JP2006095978A - Medium feeding amount correction method, control program, and recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medium feeding amount correction method, a control program, a recording device, and a liquid jet device which are used for performing two kinds of color recording processes respectively with high image quality. <P>SOLUTION: A difference between respective optimum feeding amounts when performing the two kinds of color recording processes is calculated beforehand. The optimum feeding amount when performing one kind of color recording process in applicable machine types is calculated. The optimum feeding amount when performing the other kind of color recording process in the applicable machine types is calculated by operating the difference from the optimum feeding amount when performing the one kind of color recording process. By this, the independent optimum feeding amount of each of the two kinds of color recording processes can be acquired. Consequently, the two kinds of high image-quality color recording can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and a control program for correcting a medium feed