 31, 32, the display device 17, the computer 41, and The sum of the current value Ind of the total current flowing through the load group of the non-power system including the sensors 29, 48, 49 and the like is calculated as the current value Ip of the current flowing through the power supply device 40 (Ip = Ih + IM1 + IM2 + IM3 + Ind). Then, based on the power supply current value Ip, the heat generation temperature dTsumP of the power supply device 40 is calculated using the equations (1) to (3).

  Here, the current value Ih of the current flowing through the recording head 26 changes according to the head operating rate determined from the print mode and the print image data. The print mode includes a draft print mode in which the print speed is given priority over the print quality, a high-quality print mode in which the print quality is given priority over the print speed, and a normal print mode intermediate between the draft print mode and the high-quality print mode. . In the draft printing mode, when the print pixel density (printing resolution) is low and the print image data is the same, the number of ejections (ejection frequency) per unit time that the recording head 26 ejects from the nozzles is relatively small (that is, the ejection cycle). Therefore, the head operation rate tends to be low. In the high image quality printing mode, the print pixel density (printing resolution) is high, and the number of ejections (ejection frequency) per unit time of the recording head 26 is relatively large (that is, the ejection cycle is short). It tends to be higher. In the normal printing mode, the printing pixel density (printing resolution) is approximately halfway between the draft printing mode and the high image quality printing mode, and the number of ejections (ejection frequency) per unit time of the recording head 26 is medium (that is, the ejection cycle). Therefore, the head utilization rate tends to be medium.

  Further, the recording head 26 of the present embodiment forms ink dots of three different sizes to form dots of three different sizes. At this time, when focusing on one nozzle, the larger the dot size, the higher the voltage pulse is applied to the ejection driving element (piezoelectric element) provided for each nozzle in the recording head 26. Therefore, one ejection driving element. A current having a high current value flows. In this embodiment, the current value of the current flowing through the ejection driving element for each dot size is known in advance. The current value Il when the dot size is the large dot “11”, the current value Im when the dot is the medium dot “10”, and the current value Is when the dot size is “01”. The unit pulse signal input to the head drive circuit 43 for each ejection cycle includes a plurality of voltage pulses having different voltages.

  The head drive circuit 43 includes the same number of switching elements (not shown) as the ejection drive elements as the nozzles. A first voltage pulse and a second voltage pulse constituting a drive pulse signal are sequentially applied to each switching element, and a large dot “11”, a medium dot “10”, a small dot “01”, and no ejection “00” The dot value indicated by “is input. At this time, the lower digit of the dot value is input to the switching element at the timing when the first pulse is applied, and the upper digit is input at the timing at which the second pulse is applied. The switching element turns on when the last digit of the dot value is “1” at the input timing of the first pulse and turns off when it is “0”, and at the input timing of the second pulse, the first digit of the dot value is “ Turns on when “1” and turns off when “0”. A voltage pulse selected at the timing when the switching element is turned on is applied to the ejection driving element. When the dot value is “00” (no ejection), neither the first pulse nor the second pulse is selected. When the dot value is “01” (small dot), the first pulse (low voltage pulse) is selected and “10”. When it is (medium dot), the second pulse (high voltage pulse) is selected, and when it is “11” (large dot), both the first and second pulses are selected. Thus, when the dot value is “00”, the ink droplet is not ejected, when it is “01”, the ink droplet is ejected with the small dot amount, and when it is “10”, the ink droplet is ejected with the medium dot amount. When “11”, ink droplets are ejected in the amount of large dots.

  The 180 ejection drive elements corresponding to the 180 nozzles constituting the nozzle row do not flow current when the dot value is “00”, and the current Is flows when the dot value is “01”. When the value is “10”, the current Im flows, and when the dot value is “11”, the current Il flows (Is <Im <Il). A voltage pulse selected based on the dot value is applied every ejection cycle. This ejection cycle is determined according to the printing mode. Therefore, the current value of the current flowing through all the ejection drive elements is determined according to the print mode and the print image data (dot value).

  Here, the head operating rate is that all dot values of print image data are large dots “11”, and the maximum ejection force (dot size “large” from all (for example, 180 × 4 colors) nozzles of the recording head 26). )), The total current value per injection when the injection is performed is the maximum head duty Hmax (“1”). Further, a total current value per ejection obtained by summing the current values corresponding to the dot values applied to the ejection driving elements for each nozzle by the total number of nozzles is defined as a head duty H. At this time, the head duty ratio Hd is expressed by Hd = H / Hmax, and in this embodiment, the head duty ratio Hd is used as the head operating rate.

  The power storage amount calculation unit 74 calculates the current value of the recording head 26 using, for example, one cycle to several cycles of the injection cycle as a unit time. In this example, the unit time is described as 1 millisecond as an example. The power storage amount calculation unit 74 receives the head control data from the head control unit 62 for one pass or one to several times of ejection, and based on the dot value of the number of dots for one ejection of the head control data, the head duty The ratio Hd (head operating rate information) is calculated. Then, the power storage amount calculation unit 74 multiplies the head duty ratio Hd by the maximum head current value Ihmax (head current value when the duty ratio = 1) per unit time (for example, 1 millisecond), and the recording head 26. The head current value Ih per unit time is calculated (Ih = Hd · Ihmax).

  In addition, the power storage amount calculation unit 74 acquires the duty ratio of each PWM signal output when controlling each motor 25, 31, 32 from each control unit 63 to 65 every unit time (for example, 1 millisecond). . Based on the duty ratio of each PWM signal used for controlling each motor 25, 31, 32, the current value for each unit time of each motor 25, 31, 32 is calculated. Of course, the power storage amount calculation unit 74 may acquire the current value calculated by each heat storage amount calculation unit 71 to 73 for each unit time.

  Further, the power storage amount calculation unit 74 acquires a current value Ind of a current flowing through a non-powered load group including the display device 17, the computer 41, and the sensors 29, 48, 49 and the like. In the present embodiment, the current value Ind of the non-power system load group is regarded as a constant value. However, the current value Ind of the load group of the non-power system depends on the power consumption mode. For this reason, the power storage amount calculation unit 74 acquires the power consumption mode from the mode management unit 60a, and acquires a constant current value corresponding to the power consumption mode. Specifically, when the power consumption mode is the normal mode, a constant current value In is adopted as the current value Ind of the non-powered load group, and when the power consumption mode is the power saving mode, a constant current value Ic smaller than the current value In is adopted. In the power-off mode, a constant current value Ioff smaller than the current value Ic is employed (In> Ic> Ioff).

  Then, the power storage amount calculation unit 74 calculates the current value Ip of the power supply device 40 by calculating the sum of the current values Ih, IMn, Ind (Ip = Ih + IMn + Ind). Then, the heat generation temperature dTsumP of the power supply device 40 is calculated based on the power supply current value Ip in a manner similar to the calculation method of the heat generation temperature dTsumMn of the motors 25, 31, 32. Specifically, the effective current value Ipe for each unit time (60 seconds) is calculated based on the power supply current value Ip acquired every unit time (1 millisecond), and further, the unit time (60 seconds) based on the effective current value Ipe. ) Calculate the calorific value Qp for each. Further, the heat generation temperature dTsumP is calculated every unit time (60 seconds) based on the heat generation amount Qp.

  The first to third determination units 75 to 77 determine whether or not the heat generation temperature dTsumMn exceeds the respective threshold value dTmaxMn (where n = 1, 2, 3). That is, the first determination unit 75 determines whether or not the heat generation temperature dTsumM1 of the carriage motor 25 exceeds the first threshold value dTmaxM1. The second determination unit 76 determines whether or not the heat generation temperature dTsumM2 of the feeding motor 31 has exceeded the second threshold value dTmaxM2. The third determination unit 77 determines whether or not the heat generation temperature dTsumM3 of the transport motor 32 exceeds the third threshold value dTmaxM3. Furthermore, the power supply determination unit 78 determines whether or not the heat generation temperature dTsumP of the power supply device 40 exceeds the power supply threshold dTmaxP. In the following description, the exothermic temperatures dTsumMn and dTsumP may be simply referred to as “dTsum” unless otherwise distinguished, and the threshold values dTmaxMn and dTmaxP may be simply denoted as “dTmax”.

  The first to third downtime calculation units 79 to 81 are respectively first to third when the corresponding first to third determination units 75 to 77 determine that the heat generation temperature dTsumMn exceeds the respective threshold value dTmaxMn. The pause time TWMn (that is, TWM1, TWM2, TWM3) is calculated.

  When the power supply determination unit 78 determines that the heat generation temperature dTsumP exceeds the threshold value dTmaxP, the power supply suspension time calculation unit 82 calculates the power supply suspension time TWP. Here, the power supply suspension time TWP is determined before the carriage motor 25 is driven so that the heat generation temperature dTsumP of the power supply device 40 once drops below the power supply limit temperature relatively quickly even if the heat generation temperature dTsumP exceeds the power supply limit temperature. Refers to the downtime to be included in

  The first to third rest time calculation units 79 to 81 calculate the motor rest time TWMn = TMcr · WMn. Here, TMcr is the previous drive time when the carriage motor 25 was driven for one pass last time. The drive time for one pass of the carriage motor 25 is measured by a timer (not shown) provided in the computer 41. WMn is a pause rate for determining the motor pause time TWMn. In this embodiment, the longer the driving time TMcr of the previous carriage motor 25 is, the longer the pause time TWMn to be set before the carriage motor 25 is driven is. WMn is set. In addition, the power supply suspension time calculation unit 82 calculates the power supply suspension time TWP by the equation TWP = TMcr · WP. Here, WP is a pause rate for determining the power pause time TWP.

  Here, how to determine the suspension rates WMn and WP will be described. FIG. 4A shows the relationship between time t and heat generation temperature dTsum. As shown in FIG. 4A, for example, when the heat generation temperature dTsum (tn) at the time tn exceeds the threshold value dTmax, the larger the difference ΔdT (= dTsum−dTmax) (> 0) is larger. The pause time TW is set to be long.

  That is, as shown in FIG. 4B, the pause time calculation units 79 to 82 calculate the pause rate Wp using a linear function expression Wp = A · ΔdT + B of the difference ΔdT. Specifically, the first to third pause time calculation units 79 to 81 calculate the pause rate WMn by the formula WMn = An · ΔdT + Bn. Here, WMn (where n = 1, 2, 3) is a pause rate for each motor 25, 31, 32, and constants An, Bn (where n = 1, 2, 3) are motors 25, 31, 32. It is a constant for each. Then, the first to third pause time calculation units 79 to 81 multiply the previous drive time TMcr of the carriage motor 25 by the pause rate WMn to calculate the motor pause time TWMn (= TMcr · WMn).

  Further, the power supply pause time calculation unit 82 calculates the pause rate WP according to the formula WP = C · ΔdT + D. Here, the constants C and D are determined by preliminary experiments so that even if the heat generation temperature dTsumP of the power supply device 40 exceeds the power supply limit temperature, the heat generation temperature dTsumP drops relatively quickly below the power supply limit temperature. Value. Then, the power stop time calculation unit 82 multiplies the previous drive time TMcr of the carriage motor 25 by the stop rate WP to calculate the power stop time TWP (= TMcr · WP). When the heat generation temperature dTsum is less than the threshold value dTmax, the suspension rates WMn and WP are set to “0”. Thus, when each pause time calculation unit 79 to 82 calculates each pause time TWM1, TWM2, TWM3, and TWP, the pause time TWM1, TWM2, TWM3, and TWP are sent to the comparison unit 83.

  The comparison unit 83 compares the pause times TWM1, TWM2, TWM3, and TWP, and determines the longest one as the pause time TW. The comparison unit 83 sets the determined suspension time TW in the suspension time setting unit 84.

  The CR control unit 63 reads the pause time TW set in the pause time setting unit 84 and puts the pause of the pause time TW before driving the carriage motor 25. Due to the suspension of the suspension time TW, heat generation of the power supply device 40 and the motors 25, 31, 32 is limited. In the heat generation restriction control, the release temperature dToff is set. When the heat generation temperature dTsum falls to the release temperature dToff, the heat generation restriction control is released, and the CR control unit 63 puts a pause before the carriage motor 25 is driven. The carriage motor 25 is driven and controlled so as not to occur.

Next, the operation of the printer 11 of this embodiment will be described.
When the printer 11 is powered on, the CPU 51 in the computer 41 executes a heat generation restriction control program shown in the flowchart of FIG.

  When print data is received from the host device while the printer 11 is powered on, the printer 11 starts printing based on the received print data. The computer 41 in the controller 39 controls the feeding, transporting, recording, and discharging of the paper P according to a command obtained by interpreting the print data. First, in accordance with a feed command, the feed motor 31 and the transport motor 32 are driven to feed the paper P to the print start position. After feeding, the carriage 22 moves in the main scanning direction X, ejects ink droplets from the recording head 26 to perform recording for one pass on the paper P, and the required transport amount of the paper P to the next recording position. The conveyance operation is carried out alternately, and the printing of the image based on the print data on the paper P is advanced.

  While the printer 11 is powered on, a voltage is supplied to the non-powered load group including the display device 17, the computer 41, and the sensors 29, 48, 49, and the current Ind flows in the power supply device 40. During the printing operation of the printer 11, currents for driving the recording head 26 and the motors 25, 31, and 32 flow, and the recording head 26 and the motors 25, 31, and 32 generate heat due to the currents. . At this time, a current having the same value as the currents Ih and IMn flowing through the recording head 26 and the motors 25, 31, and 32 also flows in the power supply device 40, and the power supply device 40 also generates heat. In the present embodiment, the heat generation restriction control is performed so as to suppress the heat generation of the power supply device 40 and the motors 25, 31, and 32 as much as possible below the limit temperature.

  Hereinafter, the heat generation restriction control will be described with reference to FIG. In the flowchart of FIG. 6, two processes executed by the CPU 51 in parallel are shown in one flowchart. That is, the process of calculating the heat generation temperature dTsumMn and the downtime TWMn of each motor 25, 31, 32 in steps S1 to S8 and the process of calculating the heat generation temperature dTsumP and the downtime TWP of the power supply device 40 in steps S11 to S18. Run in parallel. In the flowchart of FIG. 6, some steps having different processing cycles are mixed.

First, the processing of steps S1 to S8 related to the motors 25, 31, and 32 will be described.
First, in step S1, the motor current is calculated every unit time (1 millisecond). Each of the heat storage amount calculation units 71 to 73 calculates the motor current IMn based on the duty ratio of the PWM signal.

In step S2, the motor effective current is calculated (every 60 seconds). This motor effective current IeMn is calculated based on the above equation (1) using the motor current value IMn.
In the next step S3, the motor heat generation amount is calculated (every 60 seconds). The motor heat generation amount QMn is calculated based on the equation (2) using the motor effective current value IeMn.

In step S4, the motor heat generation temperature dTsumMn is calculated (every 60 seconds). The motor heat generation temperature dTsumMn is calculated based on the equation (3) using the motor heat generation amount QMn.
In step S5, motor stoppage determination is performed. That is, it is determined whether the heat generation temperature dTsumMn is larger than the threshold value dTmaxMn. This determination process is performed by the first to third determination units 75 to 77. If dTsumMn> dTmaxMn is not established, the process proceeds to step S6. If dTsumMn> dTmaxMn is established, the process proceeds to step S7.

In step S6, the suspension rate WMn = 0 is set.
In step S7, the suspension rate WMn = An · ΔdTn + Bn is calculated. That is, the difference .DELTA.dTn = dTsumMn-dTmaxMn is obtained, and the difference .DELTA.dTn is substituted into the linear function equation to calculate the pause rate WMn.

In step S8, the motor stop time TWMn = TMcr · WMn is calculated. At this time, when the suspension rate WMn = 0, the motor suspension time TWMn = 0.
Next, processing in steps S11 to S18 related to the power supply device 40 will be described.

  First, in step S11, the power supply current Ip is calculated every unit time (1 millisecond). Depending on the head duty ratio Hd of the recording head 26, the duty ratio of the PWM signal when the motors 25, 31, 32 are controlled by the power storage amount calculation unit 74, and the current power consumption mode of the load group of the non-power system The power source current Ip is obtained by calculating the sum of the current values Ind.

In step S12, the power source effective current is calculated (every 60 seconds). The power source effective current IeP is calculated based on the above equation (1) using the power source current value Ip.
In the next step S13, the power supply heat generation amount is calculated (every 60 seconds). The power supply heat generation amount Qp is calculated based on the equation (2) using the power supply effective current value IeP.

In step S14, the power source heat generation temperature dTsumP is calculated (every 60 seconds). This power source heat generation temperature dTsumP is calculated based on the above equation (3) using the power source heat generation amount Qp.
In step S15, it is determined whether to stop power. That is, it is determined whether the heat generation temperature dTsumP is larger than the threshold value dTmaxP. This determination process is performed by the power supply determination unit 78. If dTsumP> dTmaxP is not established, the process proceeds to step S16. If dTsumP> dTmaxP is established, the process proceeds to step S17.

In step S16, the suspension rate WP = 0 is set.
In step S17, the suspension rate WP = C · ΔdT + D is calculated. That is, the difference ΔdT = dTsumP−dTmaxP is obtained, and the difference ΔdT is substituted into the linear function formula to calculate the pause rate WP.

  In step S18, the power supply suspension time TWP = TMcr · WP is calculated. Here, when the suspension rate WMn = 0, the power suspension time TWMn = 0. When all (four in this example) pause times TWMn and TWP are obtained as a result of the parallel processing, the process proceeds to step S19. In step S19, a pause time is set. In this pause time setting, the longest pause time TWMn and TWP is set as the pause time TW before the carriage motor 25 is driven.

  FIG. 7A is a graph showing the relationship between time and heat generation temperature when heat generation restriction control is performed. In the example shown in FIG. 7, since the power supply device 40 generates heat and the heat generation temperature dTsumP exceeds the threshold value dTmaxP, the heat generation restriction control is started. The heat generation temperature dTsumP of the power supply device 40 decreases and stays below the limit temperature as time passes after the heat generation restriction control is started.

  FIG. 7B shows the pause time TW set during the heat generation restriction control. As can be seen from the graph of FIG. 7B, when the heat generation temperature dTsum exceeds the threshold value dTmax, the pause time TW is set. In the example of FIG. 7B, since the power supply suspension time TWP is longer than the motor suspension time TWMn, the power supply suspension time TWP is set, and the heat generation restriction control in which the suspension of the power supply suspension time TWP enters before the carriage motor 25 is driven. Done. At this time, a pause time TW of 0.5 to 1 second is set. Thus, since the pause time is short, even if the pause occurs before the carriage 22 is driven, the operation of the printer 11 is not so uncomfortable.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The heat generation limitation of the power supply device 40 and the heat generation limitation of the motors 25, 31, 32 can both be appropriately achieved. In particular, the comparison of the downtime is performed by the comparison unit 83, and the longest downtime is set. Therefore, an appropriate downtime is selected. For example, in the technique of Patent Document 1, the heat storage levels of the power source and each motor are compared, and the downtime corresponding to the maximum heat storage level is set. For example, even if the power supply and each motor have the same heat storage level, the appropriate downtime for reducing the respective heat generation temperature to the release temperature with an appropriate temperature drop curve is the current value and heat dissipation coefficient flowing through the power supply and each motor. It is different from the difference. Further, since the heat storage level is determined based on the power source and the limit temperature of each motor, the reference is different between the power source and each motor, and the comparison of the heat storage level is only a comparison for determining the priority for putting a pause. On the other hand, in the present embodiment, when the heat generation temperature dTsum of the power source and each motor exceeds the threshold value dTmax, the pause time Wcr corresponding to the difference ΔdT is multiplied by the previous drive time TMcr of the carriage motor 25 to pause. Time TWMn is obtained. Then, an appropriate pause time TWMn suitable for each of the power supply device 40 and the motors 25, 31, 32 is obtained, and the longest of the pause times TWMn, TWP is set as the pause time TW. For this reason, it is possible to set one appropriate resting time TW obtained by collecting the necessary resting times TW of the power supply device 40 and the motors 25, 31, 32.

  (2) Only when each determination unit 75 to 78 determines that the heat generation temperature dTsum exceeds the threshold value dTmax, the pause time TW is calculated, and the longest of the calculated pause times TW is set as the pause time TW. To do. For this reason, since it is sufficient to perform the calculation only when the pause time is required, waste of calculating an unnecessary pause time can be eliminated.

  (3) The current value Ip of the power supply device 40 is estimated in consideration of the current flowing through the non-powered load group such as the display device 17 and the sensors 29, 48, and 49. For this reason, the accuracy of the heat generation temperature dTsumP of the power supply device 40 calculated based on the estimated current value Ip can be increased. Therefore, it is possible to improve the accuracy of the determination as to whether or not the power supply device 40 needs to be stopped and the accuracy of the required stop time TWP that is set when the determination is that the stop is required. As a result, it is possible to avoid as much as possible the inconvenience that the unnecessary heat generation restriction control is started or the start of the necessary heat restriction control is delayed due to the low accuracy of the heat generation temperature dTsumP of the power supply device 40. For this reason, the power supply device 40 can be used in a more appropriate temperature range.

  (4) According to the power consumption mode (normal mode, power saving mode, power off mode) managed by the mode management unit 60a for the current values of the non-powered load groups such as the display device 17 and the sensors 29, 48, 49 To estimate. For this reason, the heat generation temperature dTsumP of the power supply apparatus 40 calculated based on the estimated current value can be acquired with higher accuracy. Therefore, it is possible to improve the accuracy of determining whether or not the power supply device 40 needs to be stopped, and the accuracy of the stop time TWP when the stop is required.

  (5) When the respective heat generation temperatures dTsum of the motors 25, 31, 32 and the power supply device 40 exceed the respective threshold values dTmax, the suspension rates WMn, WP corresponding to the difference ΔdT (= dTsum−dTmax) WMn = An · ΔdT + Bn, calculated by the equation WP = C · ΔdT + D. For this reason, as the difference ΔdT at which the heat generation temperature dTsum exceeds the threshold value dTmax is larger, the suspension rate Wp is higher, and a longer suspension time TW can be set. Further, the pause time TW (seconds) at this time is calculated by multiplying the previous drive time TMcr (seconds) of the carriage motor 25 by the pause rate Wp (TW = TMcr · Wp). Therefore, since a more appropriate pause time TW according to the amount of heat generated by the previous drive of the carriage motor 25 can be set before the current drive of the carriage motor 25, each heat generation temperature dTsum follows an appropriate temperature drop curve. Can be lowered. For this reason, the period exceeding a limit temperature can be made comparatively short, and the power supply device 40 and each motor 25,31,32 can be used with appropriate heat generation temperature.

  (6) The current value IP of the power supply device 40 is acquired by summing up the current values of the load group, and the current values of the motors 25, 31, 32 are calculated from the duty ratio of the PWM signal for motor control. Therefore, the current sensor can be eliminated. Further, since the heat generation temperature dTsumMn is calculated from the current values of the motors 25, 31, 32, and the heat generation temperature dTsumP is calculated from the current value IP of the power supply device 40, a temperature sensor can be eliminated. Therefore, the number of detection system components in the printer 11 can be reduced, the configuration can be made relatively simple, and the manufacturing cost of the printer 11 can be kept relatively low.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The electronic apparatus according to the second embodiment is a composite printer 11 having a scanner function and a copy function in addition to a print function. For this reason, the printer 11 is provided with a scanner motor 36 that scans a reading head that reads a document. The computer 41 is provided with a scanner control unit (hereinafter referred to as “SC control unit 67”), and this SC control unit 67 is connected to the scanner motor 36 via a motor drive circuit 90. In this embodiment, in addition to the motors 25, 31, 32, the recording head 26 and the scanner motor 36 are each one of the actuators subject to heat generation restriction.

  As shown in FIG. 8, the heat generation restriction control unit 66 includes a head heat storage amount calculation unit 91, a head determination unit 92, a head pause time calculation unit 93 used for the heat generation restriction control of the recording head 26, and the heat generation restriction of the scanner motor 36. A scanner motor heat storage amount calculation unit (hereinafter referred to as “SC heat storage amount calculation unit 94”), a fourth determination unit 95, and a fourth downtime calculation unit 96 used for control are provided.

  The head heat storage amount calculation unit 91 is a method similar to the calculation method used when the heat storage amount calculation unit 74 in the first embodiment calculates a current value for each unit time (for example, 1 millisecond) of the recording head 26. The current value Ih for each hit is calculated. That is, the head heat storage amount calculation unit 91 calculates a head duty ratio (head operation rate information) per unit time (1 millisecond) based on the print image data and the ejection control data acquired from the head control unit 62. The head heat storage amount calculation unit 91 calculates the head current value Ih per unit time by multiplying the maximum head current value Ihmax by the head duty ratio Hd. The head heat storage amount calculation unit 91 calculates an effective current value for 60 seconds based on the calculated head current value per unit time Ih, and further calculates a heat generation temperature dTsumH based on the effective current value.

  The head determination unit 92 determines whether the heat generation temperature dTsumH of the recording head 26 exceeds the first threshold value dTmaxH. Further, the head pause time calculation unit 93 calculates the head pause time TWH when the head determination unit 92 determines that the heat generation temperature dTsumH exceeds the threshold value dTmaxH. The head pause time TWH is sent to the comparison unit 83.

  The SC heat storage amount calculation unit 94 calculates a motor current value IM4 per unit time (for example, 1 millisecond) based on the duty ratio of the PWM signal acquired from the SC control unit 67. Then, the SC heat storage amount calculation unit 94 calculates an effective current value for 60 seconds based on the calculated motor current value IM4, and further calculates a heat generation temperature dTsumM4 based on the effective current value.

  The fourth determination unit 95 determines whether or not the heat generation temperature dTsumM4 of the scanner motor 36 exceeds the fourth threshold value dTmaxM4. In addition, when the fourth determination unit 95 determines that the heat generation temperature dTsumM4 exceeds the threshold value dTmaxM4, the fourth stop time calculation unit 96 calculates the motor stop time TWM4. The motor downtime TWM4 is sent to the comparison unit 83.

  The power storage amount calculation unit 74 calculates the head current value Ih per unit time based on the head control data and the ejection control data acquired from the head control unit 62 by the same method as in the first embodiment. Of course, the head current value Ih calculated by the head heat storage amount calculation unit 91 may be acquired from the head heat storage amount calculation unit 91. Similarly to the first embodiment, the power source heat storage amount calculation unit 74 is based on the duty ratio of the PWM signal used for control of each of the control units 63 to 65, 67, where the motor current value IMn (where n = 1, 2,3,4) is calculated. The power storage amount calculation unit 74 calculates the sum of the head current value Ih, the motor current value IMn (where n = 1, 2, 3, 4) and the current value Ind applied to the load group of the non-power system. This is the current value IP of the power supply device 40. Furthermore, the power storage amount calculation unit 74 calculates the effective current value Ie every 60 seconds based on the current value IP per unit time (1 millisecond), and further calculates the heat generation amount based on the effective current value Ie, Further, the heat generation temperature dTsumP is calculated from the heat generation amount.

  Then, the power supply determination unit 78 determines whether or not the heat generation temperature dTsumP of the power supply device 40 exceeds the threshold value dTmaxP. When the power generation determination unit 78 determines that the heat generation temperature dTsumP exceeds the threshold value dTmaxP, the head suspension time calculation unit 93 calculates the head suspension time TWH. The head pause time TWH is sent to the comparison unit 83.

  Therefore, the comparison unit 83 inputs a total of six pause times, that is, the head pause time TWH, the motor pause time TWMn (where n = 1, 2, 3, 4) and the power pause time TWP. The comparison unit 83 compares the pause times TWH and TWMn (where n = 1, 2, 3, and 4) as in the first embodiment, and drives the carriage motor 25 with the longest pause time TW. Set before.

According to the second embodiment, the following effects can be obtained in addition to the same or similar effects as the effects (1) to (6) in the first embodiment.
(7) The heating temperature is also calculated for the recording head 26 and the scanner motor 36, and a plurality of pause times including the pause times calculated when each heating temperature exceeds a threshold value are compared by the comparison unit 83, and the longest of them is calculated. A pause time is set before the carriage motor 25 is driven. For this reason, the heat generation restriction control can also be performed for the recording head 26 and the scanner motor 36. Further, since the current of the power supply device 40 is appropriately calculated as the sum of the current values of the currents flowing through the recording head 26, the motors 25, 31, 32, and 36 and the non-powered load group, the power supply device 40 is overheated. Can be suppressed as much as possible.

In addition, the said embodiment can also be changed into the following forms.
In each of the above embodiments, the current value IP of the current flowing through the power supply device 40 may be measured by a current sensor.

  -When exothermic temperature dTsum which is an example of heat storage information does not exceed a threshold value, it may be set as no stop and the calculation of a stop rate and a stop time may be omitted. In this case, only when there are a plurality of heat generation temperatures dTsum calculated when the heat generation temperature dTsum exceeds the threshold value, the comparison unit 83 may determine the longest one and set it in the pause time setting unit 84. .

  -There may not be a judgment part. For example, a table indicating a correspondence relationship between the heat generation temperature dTsum and the pause time as an example of the heat storage information may be stored in a memory, and the pause time may be acquired by referring to the table based on the heat generation temperature dTsum. In this case, “0” may be set in the rest time corresponding to the heat generation temperature dTsum less than the threshold in the table.

  When calculating the rest time based on the heat storage information (for example, the heat generation temperature dTsum), refer to the table showing the correspondence between the heat generation temperature dTsum and the suspension rate Wp stored in the nonvolatile memory 54, and calculate the heat generation temperature dTsum. The corresponding pause rate Wp may be acquired, and the acquired pause rate Wp may be multiplied by the previous carriage drive time TMcr to obtain the pause time TW. In this case, with respect to the heat generation temperature dTsum exceeding the threshold value, it is desirable to create a table so that a higher pause rate Wp is selected as the difference between the heat generation temperature dTsum and the threshold value is larger.

  A configuration in which a plurality of threshold values are set and the suspension rate Wp corresponding to the maximum threshold value that the heat generation temperature dTsum exceeds among the plurality of threshold values can be set. Moreover, the structure which sets the idle time TW according to the largest threshold value in which the heat_generation | fever temperature dTsum exceeded among several threshold values is also employable.

-The pause time may be a constant value regardless of the previous drive time of the actuator.
-The rest time may be set at least one of before and after the actuator is driven. For example, the pause time may be set after the carriage motor is driven, or for example, half of the pause time required before and after the carriage motor is driven may be set.

  The actuator that sets the pause time at least one of before and after driving is not limited to the carriage motor 25 but may be the transport motor 32. Alternatively, a pause time may be set for a plurality of actuators, and the required pauses may be distributed among the actuators. For example, in the first embodiment, a pause time may be set for both the carriage motor 25 and the transport motor 32. Furthermore, in the second embodiment, an actuator for setting a pause time may be switched between printing, scanning, and copying. For example, a pause time is set for at least one of the carriage motor 25 and the conveyance motor 32 during printing, a pause time is set for the scanner motor 36 during scanning, and the carriage motor 25, the conveyance motor 32, and the scanner motor 36 are set during copying. At least one of them is set with a pause time. In addition, in the configuration in which the pause time is set for at least one of the carriage motor 25 and the transport motor 32, the pause may be dispersed by setting the pause time for the feeding motor 31.

  The mode management unit 60a manages whether or not a USB device such as a USB memory UM is connected to the USB I / F 47a in the USB mode, and manages whether or not the memory card MC is connected to the card I / F 47b in the MC mode. . When calculating the current of the non-powered load group including the USB I / F 47a and the card I / F 47b, the current values of the USB I / F 47a and the card I / F 47b are calculated based on the USB mode and the MC mode. May also be calculated.

  -The threshold value is not limited to setting near the limit temperature, but it is set to be considerably lower than the limit temperature, and the heat generation limit control is performed so that the actuator and power supply can be used in a temperature range that does not exceed each limit temperature. Can also be adopted.

  In each of the above embodiments, the electronic apparatus is embodied in an ink jet printer that is one of the liquid ejecting apparatuses. However, when applied to the liquid ejecting apparatus, the electronic apparatus is not limited to the printer, and other liquids and functions other than ink It is also possible to embody the invention in a liquid ejecting apparatus that ejects or ejects a liquid material in which particles of material are dispersed or mixed in a liquid, or a fluid material such as a gel. For example, even in a liquid ejecting apparatus that ejects a liquid material that contains materials such as electrode materials and color materials (pixel materials) used in the manufacture of liquid crystal displays, EL (electroluminescence) displays, and surface-emitting displays in a dispersed or dissolved state. Good. Further, it may be a liquid ejecting apparatus that ejects a bio-organic material used for biochip manufacture, or a liquid ejecting apparatus that ejects a liquid that is used as a precision pipette and serves as a sample. Furthermore, a liquid ejecting apparatus that ejects a transparent resin liquid such as a thermosetting resin onto a substrate to form a micro hemispherical lens (optical lens) used for an optical communication element or the like, an acid or an alkali to etch the substrate, etc. The liquid injection apparatus which injects etching liquids, such as a fluid body injection apparatus which injects fluid bodies, such as gel (for example, physical gel), may be sufficient. The present invention can be applied to any one of these fluid ejecting apparatuses. As described above, the medium (recording medium) may be a substrate on which elements, wirings, and the like are formed by inkjet. The “liquid” ejected by the liquid ejecting apparatus includes a liquid (including an inorganic solvent, an organic solvent, a solution, a liquid resin, a liquid metal (metal melt), etc.), a liquid, a fluid, and the like.

  The recording head 26 is not limited to the ink jet recording method, and may be a dot impact recording method. The recording apparatus is not limited to a serial printer, and may be a line printer. When the electronic device is a printer, the medium is not limited to paper, and may be a resin film, a metal foil, a metal film, a resin-metal composite film (laminate film), a woven fabric, a nonwoven fabric, a ceramic sheet, or the like. May be. Further, the medium is not limited to a sheet shape and may be a three-dimensional object.

  -Electronic devices are not limited to printers and multifunction devices. An electronic device including one or more actuators and a power supply device (power source) that supplies power to the actuators is sufficient. This is particularly effective for an electronic device having a configuration in which at least one of the actuators is driven so as to repeatedly move or displace the object to be driven during the operation of the electronic device. For example, a scanner may be used. Furthermore, in order to mount an electronic component on a semiconductor chip or a substrate, a component mounting apparatus that causes a gripping portion that grips the electronic component to perform an operation for mounting, grips a transport object such as a semiconductor chip, a wafer, or a substrate, It may be a transfer device provided with a gripper that moves along the transfer path to the transfer destination. In these cases, heat generation restriction control of the actuator and the power supply device (power supply) can be performed by waiting for a pause time before driving the actuator that is repeatedly driven.

  The actuator is not limited to an electric motor and a recording head (jet driving element such as a piezoelectric element). A solenoid, a piezoelectric actuator, an electric cylinder, etc. may be used. The electric motor may be an ultrasonic motor. Furthermore, the electric motor is not limited to a rotary type, and may be a direct acting linear motor. As described above, the actuator according to the present embodiment refers to an actuator that is driven so as to move an object by supplied electric power or that is pushed out by applying pressure to the object (including liquid ejection).

  DESCRIPTION OF SYMBOLS 11 ... Printer which is an example of an electronic device, 16 ... Operation part, 17 ... Display apparatus which is an example of non-power system load, 18 ... USB port, 19 ... Card slot, 22 ... Carriage, 25 ... Actuator for heat generation restriction And a carriage motor as an example of an electric motor, 26... A recording head as an example of an actuator subject to heat generation restriction, 29... A sensor (linear encoder) as an example of a non-power system load, 31. A feeding motor as an example of a motor, 32... A transport motor as an example of an actuator and an electric motor subject to heat restriction, 36... A scanner motor as an example of an actuator and electric motor subject to a heat restriction, 40. Power supply, 48 ... Non-powered load Paper detection sensor which is an example of a sensor, 49... Non-powered load and a rotary encoder which is an example of a sensor, 51... CPU, 52. 60a: Mode management unit 61: Display control unit 62: Head control unit 63: CR control unit as an example of control unit 64: ASF control unit 65: PF control unit 66: Heat generation restriction control unit 67 ... SC control part, 71 ... CR heat storage amount calculation part as an example of the first heat storage calculation part, 72 ... ASF heat storage amount calculation part as an example of the first heat storage calculation part, 73 ... of the first heat storage calculation part PF heat storage amount calculation unit as an example, 74... Power source heat storage amount calculation unit as an example of a second heat storage calculation unit, 75... First determination unit as an example of a first determination unit, 76. Second as an example A determination unit, 77 ... a third determination unit as an example of a first determination unit, 78 ... a power supply determination unit as an example of a second determination unit, 79 ... a first pause as an example of a first pause time calculation unit Time calculation unit, 80... Second pause time calculation unit as an example of first pause time calculation unit, 81... Third pause time calculation unit as an example of first pause time calculation unit, 82. Power supply pause time calculation unit as an example of a time calculation unit, 83... Comparison unit constituting an example of a setting unit, 84... Quiet time setting unit constituting an example of a setting unit, 91. A head determining unit as an example of one determining unit, 93... A head resting time determining unit, 95... A fourth determining unit as an example of a first determining unit, and 96 a second example as an example of a first resting time calculating unit. 4 pause time calculation unit, IMn motor current, IP power supply current, dTsumMn The heat generation temperature of the motor, which is an example of the first heat storage information, dTsumP, the heat generation temperature of the power supply device, which is an example of the second heat storage information, dTmaxMn, the threshold value as an example of the first threshold, dTmaxP, ... , DTsumH... Print head heat generation temperature as an example of first heat storage information, dTmaxH... Threshold value as an example of first threshold, P... Paper as an example of medium.

Claims (10)

A heat generation restriction control device in an electronic device that restricts heat generation between at least one of one or more actuators provided in the electronic device and a power source, and
A first heat storage calculation unit that calculates first heat storage information related to the amount of heat stored in the actuator based on the current value of the actuator subject to heat generation restriction;
A second heat storage calculation unit that calculates second heat storage information related to the heat storage amount of the power source based on the current value of the power source;
A first downtime calculator that calculates a first downtime based on the first heat storage information;
A second downtime calculator that calculates a second downtime based on the second heat storage information;
A setting unit for setting the longest one of the first pause time and the second pause time as a pause time;
A control unit for controlling at least one of the actuators so that the pause time is paused between drivings;
A heat generation restriction control device for an electronic device, comprising: A first determination unit that determines whether or not the first heat storage information exceeds a first threshold;
A second determination unit that determines whether or not the second heat storage information exceeds a second threshold;
The control unit puts a pause of the pause time set by the setting unit between driving when at least one of the decision units determines that the heat storage information exceeds a corresponding threshold value 2. The heat generation restriction control device for an electronic device according to claim 1, wherein at least one of the actuators is controlled as described above.   The said 2nd heat storage calculating part calculates said 2nd heat storage information based on the electric current which flows through the at least 1 load containing the said actuator of the electric power feeding destination of the said power supply, It is characterized by the above-mentioned. Heat limit control device for electronic equipment. The electronic device includes a non-powered load including at least one of a display device and a sensor as a power supply destination of the power source,
The current used when the second heat storage calculation unit calculates the second heat storage information includes a current flowing through a load of the non-power system. The heat generation | occurrence | production restriction | limiting control apparatus in the electronic device of description. Consumption including the power saving mode and the normal mode in which the power output from the power supply is stopped or lower than the power in the normal mode when the operation of the actuator and the operation of the operation unit have not been performed for a certain time or more A mode management unit for managing the power mode;
5. The heat generation restriction control device for an electronic device according to claim 4, wherein the second heat storage calculation unit calculates a current value of a load of the non-power system based on the power consumption mode.   At least one of the first downtime calculation unit and the second downtime calculation unit calculates the downtime so that the longer the difference between the heat storage information and the threshold value, the longer the downtime. The heat generation | occurrence | production restriction | limiting control apparatus in the electronic device as described in any one of Claims 2 thru | or 5. The electronic apparatus is a recording apparatus including one or more electric motors and a recording head as the actuator.
The current value used by the second heat storage calculation unit for calculating the second heat storage information includes a current value of the recording head. Heat limit control device for electronic equipment.   8. The heat generation restriction control device for an electronic apparatus according to claim 7, wherein the second heat storage calculation unit calculates a current value of the recording head based on head operating rate information regarding an operating rate of the recording head. . One or more actuators;
A power source for supplying power to the actuator;
The heat generation restriction control device according to any one of claims 1 to 8,
An electronic device characterized by comprising: A heat generation restriction control method in an electronic device for restricting heat generation between at least one of the one or more actuators provided in the electronic device and a power supply restriction target,
A first heat storage calculation step of calculating first heat storage information related to a heat storage amount of the actuator based on a current value of the actuator subject to heat generation restriction;
A second heat storage calculation step of calculating second heat storage information related to the heat storage amount of the power source based on the current value of the power source;
A first downtime calculating step of calculating a first downtime based on the first heat storage information;
A second downtime calculation step of calculating a second downtime based on the second heat storage information;
A setting step of setting the longest of the first pause time and the second pause time as a pause time;
A control step for controlling at least one of the actuators to pause the pause time between drivings;
A heat generation restriction control method for an electronic device, comprising: