JP2005287253A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize motor control capable of more efficiently rotating a motor within such a range that motor temperature may not exceed an upper limit. <P>SOLUTION: After an automatic sheet feed operation is performed for recording sheets P (step S61), temperature which a thermistor 621 detects for detecting the temperature of a recording head 62 is obtained as "usage environment temperature" (step S62). It is judged whether or not a temperature obtained from the thermistor 621 is ≤ 40° set as a "mode boundary temperature" which is set in the usage environment temperature range in which the operation of an ink jet type recording device 50 is assured (step S63). If the temperature is ≤ 40° (Yes in the step S63), the temperature control mode is set at an ordinary temperature mode (step S64), and if it exceeds 40° (No in the step S63), the temperature control mode is set at a high temperature mode (step S65), and recording to a recorded value P is performed (step S66). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to motor control for controlling a motor so that the motor is not overheated.

  Many general electronic devices are equipped with a motor such as a DC motor as a driving force source. However, while the motor is continuously driven, the motor temperature rises due to the heat generated by the motor itself. If the motor is continuously driven over a long period of time, the temperature of the motor will continue to rise and become overheated, and the motor may fail. Therefore, it is necessary to execute motor control so that the motor does not become overheated. For example, it is possible to prevent the motor from being overheated by providing a temperature sensor or the like that directly detects the motor temperature and controlling the motor temperature so as not to exceed the upper limit temperature. In addition, there is a problem that the cost increases due to the provision of the temperature sensor. As an example of the prior art that solves such a problem, for example, a heat generation amount of a motor is estimated based on a motor current value without providing a temperature sensor that directly detects the motor temperature, and based on the estimated heat generation amount of the motor. A motor control method for controlling the motor by setting a pause time so that the motor temperature is maintained below a predetermined upper limit temperature is known (see, for example, Patent Document 1 or Patent Document 2).

JP 2003-79179 A JP 2003-159857 A

  However, the conventional electronic devices generally do not have a means for detecting the operating environment temperature, and the operation of the electronic device in the operating environment temperature range in which the operation is guaranteed in the specifications without knowing the operating environment temperature. Therefore, the motor control based on the upper limit temperature of the use environment temperature range, which is the worst temperature environment for the motor in the use environment temperature range, has been performed. In other words, the difference between the operating environment temperature and the upper limit temperature of the motor is the smallest in the operating environment temperature range where operation is guaranteed by the specifications, and motor control based on the operating environment temperature that is the most severe environmental temperature condition in motor temperature control It had been. Therefore, when the motor is used in a normal temperature environment, it is determined that the motor temperature has risen to near the upper limit temperature even though the motor temperature is sufficiently lower than the upper limit temperature, and the motor is forced to be stopped. May be set, which may reduce the throughput of the electronic device.

  Also, in recent years, with the diversification of the usage environment of electronic devices (mobile environments and sealed space environments where the temperature is high, such as audio racks), it is becoming necessary to guarantee the operation of electronic devices at higher usage environment temperatures. As a result, the motor control based on a higher usage environment temperature is performed, which may further reduce the throughput of the electronic device. As an example of means for easily solving the above-described problem, simply providing a large motor having a sufficiently high torque performance and specifications can be cited. Since the amount of heat generated by the motor when obtaining the same driving force as a small motor is reduced, it is possible to rotate the motor continuously for a long time without worrying about the temperature rise of the motor. Throughput can be improved. However, this naturally causes a problem that the cost of the electronic device is significantly increased.

  The present invention has been made in view of such a situation, and the problem is to realize motor control capable of rotating the motor more efficiently within a range where the motor temperature does not exceed the upper limit temperature. is there.

  In order to achieve the above object, the first aspect of the present invention estimates the heat generation amount of the motor based on the motor, the environmental temperature detection means for detecting the use environment temperature, and the power consumption of the motor. Motor control for controlling the motor by setting a pause time based on the amount of heat generated by the motor and the environmental temperature detected by the environmental temperature detection means so that the temperature of the motor is maintained below a predetermined upper limit temperature. And a control device having means.

  The motor temperature before the rotation control is substantially the same as the environmental temperature detected by the environmental temperature detecting means. Therefore, the temperature rise of the motor due to the heat generated by controlling the rotation of the motor is allowed only by the temperature difference between the predetermined upper limit temperature set as the upper limit temperature of the motor temperature and the environmental temperature detected by the environmental temperature detecting means. Will be. If the use environment temperature is low, the allowable temperature increase range becomes wide. Conversely, if the use environment temperature is high, the allowable temperature increase range becomes narrow. Therefore, when controlling the motor by setting a pause time so that the temperature of the motor is maintained below a predetermined upper limit temperature based on the heat generation amount of the motor estimated from the current consumption of the motor, the environmental temperature detecting means Motor control is executed based on the detected use environment temperature. Conventionally, the upper limit value of the operating environment temperature range for which operation is guaranteed in the specifications was fixed as the operating environment temperature, so that the allowable temperature rise range of the motor that was set to a certain narrowest temperature range, As described above, it is possible to perform motor control by setting a realistic temperature range that varies according to the use environment temperature. As a result, it is possible to obtain an operational effect that the motor can be more efficiently rotated in a range where the motor temperature does not exceed the upper limit temperature.

  According to a second aspect of the present invention, the amount of heat generated by the motor is estimated on the basis of the motor, the environment temperature detecting means for detecting the use environment temperature, and the accumulated rotation amount obtained by accumulating the rotation amount of the motor. Motor control means for controlling the motor by setting a pause time so that the temperature of the motor is maintained below a predetermined upper limit temperature based on the amount of heat generated by the motor and the environmental temperature detected by the environmental temperature detection means. And an electronic device including the control device.

  When controlling the motor by setting a pause time so that the temperature of the motor is maintained below a predetermined upper limit temperature based on the heat generation amount of the motor estimated based on the cumulative rotation amount obtained by accumulating the motor rotation amount, As in the first mode, the motor control is executed based on the use environment temperature detected by the environment temperature detection means. Conventionally, the upper limit value of the operating environment temperature range for which operation is guaranteed in the specifications was fixed as the operating environment temperature, so that the allowable temperature rise range of the motor that was set to a certain narrowest temperature range, As described above, the motor can be controlled by setting a realistic temperature range that varies according to the use environment temperature. As a result, it is possible to obtain an operational effect that the motor can be more efficiently rotated in a range where the motor temperature does not exceed the upper limit temperature.

  According to a third aspect of the present invention, in the first aspect or the second aspect described above, the motor control means ensures that the operating environment temperature detected by the environmental temperature detection means is the operation of the electronic device. A first temperature control mode that is selected when the temperature is equal to or lower than a mode boundary temperature set to a predetermined temperature in the operating environment temperature range; and the operating environment temperature detected by the environmental temperature detecting means exceeds the mode boundary temperature. A second temperature control mode that is selected when the first temperature control mode is selected, the mode boundary temperature is set as the use environment temperature in the first temperature control mode, and the operation of the electronic device is performed in the second temperature control mode. The temperature control constant set in advance for each temperature control mode is selected according to the temperature control mode, with the upper limit value of the operating environment temperature range in which the It was an electronic device.

  As described above, the temperature control mode is switched depending on whether or not the use environment temperature detected by the environment temperature detection means is equal to or lower than the mode boundary temperature, and a constant (temperature control constant) used for temperature control according to the switching of the temperature control mode. ) Is selected, and motor control is executed with the selected temperature control constant. As a result, it is not necessary to calculate the temperature control constant each time according to the operating environment temperature, so that the increase in the motor control processing load due to maintaining the motor temperature below the predetermined upper limit temperature is minimized. It becomes possible to rotate the motor more efficiently as long as the temperature does not exceed the upper limit temperature. For example, in an electronic device that guarantees operation even at a high environmental temperature exceeding 50 °, the upper limit value (about 35 to 40 °) of the operating environmental temperature range that guarantees the operation of a general electronic device is set. As the mode boundary temperature, it is efficient and preferable to set the temperature control constant with the first temperature control mode as a mode corresponding to a general use environment and the second temperature control mode as a mode corresponding to a high temperature use environment. I can say that.

  According to a fourth aspect of the present invention, in the third aspect described above, main scanning driving means for reciprocating a recording head for ejecting ink onto the recording material in the main scanning direction, and the recording material in the sub-scanning direction are predetermined. And a sub-scanning drive unit that transports the recording head by a transport amount, and the control device controls the recording head, the main scanning driving unit, and the sub-scanning driving unit to perform recording on a recording material. The electronic apparatus includes a control unit, and the environmental temperature detection unit is a head temperature detection unit that detects a temperature of the recording head disposed in the recording head.

  In an electronic apparatus such as an ink jet printer provided with means for executing recording on a recording material, the temperature of the recording head rises when ink is continuously ejected from the recording head, and a certain limit temperature is reached. If the value exceeds 1, there is a possibility that an abnormality will occur in the recording head. Therefore, for the purpose of executing recording so that the temperature of the recording head does not exceed the limit temperature, there are some in which a means for detecting the temperature of the recording head such as a thermistor is provided in the recording head. Since the heat generation amount of the recording head itself is small, the temperature of the recording head changes according to the use environment temperature. Therefore, the temperature difference between the print head temperature and the use environment temperature is small enough to be ignored. That is, the temperature of the recording head and the use environment temperature are substantially the same. Therefore, the temperature of the use environment of the electronic device is detected by utilizing means for detecting the temperature of the print head that is originally provided for protecting the print head. Accordingly, the motor control can be executed based on the use environment temperature without newly providing a means for detecting the use environment temperature. Therefore, it is possible to obtain an operational effect that it is possible to rotate the motor more efficiently within a range where the motor temperature does not exceed the upper limit temperature.

  According to a fifth aspect of the present invention, in the fourth aspect described above, an automatic paper feeding device that automatically feeds a recording paper as a recording material to the sub-scanning driving means is provided, and the motor control means includes the automatic feeding device. The electronic apparatus is characterized in that a temperature control mode is set in accordance with a temperature detected by the environmental temperature detecting means during an automatic paper feeding operation by a paper feeding device. Since it is very unlikely that the operating environment temperature will change suddenly, an electronic device equipped with an automatic paper feeding device that automatically feeds recording paper as a recording material to the sub-scanning drive means in this way. An appropriate temperature control mode can be set by setting the temperature control mode according to the use environment temperature at the timing when the paper is automatically fed.

A sixth aspect of the present invention is the electronic apparatus according to the fourth aspect or the fifth aspect described above, wherein the motor is a driving force source of the main scanning driving means.
A motor serving as a driving force source for main scanning driving means for reciprocating a recording head for ejecting ink onto a recording material in the main scanning direction has a heavy load on the motor and performs recording on a single recording material. Since the ratio of the time during which the motor rotates is high, the amount of heat generated by the motor is generally large. Therefore, it is possible to rotate the motor, which is the driving force source of the main scanning drive means, more efficiently as long as the motor temperature does not exceed the upper limit temperature, thereby greatly improving the throughput when recording on the recording material. Can be made.

  According to a seventh aspect of the present invention, in the sixth aspect described above, the motor control means controls the temperature according to the temperature detected by the environmental temperature detection means each time the main scanning operation is performed by the main scanning driving means. The electronic device is characterized by setting a mode. In this way, by setting the temperature control mode according to the temperature detected by the environmental temperature detection means for each main scanning operation, the control for rotating the motor more efficiently within the range where the motor temperature does not exceed the upper limit temperature. Can be performed with higher accuracy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the ink jet recording apparatus, and FIG. 2 is a perspective view of the ink jet recording apparatus with the main body cover removed. FIG. 3 is a schematic side sectional view of the ink jet recording apparatus. FIG. 4 is a block diagram of a control unit that performs various controls of the ink jet recording apparatus.

  First, a schematic configuration of an ink jet recording apparatus (ink jet printer) 50 as an “electronic device” according to the present invention will be described with reference to FIGS. The ink jet recording apparatus 50 has a box-like appearance, is formed to be as large as a video tape recorder, and is assumed to be used in a state of being stored in an audio rack, a TV rack, or the like. It has a configuration. A front cover 2 that can be opened and closed in front is provided at the front center of the box-shaped body cover 1. From the opening of the front cover 2 that opens to the front, When the recording paper P as the “recording material” is discharged and recording is performed on the label surface of the optical recording disc D such as a DVD, the optical recording disc as the “recording material” mounted on the disc tray 7 The disc tray 7 temporarily protrudes from the inside of the ink jet recording apparatus 50 during execution of recording on D. Further, the front cover 2 serves as a stacker for stacking recording sheets P discharged after recording is performed with the front cover 2 opened to the front side. A paper feed cassette 8 as a “recording paper storage unit” for stacking the recording papers P is provided below the front cover 2, and recording is performed in the paper feeding cassette 8 while being pulled out to the front side. Paper P can be stacked. An openable / closable cover 3 is provided above the front cover 2, and an ink cartridge unit 15 is provided in the openable / closable cover 3. In the ink cartridge unit 15, a plurality of ink cartridges 16 (see FIG. 3) filled with ink are detachably arranged side by side in the width direction of the ink jet recording apparatus 50, and the open / close cover 3 is opened. The ink cartridge 16 can be replaced. On the left side of the front cover 2, a memory slot cover 4 having a memory slot to which a flash memory card and the like can be attached and detached is disposed. Further, a remote control light receiver 6 that receives a control signal from a remote control 120 as a “remote control device” is disposed below the memory slot cover 4.

  Next, an outline of the internal configuration of the ink jet recording apparatus 50 will be described with reference to FIG. The base of the ink jet recording apparatus 50 includes a lower chassis 13, a main frame 11 extending in the width direction of the main body of the ink jet recording apparatus 50, and a depth direction of the main body of the ink jet recording apparatus 50 disposed on both sides of the main frame 11. The side frame right 12 and the side frame left 14 are parallel to each other. Between the right side frame 12 and the left side frame 14, a carriage guide shaft 51 and a sub carriage guide shaft 511 are pivotally supported at a predetermined interval in the sub scanning direction Y in parallel with the main scanning direction X. . The carriage guide shaft 51 and the sub-carriage guide shaft 511 are guide shafts for supporting the carriage 61 on which the recording head 62 for ejecting ink onto the recording paper P is mounted so as to be able to reciprocate in the main scanning direction X. 51, the rear portion of the carriage 61 is inserted, and the sub-carriage guide shaft 511 supports the front portion of the carriage 61 from below, thereby the recording head 62 (FIG. 3) mounted on the carriage 61 and the recording head 62. The carriage 61 is supported so as to be able to reciprocate in the main scanning direction X in a state where a distance between the head surface and the recording paper P facing the platen gap (platen gap: hereinafter referred to as “PG”) is defined.

Next, the conveyance path of the recording paper P as the “recording material” and the disc tray 7 will be described with reference to FIGS.
An “automatic paper feeder” that automatically feeds recording paper P one by one as a recording material toward a “sub-scanning drive unit” described later includes a paper feed cassette 8 and a paper feed roller 83. A hopper 81 is provided at the bottom of the paper feed cassette 8 on which a plurality of recording papers P are stacked. The hopper 81 is disposed so as to be swingable with a shaft 82 as a swing shaft. By pushing up the recording paper P stacked on the hopper 81 from below, recording is performed on a paper feed roller 83 provided on the top. Press the paper P. The paper feed roller 83 has a substantially D shape when viewed from the side, and the outer periphery is formed of a high friction member (for example, a rubber material). When the recording paper P is fed, the uppermost recording paper P in contact with the arc portion of the paper feeding roller 83 is fed in the sub-scanning direction Y by the rotation of the paper feeding roller 83. The “automatic paper feeder” is disposed below the paper feed roller 83, and the recording paper P whose surface is pressed against the outer peripheral surface of the paper feed roller 83 by the hopper 81 is fed by the drive rotation of the paper feed roller 83. A separation pad (not shown) is provided as a “separation unit” that prevents another recording paper P from being overlapped when fed in the paper direction (sub-scanning direction Y). . By feeding the recording paper P while rotating the paper feeding roller 83 with the recording paper P sandwiched between the separation pad and the paper feeding roller 83, the recording paper P to be fed and the other are about to be fed. The recording paper P is separated. Further, the “automatic paper feeder” pushes back the recording paper P partially protruding out of the paper feeding cassette 8 on which the recording paper P separated by the separation pad is stacked, into the paper feeding cassette 8. In addition, the recording paper P partially protruding outside the paper feed cassette 8 is disposed under the paper feed roller 83 so as to be able to advance into the paper feed path so as to be pushed toward the paper feed cassette 8. A paper return lever (not shown) is provided.

  On the downstream side of the paper feed roller 83 in the sub-scanning direction Y, a conveyance drive roller 53 having a high frictional resistance film uniformly applied to the outer peripheral surface, and can be driven to rotate while being pressed and urged by the conveyance drive roller 53. A conveyance driven roller 54 that is pivotally supported by the PF motor 57 as a “conveyance drive motor” that drives the conveyance drive roller 53 and a “rotation” that detects the rotation amount of the conveyance drive roller 53. The rotary encoder 31 as “amount detection means” constitutes “sub-scanning drive means” for transporting the recording paper P or the disc tray 7 in the sub-scanning direction Y by a predetermined transport amount. The “sub-scanning driving means” sandwiches the recording paper P or the disk tray 7 between the transport driving roller 53 and the transport driven roller 54, and the rotational driving force of the PF motor 57 is transmitted to the pulley 59 via the endless belt 58. The recording paper P or the disk tray 7 is transported in the sub-scanning direction Y by the rotation of the transport driving roller 53 that is driven and rotated by the rotation of the pulley 59 transmitted through an intermediate gear (not shown). Then, the rotation amount of the PF motor 57 is described later according to the rotation amount of the conveyance drive roller 53 detected by the rotary encoder 31 so that the recording paper P or the disc tray 7 is conveyed by a predetermined conveyance amount. 100.

  A platen 52 is disposed on the downstream side of the transport driving roller 53 in the sub-scanning direction Y so as to face the head surface of the recording head 62 in the vertical direction. The recording paper P or the disc tray 7 conveyed by the above-mentioned “sub-scanning driving means” is supported by the platen 52 from below, and the recording head 62 reciprocates in the main scanning direction X by the “main scanning driving means”. Recording is performed by ejecting ink from the ink. The “main scanning driving means” has a CR motor 63 as a “carriage driving motor” serving as a driving force source for reciprocating the carriage 61, and the rotational driving force of the CR motor 63 is not shown. The rotary motion is converted into a linear reciprocating motion and transmitted to the carriage 61 via a driving force transmission mechanism such as an endless belt. In this embodiment, the recording head 62 is provided at the bottom of the carriage 61, but no ink cartridge is mounted on the carriage 61 that reciprocates in the main scanning direction X, and the ink cartridge unit 15 described above. Ink is supplied to the carriage 61 through the flexible collecting tube 17 from the plurality of ink cartridges 16 stored in the printer. In the flexible collecting tube 17, independent ink supply paths are formed inside as many as the number of ink cartridges 16. The ink in each ink cartridge 16 is pressurized by a pump or the like (not shown) and supplied individually to the recording head 62 via the flexible collecting tube 17.

  On the downstream side of the recording head 62 in the sub-scanning direction Y, the rotational driving force of the PF motor 57 is transmitted and rotated to be driven, and the paper driving roller 55 can be driven and rotated while being urged by the paper discharging drive roller 55. A paper discharge driven roller 56 supported on the shaft is disposed. The recording paper P during and after recording is sandwiched between the paper discharge driving roller 55 and the paper discharge driven roller 56, and the rotational driving force of the PF motor 57 is transmitted to the pulley 59 via the endless belt 58. The rotation of 59 is transmitted through an intermediate gear (not shown) and the like, and is discharged from the opening in the state where the front panel 2 is opened in the sub-scanning direction Y by the rotation of the discharge driving roller 55 that rotates. A disc tray 7 on which the optical recording disc D can be mounted is disposed above the paper feed cassette 8. The disc tray 7 has a rack 71 (see FIG. 2) formed on the side end thereof, and is arranged so as to be able to move straightly in a substantially horizontal posture by rotation of a pinion gear (not shown) that meshes with the rack 71. ing. Then, after the disk tray 7 is conveyed until the leading end is nipped by the conveyance drive roller 53 and the conveyance driven roller 54 by the rotation of the pinion gear, the conveyance drive roller 53 is rotated in both directions thereafter. It is sent in the sub-scanning direction Y or the reverse feed direction YR. Further, when the optical recording disk D is attached to or detached from the disk tray 7, the optical recording disk D is transported in the sub-scanning direction Y to a position protruding from the opening where the front panel 2 is opened (a position indicated by a virtual line in FIG. 2).

Next, the configuration of the recording control unit 100 will be described with reference to FIG.
A recording control unit 100 as a “control device” having a main control function of the ink jet recording apparatus 50 is connected to a host computer 200 that transmits recording control data to the ink jet recording apparatus 50 so as to be able to transmit and receive data. The recording control unit 100 includes a ROM 101, a RAM 102, an interface unit 103, an MPU 104, a DC unit 105, a PF motor driver 106, a CR motor driver 107, a head driver 108, and a nonvolatile memory (EEPROM) 109. The MPU 104 and the DC unit 105 include a rotary encoder 31 that detects the amount of rotation of the transport drive roller 53, a linear encoder 32 that detects the amount of movement of the carriage 61, and a paper detector that detects the start and end of the transported recording paper P. 33, a PW sensor 34 for detecting the width of the recording paper P mounted on the carriage 61 in the main scanning direction X, a power switch 35 for turning on / off the power of the ink jet recording apparatus 50, and an operation for inserting / removing the disc tray 7 The output signal of the tray switch 36 for performing the above is input. In this embodiment, the PW sensor 34 is an optical sensor provided at the bottom of the carriage 61. The PW sensor 34 detects the width of the recording paper P in the sub-scanning direction Y by the main scanning of the carriage 61, and the disc tray 7 This is used to detect the feed position of the disc tray 7 by recognizing an identification mark (not shown) attached to. Further, it is also used for detecting the presence or absence of the optical recording disk D on the disk tray 7 and the center position of the optical recording disk D.

  The MPU 104 performs arithmetic processing for executing the control program of the ink jet recording apparatus 50 and other necessary arithmetic processing. The ROM 101 stores a control program (firmware) necessary for controlling the ink jet recording apparatus 50, data necessary for processing, and the like. The interface unit 103 has a communication interface function with the host computer 200 and receives recording control data from the host computer 200. The RAM 102 is used as a primary storage area for various data including recording control data transferred from the host computer 200 via the work area of the MPU 104 and the interface unit 103. The nonvolatile memory 109 stores various types of information that need to be retained even after the inkjet recording apparatus 50 is turned off. The DC unit 105 is a control circuit for performing speed control of the PF motor 57 and the CR motor 63 that are DC motors. The DC unit 105 determines the speeds of the PF motor 57 and the CR motor 63 based on the control command sent from the MPU 104, the output signal of the rotary encoder 31, the output signal of the linear encoder 32, and the output signal of the paper detector 33. Various calculations for control are performed, and a motor control signal based on the calculation results is sent to the PF motor driver 106 and the CR motor driver 107 as “motor driving means”. The PF motor driver 106 drives and controls the PF motor 57 based on the motor control signal from the DC unit 105. In this embodiment, the PF motor 57 meshes with a paper feed roller 83, a conveyance drive roller 53, a paper discharge drive roller 55, and a rack 71 (see FIG. 2) formed on the side end of the disc tray 7. It becomes a rotational driving force source of a pinion gear (not shown) that conveys the tray 7. The CR motor driver 107 drives or controls the CR motor 63 based on a motor control signal from the DC unit 105 to reciprocate the carriage 61 in the main scanning direction, or stop and hold it. The head driver 108 drives and controls the recording head 62 based on a head control signal from the MPU 104. The recording head 62 is provided with a thermistor 621 that detects the temperature of the recording head 62 as “environmental temperature detection means”, and temperature information of the recording head 62 detected by the thermistor 621 is output to the MPU 104.

  The recording control unit 100 as the “motor control means” according to the present invention uses the power consumption of the CR motor 63 from the drive signal waveform of the CR motor driver 107 obtained from the motor control signal output from the DC unit 105 to the CR motor driver 107. Calculate the quantity. Then, the heat generation amount of the CR motor 63 is estimated based on the power consumption amount of the CR motor 63 and the temperature of the recording head 62 detected by the thermistor 621 used as the use environment temperature. The CR motor 63 is controlled by setting a pause time of the CR motor 63 so that the temperature of the motor 63 is maintained below a predetermined upper limit temperature.

FIG. 5 is a flowchart showing a procedure for controlling the CR motor 63 by setting the rest time of the CR motor 63 so that the temperature of the CR motor 63 is maintained below a predetermined upper limit temperature. This procedure is a procedure executed every time the main scanning operation is performed by the “main scanning driving unit”.
First, it is determined whether or not the heat generation DuTy is being restricted (step S1). Here, a description will be given of when the heat generation DuTy is limited. In order to prevent heat generation of the CR motor 63 due to an increase in the load on the carriage 61, while the ink jet recording apparatus 50 is powered on, the amount of heat generated by the CR motor 63 is always set at regular intervals regardless of the operation state of the carriage 61. The temperature of the CR motor 63 is specified by guessing. Then, when the temperature of the CR motor 63 exceeds a heat generation limit value 1 (dT_max1) described later, the heat generation DuTy restriction is started, and a pause time (T_wait) for maintaining the short brake state immediately after the CR motor 63 stops is set. . That is, a state in which the pause time is set so that the temperature of the CR motor 63 does not exceed the limit temperature of the CR motor 63 and the rotation control of the CR motor 63 is performed is restricting the heat generation DuTy.

When the heat generation DuTy is being restricted (Yes in step S1), after a pause time (T_wait) is read from a temperature control constant table described later, a one-pass execution current coefficient (I_tableYX) is calculated (step S3). On the other hand, when the heat generation DuTy is not limited (No in step S1), the one-pass execution current coefficient (I_tableYX) is calculated as it is (step S3).
Here, the one-pass execution current coefficient (I_tableYX) will be described.
The one-pass execution current coefficient (I_tableYX) is an execution current coefficient in one main scanning operation, the reference value of the standard execution current coefficient table is I_BtableYX, the reference value of the one-pass time table is T_tableYX, and the carriage load value to be described later I_Fuka_a and I_Fuka_b are calculated by the following equations.
When the carriage 61 is driven at a moving speed of 340 cps, 240 cps, or 185 cps
I_tableYX = (I_BtableYX + I_Fuka_a) ² × T_tableYX ÷ 1000 (1)

When the carriage 61 is driven at a moving speed of 160 cps or 92.5 cps

I_tableYX = (I_BtableYX + I_Fuka_b) ² × T_tableYX ÷ 1000 (2)

The reference execution current coefficient table is an XY reference table of current values where the moving speed of the carriage 61 is X and the moving distance of the carriage 61 is Y. The one-pass time table is the moving speed of the carriage 61 as X. It is an XY reference table of time when the movement distance is Y.

  Subsequently, the calculated one-pass execution current coefficient (I_tableYX) is added to the execution current coefficient integration amount (I_sigma) that is the integration value of the one-pass execution current coefficient (I_tableYX) during the predetermined heat generation calculation interval (T_box). The execution current coefficient integration amount (I_sigma) is updated (step S4). It should be noted that the predetermined heat generation calculation interval (T_box) is preferably set to as short a time as possible because more accurate motor temperature control is possible. In this embodiment, the predetermined heat generation calculation interval (T_box) is set to 60 seconds. Subsequently, it is determined whether or not a predetermined heat generation calculation interval (T_box) has elapsed since the previous heat generation determination (step S5). If the predetermined heat generation calculation interval (T_box) has not elapsed since the previous heat generation determination (No in step S5), the procedure is terminated as it is. On the other hand, when the predetermined heat generation calculation interval (T_box) has elapsed since the previous heat generation determination (Yes in step S5), that is, the execution current of the predetermined heat generation calculation interval (T_box) in the current heat generation determination When the coefficient integration amount (I_sigma) is determined, the execution current coefficient integration amount (I_sigma) is divided by the heat generation calculation interval (T_box) to calculate the execution current value (I_rms) of the heat generation calculation interval (T_box) (step S6). ).

Subsequently, after executing a temperature control mode setting procedure (FIG. 8) to be described later (step S7), the execution current of the current heat generation calculation interval (T_box) is calculated using different calculation formulas according to the calculated execution current value (I_rms). The value (I_rms) is converted into the current calorific value (dT_new). First, the execution current value (I_rms) is compared with the current boundary value 1 (I_per1) (step S8). If the execution current value (I_rms) is less than the current boundary value 1 (I_per1) (I_rms < I_per1), the current calorific value (dT_new) is calculated by the following formula (step S9).

dT_new = dT1_def_Ka1 / I_rms / dT1_def_Ka2 + dT1_def_Kb (3)

If the effective current value (I_rms) is greater than or equal to the current boundary value 1 (I_per1) and less than the current boundary value 2 (I_per2) (I_per1 ≦ I_rms <I_per2 in step S8), the current calorific value (dT_new) using the following formula: Is calculated (step S10).

dT_new = dT2_def_Ka1 / I_rms / dT2_def_Ka2 + dT2_def_Kb (4)

When the execution current value (I_rms) is equal to or greater than the current boundary value 2 (I_per2) (I_per2 ≦ I_rms in step S8), the current heat generation amount (dT_new) is calculated by the following formula (step S11).

dT_new = dT3_def_Ka1 / I_rms / dT3_def_Ka2 + dT3_def_Kb (5)

Then, the motor heat generation amount (dT_sum) is updated by adding the calculated current heat generation amount (dT_new) to the motor heat generation amount (dT_sum) calculated and held as the current heat generation value of the CR motor 63 (step S12). In preparation for a power failure, etc., the updated motor heat generation amount (dT_sum) is converted to 1 byte by the 1-byte conversion coefficient (EE_div) and the fraction is rounded down. The 1-byte motor heat generation amount (dT_sum_EE) is stored in the EEPROM (nonvolatile memory 109) (step S13).

dT_sum_EE = dT_sum / EE_div (6)

Note that the current boundary value 1 (I_per1) and the current boundary value 2 (I_per2) are boundary values for classifying regions according to the execution current value (I_rms). Area 1 exothermic coefficient 1 (dT1_def_Ka1), Area 1 exothermic coefficient 2 (dT1_def_Ka2), Area 1 exothermic coefficient 3 (dT1_def_Kb), Area 2 exothermic coefficient 1 (dT2_def_Ka1), Area 2 exothermic coefficient 2 (dT2_def_Ka2), Area 2 exothermic coefficient 3 (DT2_def_Kb), region 3 heat generation coefficient 1 (dT3_def_Ka1), region 3 heat generation coefficient 2 (dT3_def_Ka2), and region 3 heat generation coefficient 3 (dT3_def_Kb) are defined by current boundary value 1 (I_per1) and current boundary value 2 (I_per2) This is a coefficient for calculating the heat generation value of the CR motor 63 from the execution current value (I_rms) for each of the three areas to be classified.

Subsequently, it is determined whether or not the heat generation DuTy is being restricted (step S14). If the heat generation DuTy is not being restricted (No in step S14), it is determined whether or not the motor heat generation amount (dT_sum) exceeds the heat generation limit value 1 (dT_max1) (step S15). If the motor heat generation amount (dT_sum) does not exceed the heat generation limit value 1 (dT_max1) (No in step S15), the motor heat generation amount (dT_sum) is multiplied by the heat dissipation coefficient 1 (T_sink_Ka1), and then the heat dissipation coefficient 2 ( The reciprocal of T_sink_Ka2) is multiplied to update the motor heat generation amount (dT_sum) (step S25), and the procedure is terminated. When the motor heat generation amount (dT_sum) exceeds the heat generation limit value 1 (dT_max1) (Yes in step S15), the heat generation DuTy restriction is started (step S16), and the short brake state is maintained immediately after the CR motor 63 stops. The pause time (T_wait) to be set is set to pause time 1 (T1_wait) (step S17). Then, the motor heat generation amount (dT_sum) is multiplied by the heat dissipation coefficient 1 (T_sink_Ka1), and the motor heat generation amount (dT_sum) is updated by multiplying the reciprocal of the heat dissipation coefficient 2 (T_sink_Ka2) (step S25), and the procedure is terminated. To do. The heat generation DuTy is being restricted from the next main scanning operation, and the short brake state of the rest time 1 (T1_wait) is maintained immediately after the CR motor 63 stops. The pause time 1 (T1_wait) is set to a different time according to the moving speed (340 cps, 240 cps, 185 cps, 160 cps, 92.5 cps) of the carriage 62 in five stages.
The heat dissipation coefficient 1 (T_sink_Ka1) is the time constant of the heat generation system when the CR motor 63 is rotating, and the heat dissipation coefficient 2 (T_sink_Ka2) is the time of the heat dissipation system when the CR motor 63 is stopped. It is a constant.

  On the other hand, if the heat generation DuTy is being restricted (Yes in step S14), it is determined whether or not the motor heat generation amount (dT_sum) has decreased below a restriction release value (dT_std) as a threshold value for releasing the DuTy restriction. Determination is made (step S18). While the heat generation DuTy is limited, this step is always executed at the heat generation calculation interval (T_box) to check the heat dissipation. When the motor heat generation amount (dT_sum) is lower than the limit release value (dT_std) (Yes in step S18), after releasing the heat generation DuTy restriction (step S19), the heat generation coefficient is added to the motor heat generation amount (dT_sum). Multiply by 1 (T_sink_Ka1), and further multiply by the inverse of the heat dissipation coefficient 2 (T_sink_Ka2) to update the motor heat generation amount (dT_sum) (step S25), and the procedure ends. The CR motor 63 is controlled in a state in which the heat generation DuTy restriction is released from the next main scanning operation in which the motor heat generation amount (dT_sum) has decreased below the restriction release value (dT_std). If the motor heat generation amount (dT_sum) is equal to or greater than the limit release value (dT_std) (No in step S18), it is determined whether or not the motor heat generation amount (dT_sum) exceeds the heat generation limit value 2 (dT_max2) (step S18). S20). If the motor heat generation amount (dT_sum) does not exceed the heat generation limit value 2 (dT_max2) (No in step S20), the motor heat generation amount (dT_sum) is multiplied by the heat dissipation coefficient 1 (T_sink_Ka1), and then the heat dissipation coefficient 2 ( The motor heat generation amount (dT_sum) is updated by multiplying the reciprocal of T_sink_Ka2) (step S25), and the procedure ends with the heat generation DuTy restriction being continued.

  If the motor heat generation amount (dT_sum) exceeds the heat generation limit value 2 (dT_max2) (Yes in step S20), then whether or not the motor heat generation amount (dT_sum) exceeds the heat generation limit value 3 (dT_max3) Is determined (step S21). If the motor heat generation amount (dT_sum) exceeds the heat generation limit value 3 (dT_max3) (Yes in step S21), the pause time (T_wait) is set to the pause time 3 (T3_wait) (step S23), and the motor heat is generated. The amount of heat (dT_sum) is multiplied by the heat dissipation coefficient 1 (T_sink_Ka1), and the reciprocal of the heat dissipation coefficient 2 (T_sink_Ka2) is multiplied to update the motor heat generation amount (dT_sum) (step S25), and the procedure ends. From the next main scanning operation, immediately after the CR motor 63 stops, the short brake state of the rest time 3 (T3_wait) is maintained. For the pause time 3 (T3_wait), different constants are set for each temperature control mode regardless of the moving speed and moving distance of the carriage 61.

When the motor heat generation amount (dT_sum) does not exceed the heat generation limit value 3 (dT_max3) (No in step S21), it is determined whether or not the suspension time (T_wait) is set to the suspension time 3 (T3_wait). (Step S22). If the pause time (T_wait) is set to pause time 3 (T3_wait) (Yes in step S22), the pause time (T_wait) is set to pause time 3 (T3_wait) again (step S23), and the motor generates heat. The amount of heat (dT_sum) is multiplied by the heat dissipation coefficient 1 (T_sink_Ka1), and the reciprocal of the heat dissipation coefficient 2 (T_sink_Ka2) is multiplied to update the motor heat generation amount (dT_sum) (step S25), and the procedure ends. If the pause time (T_wait) is not set to pause time 3 (T3_wait) (No in step S22), the pause time (T_wait) is set to pause time 2 (T2_wait) (step S24), and the motor heat generation amount Multiply (dT_sum) by the heat dissipation coefficient 1 (T_sink_Ka1), and further multiply by the inverse of the heat dissipation coefficient 2 (T_sink_Ka2) to update the motor heat generation amount (dT_sum) (step S25), and the procedure ends. The short brake state of the rest time 2 (T2_wait) is maintained immediately after the CR motor 63 is stopped from the next main scanning operation. The pause time 2 (T2_wait) is set to a different time stepwise according to the moving distance of the carriage 62, and a different constant is set for each temperature control mode.
The heat generation limit value is set to a value corresponding to the motor heat generation amount (dT_sum) in the range where the temperature of the CR motor 63 is lower than the limit temperature, and the heat generation limit value 1 (dT_max1) <heat generation limit value 2 (dT_max2) < There is a relationship of heat generation limit value 3 (dT_max3), and different constants are set for each temperature control mode.

Subsequently, an initial procedure in the motor temperature control of the CR motor 63 will be described.
FIG. 6 is a flowchart showing an initial procedure for controlling the motor temperature of the CR motor 63. This procedure is performed when the ink jet recording apparatus 50 is turned on, when the ink cartridge 16 is replaced, and when the recording head 62 is periodically idled.
After the normal measurement of the CR motor 63 is executed (step S31), it is determined whether the trigger for executing the procedure is the ink cartridge 16 replacement or the regular idle suction of the recording head 62 (step S32). If the trigger for executing the procedure is replacement of the ink cartridge 16 or regular idle suction of the recording head 62 (Yes in step S32), the process proceeds to a carriage load value calculation procedure in step S38 and later described. When the trigger for executing the procedure is power ON of the ink jet recording apparatus 50 (No in step S32), subsequently, a load correction value (Crt_Mea_EE described later) stored in the EEPROM (nonvolatile memory 109) is stored. ) Is read and acquired (step S33). Subsequently, it is determined whether or not the count value of the power shut-off timer T2 that counts the elapsed time since the power-off of the ink jet recording apparatus 50 is equal to or greater than the temperature reset time (T_reset) (step S34). In this embodiment, the temperature reset time (T_reset) is set to about 3 hours.

When the count value of the power shutdown timer T2 is less than the temperature reset time (T_reset) (No in step S34), the motor heat generation amount (dT_sum_EE) stored in the EEPROM (nonvolatile memory 109) is read, and the following The motor heat generation amount (dT_sum) up to the previous time is calculated and obtained by the equation (step S35).

dT_sum = dT_sum_EE × EE_div (7)

When the count value of the power shutdown timer T2 is equal to or greater than the temperature reset time (T_reset) (Yes in step S34), the motor heat generation amount (dT_sum_EE) stored in the EEPROM (nonvolatile memory 109) is not used. The initial value of the motor heat generation amount (dT_sum) is acquired by the following equation (step S36).

dT_sum = 1 × EE_div (8)

Subsequently, using the load correction value expansion coefficient (EE_div_Mea), the load correction value (Crt_Mea) is calculated from the load correction value (Crt_Mea_EE) read from the EEPROM (nonvolatile memory 109) by the following equation (step S37).

Crt_Mea = Crt_Mea_EE × EE_div_Mea (9)

Subsequently, a carriage load value calculation procedure is executed.

First, the moving speed of the carriage 61 is set to 340 cps, and the carriage 61 is reciprocated in the main scanning direction X. From the average value of the current value of the CR motor 63 in the forward path and the current value of the CR motor 63 in the return path at that time A measurement value (aveTi_a) at a movement speed of 340 cps is acquired (step S38). Subsequently, the carriage load value 1 (I_Fuka_a) used for calculating the one-pass execution current coefficient (I_tableYX) when the carriage 61 is driven at a movement speed of 340 cps, 240 cps, or 185 cps is measured at the measurement value (aveTi_a) at the movement speed of 340 cps. ) From the following equation (step S39).

I_Fuka_a = (Fuka_Ka1, aveTi_a-Fuka_Kb1) / MotorR + (Hosei_a1, Crt_mea / Hosei_a2
+ Hosei_b)… (10)

Subsequently, the moving speed of the carriage 61 is set to 160 cps, and the carriage 61 is reciprocated in the main scanning direction X. At that time, the average value of the current value of the CR motor 63 in the forward path and the current value of the CR motor 63 in the return path To obtain a measurement value (aveTi_b) at a moving speed of 160 cps (step S40). Subsequently, the carriage load value 2 (I_Fuka_b) used for calculating the one-pass execution current coefficient (I_tableYX) when the carriage 61 is driven at a movement speed of 160 cps or 92.5 cps is a measurement value (aveTi_b) at the movement speed of 160 cps. ) From the following equation (step S41).

I_Fuka_b = (Fuka_Ka2, aveTi_b-Fuka_Kb2) / MotorR + Crt_mea (11)

The load correction value (Crt_Mea) is a correction value for correcting an individual difference in the load amount (sliding resistance between the carriage 61 and the carriage guide shaft 51) of the mechanism for reciprocating the carriage 61.
The load conversion coefficient 1 (Fuka_Ka1, Fuka_Ka2) and the load conversion coefficient 2 (Fuka_Kb1, Fuka_Kb2) are conversion coefficients for converting the carriage load value (I_Fuka) from the measurement value (aveTi). Motor resistance (MotorR) is the resistance value of the internal winding of the CR motor 63. Correction value 1 (Hosei_a1), correction value 2 (Hosei_a2), and correction value 3 (Hosei_b) correct the load correction value (Crt_Mea) to simplify the calculation when calculating the carriage load value 1 (I_Fuka_a). It is a correction value for

FIG. 7 is a flowchart showing a power-off process procedure of the ink jet recording apparatus 50.
The motor heat generation amount (dT_sum) at the time when the power OFF operation is performed by the power switch 35 of the ink jet recording apparatus 50 is converted into 1 byte by the above-described equation (6). The 1-byte motor heat generation amount (dT_sum_EE) is stored in the EEPROM (nonvolatile memory 109) (step S51).

Subsequently, the temperature control mode setting procedure of the CR motor 63 described above will be described.
FIG. 8 is a flowchart showing a procedure for setting the temperature control mode. This procedure is executed every time the automatic feeding operation of the recording paper P by the “automatic paper feeding device” is performed.
After the automatic paper feeding operation of the recording paper P by the “automatic paper feeding device” is executed (step S61), the temperature detected by the thermistor 621 that detects the temperature of the recording head 62 is acquired as the “use environment temperature” ( Step S62). Since the amount of heat generated by the recording head 62 itself is small, the temperature of the recording head 62 changes in accordance with the use environment temperature. Therefore, the temperature difference between the temperature of the recording head 62 and the use environment temperature is small enough to be ignored. That is, the temperature of the recording head 62 and the use environment temperature are substantially the same. Thus, the use environment temperature of the ink jet recording apparatus 50 is detected by using the thermistor 621 as a means for detecting the temperature of the recording head 62 originally provided for the purpose of protecting the recording head 62 as described above. . Thereby, the motor control of the CR motor 63 can be executed based on the use environment temperature without newly providing a means for detecting the use environment temperature.

Subsequently, it is determined whether or not the temperature acquired from the thermistor 621 is equal to or less than 40 ° set as the “mode boundary temperature” set to a predetermined temperature in the use environment temperature range in which the operation of the ink jet recording apparatus 50 is guaranteed. (Step S63). When the temperature acquired from the thermistor 621 is 40 ° or less (Yes in Step S63), the temperature control mode is set to the normal temperature mode as the “first temperature control mode” (Step S64), and then the recorded value P is reached. Is recorded (step S66). In the normal temperature mode, among the temperature control constants, the current boundary value 2 (I_per2) is the current boundary value 2L (I_per2_L), the heat generation limit value 1 (dT_max1) is the heat generation limit value 1L (dT_max1_L), and the heat generation limit value 2 (dT_max2) Is exothermic limit value 2L (dT_max2_L), exothermic limit value 3 (dT_max3) is exothermic limit value 3L (dT_max3_L), pause time 2 (T2_wait) is pause time 2L (T2_wait_L), pause time 3 (T3_wait) is pause time 3L ( T3_wait_L).
When the temperature acquired from the thermistor 621 exceeds 40 ° (No in step S63), after setting the temperature control mode to the high temperature mode as the “second temperature control mode” (step S65), Recording to the recording value P is executed (step S66). In the high temperature mode, of the temperature control constants, the current boundary value 2 (I_per2) is the current boundary value 2H (I_per2_H), the heat generation limit value 1 (dT_max1) is the heat generation limit value 1H (dT_max1_H), and the heat generation limit value 2 (dT_max2) Is exothermic limit value 2H (dT_max2_H), exothermic limit value 3 (dT_max3) is exothermic limit value 3H (dT_max3_H), pause time 2 (T2_wait) is pause time 2H (T2_wait_H), pause time 3 (T3_wait) is pause time 3H ( T3_wait_H).

Thus, based on the calorific value (dT_sum) of the CR motor 63 estimated from the current consumption of the CR motor 63, the pause time (T_wait) is set so that the temperature of the CR motor 63 is maintained below a predetermined upper limit temperature. When the CR motor 63 is controlled, motor control of the CR motor 63 is executed based on the use environment temperature detected by the thermistor 621 for detecting the temperature of the recording head 62. As a result, the CR motor 63 can be controlled by setting a realistic temperature range that changes in accordance with the use environment temperature, so that the temperature of the CR motor 63 does not exceed the upper limit temperature more efficiently. It is possible to rotate the CR motor 63 at a low cost.
Further, the temperature control mode is switched depending on whether or not the use environment temperature detected by the thermistor 621 is equal to or lower than the mode boundary temperature, and a constant (temperature control constant) used for temperature control is selected according to the switching of the temperature control mode. Therefore, it is not necessary to calculate the temperature control constant according to the use environment temperature. Thereby, the CR motor 63 is more efficiently controlled within a range where the temperature of the CR motor 63 does not exceed the upper limit temperature while minimizing an increase in the processing load of the motor control due to maintaining the temperature of the CR motor 63 below the predetermined upper limit temperature. The motor 63 can be rotated.
Then, the CR motor 63 serving as the driving force source of the “main scanning driving means” can be rotated more efficiently within a range where the temperature of the CR motor 63 does not exceed the upper limit temperature, thereby executing recording on the recording paper P. Throughput can be greatly improved.
Further, each time the main scanning operation by the “main scanning driving means” is performed, the thermistor 621 may detect the use environment temperature and set the temperature control mode, whereby the temperature of the CR motor 63 increases the upper limit temperature. Control that rotates the CR motor 63 more efficiently within a range that does not exceed can be performed with higher accuracy.

  As another embodiment, in addition to the above-described embodiment, a motor temperature control similar to that of the CR motor 63 is executed for the PF motor 57 as a driving force source of the “sub-scanning driving means”. Can be mentioned. In this case, the temperature of the PF motor 57 is not estimated from the motor current value, but based on the accumulated rotation amount obtained by accumulating the actual rotation amount of the PF motor 57 obtained from the rotary encoder 31 that detects the rotation amount of the transport driving roller 53. Then, the heat generation amount of the PF motor 57 is estimated, and based on the estimated heat generation amount, the pause time of the PF motor 57 is set so that the temperature of the PF motor 57 is maintained below a predetermined upper limit temperature, and the PF motor 57 is controlled. It can also be done.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

1 is a perspective view of an ink jet recording apparatus. FIG. 3 is a perspective view of the ink jet recording apparatus with a main body cover removed. 1 is a schematic side sectional view of an ink jet recording apparatus. It is a block diagram of a recording control unit of the ink jet recording apparatus. It is the flowchart which showed the procedure which controls CR motor. It is the flowchart which showed the procedure which controls CR motor. It is the flowchart which showed the initial procedure of the motor temperature control of CR motor. It is the flowchart which showed the power-OFF process procedure. It is the flowchart which showed the setting procedure of temperature control mode.

Explanation of symbols

4 Memory slot cover, 6 Remote receiver, 7 Disc tray, 8 Paper cassette, 16 Ink cartridge, 17 Ink tube, 31 Rotary encoder, 32 Linear encoder, 35 Power switch, 50 Inkjet recording device, 51 Carriage guide shaft, 52 Platen, 53 Conveyance Drive Roller, 54 Conveyance Driven Roller, 55 Discharged Driven Roller, 56 Discharged Driven Roller, 57 PF Motor, 61 Carriage, 62 Recording Head, 63 CR Motor, 83 Paper Feeding Roller, 100 Recording Control Unit, 101 ROM, 102 RAM, 103 interface unit, 104 MPU, 105 DC unit, 106 PF motor driver, 107 CR motor driver, 108 head driver, 109 nonvolatile memory, 120 remote memory , X main scanning direction, Y sub-scanning direction

Claims (7)

A motor, and an environmental temperature detecting means for detecting an operating environmental temperature;
The heat generation amount of the motor is estimated based on the power consumption amount of the motor, and the motor temperature is set to a predetermined upper limit temperature based on the estimated heat generation amount of the motor and the environmental temperature detected by the environmental temperature detection means. An electronic apparatus comprising: a control device having motor control means for controlling the motor by setting a rest time as maintained below. A motor, and an environmental temperature detecting means for detecting an operating environmental temperature;
The heat generation amount of the motor is estimated based on the accumulated rotation amount obtained by accumulating the rotation amount of the motor, and the temperature of the motor is determined based on the estimated heat generation amount of the motor and the environmental temperature detected by the environmental temperature detection means. An electronic apparatus comprising: a control device having motor control means for controlling the motor by setting a pause time so that is maintained below a predetermined upper limit temperature. 3. The mode boundary temperature according to claim 1, wherein the motor control unit sets the use environment temperature detected by the environment temperature detection unit to a predetermined temperature within a use environment temperature range in which the operation of the electronic device is guaranteed. A first temperature control mode selected in the following cases;
A second temperature control mode that is selected when the use environment temperature detected by the environment temperature detection means exceeds the mode boundary temperature;
In the first temperature control mode, the mode boundary temperature is the use environment temperature, and in the second temperature control mode, the upper limit value of the use environment temperature range in which the operation of the electronic device is guaranteed is the use environment temperature. An electronic apparatus, wherein a temperature control constant set in advance for each temperature control mode is selected according to the temperature control mode. 4. The main scanning driving means for reciprocating a recording head for ejecting ink onto the recording material in the main scanning direction, and a sub scanning driving means for conveying the recording material by a predetermined conveyance amount in the sub scanning direction. The control device includes a recording control unit that controls the recording head, the main scanning driving unit, and the sub-scanning driving unit to execute recording on a recording material,
The electronic apparatus according to claim 1, wherein the environmental temperature detection means is a head temperature detection means for detecting a temperature of the recording head disposed in the recording head. An automatic paper feeding device for automatically feeding recording paper as a recording material to the sub-scanning drive unit according to claim 4,
The electronic apparatus according to claim 1, wherein the motor control unit sets a temperature control mode according to a temperature detected by the environmental temperature detection unit during an automatic sheet feeding operation by the automatic sheet feeder. 6. The electronic apparatus according to claim 4, wherein the motor is a driving force source of the main scanning driving unit. 7. The electronic apparatus according to claim 6, wherein the motor control unit sets a temperature control mode in accordance with the temperature detected by the environmental temperature detection unit every time a main scanning operation is performed by the main scanning driving unit. .

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