JP2002347235A - Recorder and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an apparatus from being enlarged and also shorten the recording time in the ink jet serial printer. SOLUTION: There are provided a driving means for reciprocating a recording head relatively to a recording medium, a movement control means for detecting a position of the recording head and controlling the driving means on the basis of the detected position information, a discharge control means for controlling discharging a recording agent by driving nozzles of the recording head, and a control change means for changing an acceleration/deceleration at an operation time of the recording head by the movement control means from driving control contents of the nozzles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a recording apparatus such as an ink jet printer and a control method thereof.

[0002]

2. Description of the Related Art Ink jet printers that perform recording by ejecting ink supplied to a recording head toward a sheet by heating or vibration are currently the mainstream among serial printers.

FIG. 6 is a schematic diagram showing a relationship between nozzles of a conventional print head and a print scanning range.

In the ink jet printer, there are various types of nozzle arrangements for each color, such as a vertical arrangement and a horizontal arrangement. The horizontal arrangement as shown in the drawing is generally used due to the size of the apparatus and the ease of control. I have. In the case of side-by-side arrangement, as shown in the figure, the recording area
Acceleration is started before the acceleration distance required for the nozzle for starting the first recording, and the nozzle is decelerated and stopped from the nozzle position where the recording is finally ended for the distance required for deceleration. In the case of recording in the reverse direction, the above operation is reversed.

In other words, control is performed such that all the print target nozzles decelerate from the print area after moving out of the print area, and conversely, finish the acceleration before all the print target nozzles enter the print area. ing.

[0006] In a normal printer, a side wall (printer frame) exists at a position where a margin for allowing the carrier to scan the print head by the print area is provided (the right side wall of the printer in FIG. 6).

However, in FIG. 6, the left side wall of the printer is located outside the acceleration region at a standby position (capping is performed to protect the recording head) or at a preliminary ejection (use of unused nozzles during recording to use nozzles). Since there is a preliminary discharge hole for preventing clogging, etc., there is a margin in comparison with the right side wall.

FIG. 7 is a schematic diagram showing the relationship between the acceleration distance, the printing scan range, and the printing result in the conventional example.

When the acceleration distance is short as shown in FIG. 7 (a), the carrier rises at an abrupt acceleration, so that the speed of the carrier greatly fluctuates in the initial stage of the recording after the constant velocity. May be uneven. As a countermeasure against such a problem, as shown in FIG. 7B, it is necessary to reduce the unevenness of the carrier speed at the initial stage of the recording after the constant speed by setting the acceleration of the start-up to be small to eliminate the unevenness of the recording. Have been done.

[0010]

The problem with the above-mentioned recording method is that even if the carrier speed is the same, the recording image is disturbed in the recording mode.
Even if it is desired to set the deceleration distance longer than in other modes, the apparatus itself is usually designed to be the shortest, so the apparatus itself must be enlarged accordingly. Further, even if the length can be set long, the entire recording time becomes long, and the recording speed is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a recording apparatus capable of reducing the recording time without increasing the size of the apparatus and a control method thereof.

[0012]

In order to solve the above-mentioned problems and to achieve the object, a recording apparatus according to the present invention comprises a recording head having a nozzle for discharging a recording agent onto a recording medium, and Driving means for relatively reciprocating driving;
Movement control means for detecting the position of the recording head and controlling the driving means based on the detected position information;
Discharge control means for controlling the discharge of the printing agent by driving the nozzles of the print head; and control change for changing the acceleration / deceleration during the printing operation of the print head by the movement control means from the content of the drive control of the nozzles. Means.

According to a control method of a recording apparatus of the present invention, a driving means for reciprocatingly driving a recording head having a nozzle for discharging a recording material onto a recording medium with respect to the recording medium is provided. Control of a printing apparatus comprising: a movement control unit that detects and controls the driving unit based on the detected position information; and a discharge control unit that drives a nozzle of the printing head to control the discharge of the printing material. A method of changing the acceleration / deceleration of the recording head during the recording operation by the movement control means based on the content of the drive control of the nozzle.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which the recording apparatus of the present invention is applied to an ink jet serial printer will be described in detail with reference to the accompanying drawings. [Configuration of Recording Apparatus] FIG. 1 is a perspective view showing an outline of an ink jet serial printer according to an embodiment of the present invention.

In the figure, a carrier 1 comprises a guide shaft 2,
LF held on the chassis 3 by the guide rail 4
It is supported so as to be able to reciprocate opposite the roller 5 and the platen 6. The recording head 7 is mounted on the carrier 1, and reciprocates along the guide shaft 2 by a carrier motor 8 transmitted via a belt 9.

At the time of recording, the carrier 1 moves at a constant speed after being accelerated from the stopped state. In this state, the recording head 7 is driven to eject ink in accordance with the recording data sent into the printer. After the driving of the recording head 7 for one row is completed, the carrier 1
Is decelerated and stops.

FIG. 2 is a perspective view showing a driving mechanism of the carrier.

In FIG. 1, a guide shaft 2 is fixed to a chassis 3 and serves as a guide when the carrier 1 reciprocates.
The belt 9 is connected to a carrier motor 8 fixed to the chassis 3 and fixed to the carrier 1, and has a role of converting the rotation of the carrier motor 8 into reciprocating motion to move the carrier 1. The encoder 40 is marked at a constant pitch and is held on the chassis 3 with a predetermined tension.

The encoder 40 is, for example, 300 lpi
(Line per inch, 25.4 mm / 300 = 84.6
The position of the carrier 1 can be accurately acquired by detecting the marks provided at equal intervals in (μm) by the encoder sensor 45 fixed to the carrier 1. An optical system or a magnetic system is used as the encoder system. Also,
At the time of scanning of the carrier 1, the speed of the carrier can be calculated from the time interval of the continuous detection of the marks on the linear encoder scale.

FIG. 3 is an enlarged sectional view showing a bearing provided in the carrier.

As shown in FIG. 3, a plurality of arc-shaped steps 11a are formed on the inner diameter of the bearing 11 over the entire circumference to reduce the sliding area with the guide shaft.

The width of each step 11a is 0.35 m.
m, the number of steps is 16, so the total contact length in the circumferential direction with the guide shaft is 0.35 × 16 = 5.6 mm. 5.6 / 8π = 0.22, and the contact area is 78%
Can be reduced.

As described above, by reducing the contact area between the carrier and the guide shaft, the sliding resistance between the bearing 11 and the guide shaft is reduced, and the carrier can run stably.

FIG. 4 is a block diagram showing the configuration of an ink jet serial printer.

In the figure, reference numeral 301 denotes a CPU-P (central processing unit) for controlling the entire printer, and a ROM-P
According to the control program in 303, various instruction signals input from two sensors (carrier encoder sensor 312, paper insertion sensor 313), various switches 309 to 311 provided on the operation panel, and the like via the complex control unit 305, , Three motors (the carrier motor 8 and the paper feed motor 31) via the motor drivers 314 to 316 based on the print command sent from the host to the interface 321 read from the I / F controller 320.
8, the printhead (inkjet head) 7 via the rotation control of the paper feed motor 319) and the composite control unit 305.
The recording data is output to the recording head, and the recording data is transferred to the recording head, and recording control corresponding to the command is performed.

Reference numeral 302 denotes a RAM-P (printer RAM:
Temporary storage memory), which is expanded data for recording,
Data received from the host (record command and record data)
Buffer, a work for storing necessary information such as a recording speed, a work area of the CPU-P301, and the like.

Reference numeral 303 denotes a ROM-P (printer ROM:
A read-only memory) that transfers print data executed by the CPU-P 301 to a print head and performs printing, a program for controlling the carrier 1 and paper feed, a printer emulation program, or a font ( Font).

Reference numeral 305 denotes a complex control unit such as an ASIC, which turns on, turns off, and blinks the recording head 7 and the LED 307, a power switch 309, a cover open switch 3
11 and a detection function of the paper insertion sensor 313.

Reference numerals 314 to 316 denote motor drivers for driving and controlling the respective motors.

Reference numerals 8, 318, and 319 denote motors connected to the motor drivers 314 to 316, which are driven and controlled by the motor drivers 314 to 316 according to instructions from the CPU-P.

As the carrier motor 8, a DC servo motor is used for performing servo control as described later, and the paper feed motor 318 and the paper feed motor 319 have a CPU-P3
01, a stepping motor that is easy to control is used.

Reference numeral 320 denotes an I / F controller.
This is a bidirectional interface that is connected to the host computer via the I / F, receives command data and recording data from the host computer, and transmits printer side abnormal information, etc. Interface is applicable.

Reference numeral 330 denotes a non-volatile random write memory for storing the number of prints, the number of ink ejection dots, the number of ink tank replacements, the number of print head replacements, the number of executions of a user command cleaning operation, and the like. It is retained even if it breaks.

FIG. 5 is a schematic diagram illustrating a carrier scanning speed control system of the ink jet printer.

The carrier motor (DC motor) 8 is a PI motor.
It is controlled by a method called D control or classic control. The procedure will be described.

First, the target speed to be given to the carrier 1 is:
It is given in the form of "speed command". "Speed command" increases (accelerates) the speed at a fixed rate and sets the target speed (constant speed)
In general, the speed is reduced (decelerated) at a fixed rate from near the target stop position. Here, when the carrier 1 is driven at 25 inch / sec during normal recording, the time required for acceleration is 60 msec (same for deceleration). The speed conversion circuit inputs the signal of the encoder sensor 45 to the ASIC inside the printer and counts the signal by a timer built in the ASIC, thereby obtaining the “scanning speed” of the current carrier.
Is calculated. The value obtained by subtracting the "scanning speed value" from the "speed command value" is passed to the "PID calculation process" as a "speed error" that is insufficient for the target speed, and the energy to be given to the carrier motor 8 at that time is It is calculated by a method called “PID calculation”. In this example, the “motor driver circuit” that has received the signal changes the pulse width of the applied voltage while keeping the motor applied voltage constant (hereinafter referred to as “PWM (Pulse Width Modula)”.
In this case, the current value is adjusted by changing the duty of the applied voltage, the energy applied to the DC motor is adjusted, and the speed is controlled.

The ink jet printer is provided with a cleaning unit 13 for protecting and maintaining the recording head 7.
If recording is not performed for a long time, the recording head 7 and the carrier 1
It moves to the position 3 and is in a state covered by the cap in the cleaning unit. [Print Control Method] FIG. 8 is a schematic diagram showing the relationship between the nozzles of the print head according to the first embodiment of the present invention and the scanning range during forward printing.

Normally, an ink jet recording apparatus has a plurality of recording modes. For example, there are a speed priority mode, a normal mode, a fine mode, and the like. In the case of recording a color image, in the speed priority mode, the carrier speed is increased, and the image is thinned to perform recording at a high speed.

In the normal mode, recording is performed using the four colors of black, C, M, and Y while setting the carrier speed to a medium speed. In this case, carrier scanning is performed as shown in FIG.

In the fine mode, recording may be performed using only three colors of C, M, and Y. For example, in the case of a print head configuration using black ink for pigment-based ink to give priority to the quality of character images and dye ink for color ink, there is no problem in the speed priority mode or the normal mode, but in the fine mode, there is no problem. In order to obtain a toned image, only the three CMY dye-based colors are used due to the difference in penetration characteristics between the black pigment-based ink and the dye-based ink, and the black ink is often expressed by three-color process black.

In recording in such a fine mode, there is a problem that image unevenness due to carrier speed fluctuation becomes more remarkable as compared with the speed priority mode and the normal mode. For this reason, if the carrier acceleration / deceleration distance is set larger than in the speed priority mode or the normal mode, and if the carrier acceleration / deceleration distance is the same, if the idle distance is set before and after the recording area, stable You can get the image
The size of the apparatus must be increased accordingly, and the time required for the entire recording increases.

Therefore, as shown in FIG. 8, only in the case of the mode using only three colors, if only the acceleration distance is set longer than in the other recording modes and acceleration is made slowly,
Even in the fine mode, a stable image can be obtained.
FIG. 8 shows that in the case of the forward recording operation, the acceleration is started from a position before the normal acceleration start position (standby position), and the acceleration distance is obtained without increasing the external dimensions of the apparatus.

FIG. 9 is a schematic diagram showing the relationship between the nozzles of the recording head according to the first embodiment of the present invention and the scanning range during reverse recording.

As in FIG. 8, when only three color nozzles are used in the fine mode, and when the previous printing operation is a printing operation to fill the entire printing area, the carrier starts decelerating from the point C where the ejection of the cyan nozzle is completed, and returns to the point D. Stop at The carrier can be moved to the point D 'because the black nozzle has a margin for stopping the ejection at the carrier stop position. Therefore, in the next reverse recording, by starting acceleration from the point D ', the acceleration distance to the point C can be set larger than usual, and the external dimensions of the apparatus do not increase.

FIG. 10 is a schematic diagram showing carrier scanning when the recording head of the first embodiment of the present invention reverses from reverse recording to forward recording.

Here, a description will be given of the inversion state when recording is performed bidirectionally to fill the entire recording area. In reverse recording, the deceleration distance itself is the same as in other recording modes.
Preparatory movement (3) to perform deceleration & stop of (1) of 0 (a) and acceleration of (4) for the next forward recording
After that, acceleration (4) is performed to perform forward recording. However, in this case, it takes a long time for the reversal because a slow movement (3) having a short moving distance is involved. Accordingly, in the present embodiment, the presence or absence of the next (for example, forward) recording operation is detected in the (for example, reverse) recording area (1) (before the start of deceleration), and the presence of the next recording operation is determined. Figure 10
As shown in (b), by extending the constant velocity operation after the end of one recording, decelerating (2 '), and then accelerating (3') therefrom, it is possible to smoothly reverse. Have been.

FIG. 11 is a schematic diagram showing carrier scanning when an interruption operation is performed when reversing from reverse recording to normal recording of a conventional recording head.

In an ink jet printer, even during a normal printing operation, it is necessary to move to a preliminary ejection hole to discharge all nozzles in order to prevent clogging of nozzles not used for printing. Since the preliminary ejection hole is at a position (A in FIG. 10) before the start of acceleration outside the recording area (since the ejection operation is required during the recording operation), if the interruption is performed during the operation as shown in FIG. 11, (1) the reverse direction Extend the record for the next forward record,
(2) deceleration, (3) moving to the preliminary ejection position, preliminary ejection operation,
(4) Move to the original position (acceleration start position for forward direction recording), (5) Acceleration, (6) Forward direction recording, which is a movement including a very useless operation.

FIG. 12 is a schematic diagram showing carrier scanning when an interruption operation is performed when the recording head is reversed from reverse recording to normal recording in the first embodiment according to the present invention.

In the case of the extension operation based on the determination of the next recording operation described with reference to FIG. 10, the extension is not simply performed but is performed at the point where the reverse recording (1) is completed in the figure and the next recording operation is determined. And the interrupt operation (preliminary ejection operation to the position before) simultaneously occur, the priority is assigned to the processing, so that the recording is not deliberately extended and the preliminary ejection is decelerated as it is. Perform the operation. Thereafter, in order to perform the forward recording operation, the preparatory movement (3) is performed, and then the acceleration (4) for the forward recording operation and the forward recording operation (5) are performed. The shortest operation can be performed without performing useless operation as shown in FIG.

FIG. 13 is a flowchart when the extension operation is performed with the priorities set.

In the servo control of the carrier, the arithmetic processing is performed in the block of FIG. 4 by the timer processing interrupting at a cycle of 1 msec. In this, how to extend the currently operating carrier movement will be described. First, in step S1301, it is checked whether or not the current position is the deceleration start position for each interruption.

If it is determined in step S1301 that the vehicle is at the deceleration start position, it is checked in step S1302 whether an extension operation has already been performed for the current operation. If extension has already been performed, the process ends without performing extension processing. Then, if the extension processing has not been executed yet, step S130
Then, if there is no extension request to start deceleration (the next carrier operation after the stop is not yet determined), the process is terminated without performing the extension process.

On the other hand, if the extension request is determined in step S1303 (extension request is present), the flow advances to step S1304, and if there is a request of priority 1 (in this embodiment, an extension request for preliminary ejection) Then, the process proceeds to step S1305 to add the movement amount corresponding to the extension request to the constant speed movement amount, and sets the extension execution completed flag in step S1306 to end the processing.

In step S1304, if there is no request of priority 1, the flow proceeds to step S1307. If there is a request of priority 2 (in the case of this embodiment, a request to extend the previous movement for the next recording), the flow proceeds to step S1308. Then, the moving amount for the extension request is added to the constant speed moving amount, and step S13 is performed.
At 06, the extension execution completed flag is set, and the process ends. Thereafter, if there is a priority, processing similar to the third and fourth processing is repeated.

[Second Embodiment] In the first embodiment, at the time of extension operation,
We set priorities and decided how to extend, but instead of priority, the extension target was longer or shorter,
It is also possible to configure to extend to the shorter one. With this configuration, the same result can be obtained without being extended based on a long request and returning in the next operation.

In the above embodiment, the description has been made assuming that the droplets ejected from the recording head are ink, and that the liquid stored in the ink tank is ink. It is not limited. For example, an ink tank may contain a processing liquid discharged to a recording medium in order to improve the fixability and water resistance of the recorded image or to improve the image quality.

The above-described embodiment is particularly provided with a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for performing ink ejection even in an ink jet recording system. By using a method in which a change in the state of the ink is caused by energy, it is possible to achieve higher density and higher definition of recording.

The typical configuration and principle are described in, for example, US Pat. Nos. 4,723,129 and 4,740.
It is preferable to use the basic principle disclosed in the specification of Japanese Patent No. 796. This method can be applied to both the so-called on-demand type and continuous type. In particular, in the case of the on-demand type, liquid (ink)
By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise exceeding the nucleate boiling to the electrothermal transducer arranged corresponding to the sheet or the liquid path in which Since thermal energy is generated in the electrothermal transducer and film boiling occurs on the heat-acting surface of the recording head, bubbles in the liquid (ink) corresponding to this drive signal on a one-to-one basis can be formed. It is valid. By discharging the liquid (ink) through the discharge opening by the growth and contraction of the bubble, at least one droplet is formed. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubble are performed immediately and appropriately, so that the ejection of the liquid (ink) having particularly excellent responsiveness can be achieved, which is more preferable.

As the pulse-shaped driving signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 relating to the temperature rise rate of the heat acting surface are adopted, more excellent recording can be performed.

As the configuration of the recording head, in addition to the combination of a discharge port, a liquid path, and an electrothermal converter (a linear liquid flow path or a right-angled liquid flow path) as disclosed in the above-mentioned respective specifications, A configuration using U.S. Pat. No. 4,558,333 or U.S. Pat. No. 4,459,600, which discloses a configuration in which a heat acting surface is arranged in a bent region, is also included in the present invention. In addition, for multiple electrothermal transducers,
JP-A-59-123670 which discloses a configuration in which a common slot is used as a discharge part of an electrothermal transducer, and JP-A-59-123670 which discloses a configuration in which an opening for absorbing a pressure wave of thermal energy corresponds to a discharge part. A configuration based on 138461 may be adopted.

Further, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus, the length is determined by combining a plurality of recording heads as disclosed in the above specification. This may be either a configuration satisfying the above requirements or a configuration as a single recording head formed integrally.

In addition to the cartridge-type recording head in which the ink tank is provided integrally with the recording head itself described in the above embodiment, the recording head is electrically connected to the apparatus main body by being mounted on the apparatus main body. A replaceable chip-type recording head, which enables a simple connection and supply of ink from the apparatus main body, may be used.

It is preferable to add recovery means for the print head, preliminary auxiliary means, and the like to the above-described configuration of the printing apparatus, since the printing operation can be further stabilized. Specific examples thereof include capping means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element or a combination thereof. It is also effective to provide a preliminary ejection mode for performing ejection that is different from printing, in order to perform stable printing.

Further, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but may be a single recording head or a combination of plural recording heads. Alternatively, the apparatus may be provided with at least one of full colors by color mixture.

In the above-described embodiment, the description has been made on the assumption that the ink is a liquid. However, even if the ink solidifies at room temperature or lower, the ink that softens or liquefies at room temperature is used. Or, in the ink jet method, generally, the temperature of the ink itself is controlled within a range of 30 ° C. or more and 70 ° C. or less to control the temperature so that the viscosity of the ink is in a stable ejection range.
It is sufficient that the ink is in a liquid state when the use recording signal is applied.

In addition, in order to positively prevent temperature rise due to thermal energy as energy for changing the state of the ink from the solid state to the liquid state, the temperature is positively prevented.
Alternatively, in order to prevent evaporation of the ink, an ink which solidifies in a standing state and liquefies by heating may be used. In any case, the application of heat energy causes the ink to be liquefied by application of the heat energy according to the recording signal and the liquid ink to be ejected, or to start to solidify when reaching the recording medium. The present invention is also applicable to a case where an ink having a property of liquefying for the first time is used. In such a case, as described in JP-A-54-56847 or JP-A-60-71260, the ink is held in a liquid state or a solid state in the concave portion or through hole of the porous sheet. It is good also as a form which opposes an electrothermal transducer. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition to the above, the recording apparatus according to the present invention may be provided not only as an image output terminal of an information processing apparatus such as a computer but also integrally or separately, a copying apparatus combined with a reader or the like, and a transmission / reception apparatus. It may take the form of a facsimile machine having functions.

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus (for example, a copying machine) Machine, facsimile machine, etc.).

Another object of the present invention is to supply a storage medium (or a recording medium) in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and to provide a computer (a computer) of the system or the apparatus. It is needless to say that the present invention can also be achieved by a CPU or an MPU) reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention. Also,
When the computer executes the readout program code, not only the functions of the above-described embodiments are realized, but also the operating system (OS) running on the computer based on the instructions of the program code.
It goes without saying that a case where the functions of the above-described embodiments are implemented by performing some or all of the actual processing, and the processing performs the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into the memory provided in the function expansion card inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. Needless to say, the CPU included in the function expansion card or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

When the present invention is applied to the storage medium, the storage medium stores program codes and various tables corresponding to the above-described flowchart shown in FIG.

[0071]

As described above, according to the present invention,
By changing the acceleration / deceleration at the time of the recording operation of the recording head based on the content of the drive control of the nozzles of the recording head, the recording time can be shortened without increasing the size of the apparatus.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an outline of an inkjet serial printer.

FIG. 2 is a perspective view showing a carrier driving mechanism.

FIG. 3 is an enlarged sectional view showing a bearing provided in a carrier.

FIG. 4 is a block diagram illustrating a configuration of an inkjet serial printer.

FIG. 5 is a schematic diagram illustrating a carrier scanning speed control system of the inkjet printer.

FIG. 6 is a schematic diagram illustrating a relationship between nozzles of a conventional print head and a print scan range.

FIG. 7 is a schematic diagram showing a conventional relationship between an acceleration distance, a printing scan range, and a printing result.

FIG. 8 is a schematic diagram illustrating a relationship between nozzles of a print head and a scanning range during forward printing according to the first embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating a relationship between nozzles of a print head and a scan range during reverse printing according to the first embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating carrier scanning when the recording head reverses from reverse recording to normal recording in the first embodiment of the present invention.

FIG. 11 is a schematic diagram illustrating carrier scanning when an interruption operation is performed when the recording head is reversed from reverse recording to forward recording.

FIG. 12 is a schematic diagram illustrating carrier scanning when executing an interrupt operation when reversing from reverse recording to normal recording of the recording head according to the first embodiment of the present invention.

FIG. 13 is a flowchart when a priority order is set and an extension operation is performed in the first embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier 2 Guide shaft 3 Chassis 4 Guide rail 5 LF roller 6 Platen 7 Recording head 8 Carrier motor 9 Belt 10 Recording paper 11 Pinch roller 12 Discharge roller 13 Cleaning unit 14 Paper supply unit 15 Cap 16 Cap base 17 Cap lever 20 Cam 30 Pump base 40 Encoder 45 Encoder sensor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C056 EA01 EA23 EB11 EB29 EB36 EB58 EC11 EC28 EC31 FA03 FA11 2C480 CA09 CA11 CA19 CA31 CB02 CB31 CB33 CB35 DA01 DB02 EA03 EA05 EA06 EA22 EA27 EB03 EB14

Claims (16)

[Claims] A driving unit for reciprocatingly driving a recording head having a nozzle for ejecting a recording agent onto the recording medium with respect to the recording medium; detecting a position of the recording head; and detecting the detected position. A movement control unit that controls the driving unit based on information; an ejection control unit that drives a nozzle of the recording head to control the ejection of the recording material; A printing apparatus comprising: a control changing unit configured to change an acceleration / deceleration during a printing operation of the printing head. 2. The printing apparatus according to claim 1, wherein the movement control unit accelerates the printing head from a movement start position to a printing area during the printing operation of the printing head, moves the printing head at a constant speed in the printing area, and passes the printing area. 2. The recording apparatus according to claim 1, wherein control is performed so as to decelerate afterward. 3. The control change means detects the presence or absence of the next printing operation at the time of the current printing operation, and if there is the next printing operation, extends the constant velocity area in the current printing operation. 3. The recording device according to claim 2, wherein 4. The control change means detects the presence or absence of a plurality of printing operations after the next printing operation during the current printing operation,
3. The recording apparatus according to claim 2, wherein when there are a plurality of the next recording operations, priorities are assigned to the plurality of recording operations, and the constant velocity area is extended based on the priorities. . 5. The printing apparatus according to claim 5, wherein the priority order is set such that a recording operation having a short extension distance is prioritized in accordance with an extension distance of a constant velocity area extended by the control change unit. Item 5. The recording device according to Item 4. 6. The recording apparatus according to claim 1, wherein the recording head is an inkjet recording head that performs recording by discharging ink. 7. The recording head according to claim 1, wherein the recording head ejects ink by using thermal energy, and includes a thermal energy converter for generating thermal energy to be applied to the ink. Item 2. The recording device according to Item 1. 8. A drive means for reciprocatingly driving a recording head having a nozzle for ejecting a recording material onto a recording medium with respect to the recording medium, detecting a position of the recording head, and detecting the detected position. A control method for a printing apparatus, comprising: a movement control unit that controls the driving unit based on information; and a discharge control unit that drives a nozzle of the print head to control discharge of the printing material. A control method for a printing apparatus, wherein the acceleration / deceleration at the time of a printing operation of the print head by the movement control means is changed from the drive control content. 9. The recording head accelerates the recording head from a movement start position to a recording area during a recording operation of the recording head, moves the recording head at a constant speed in the recording area, and moves the recording head after passing the recording area. The control method of a recording apparatus according to claim 8, wherein the control is performed so as to decelerate. 10. During the recording operation of the recording head, the presence or absence of the next recording operation during the current recording operation is detected,
The method according to claim 9, wherein when there is the next recording operation, the constant velocity area in the current recording operation is extended. 11. During a recording operation of the recording head, the presence or absence of a plurality of recording operations after the next recording operation is detected at the time of the current recording operation. 10. The method according to claim 9, wherein priorities are assigned to the recording operations, and the constant velocity area is extended based on the priorities. 12. The recording apparatus according to claim 11, wherein the priority order is set in accordance with an extension distance of the constant velocity area so that a recording operation with a short extension distance is given priority. Control method. 13. The method according to claim 8, wherein the recording head is an inkjet recording head that performs recording by discharging ink. 14. The recording head according to claim 1, wherein the recording head ejects ink using thermal energy, and includes a thermal energy converter for generating thermal energy applied to the ink. Item 9. A method for controlling a recording device according to Item 8. 15. A computer program for controlling a computer to execute the method of controlling a recording device according to claim 8. Description: 16. A computer-readable storage medium storing a program code for controlling a computer to execute the method for controlling a recording device according to claim 8. Description: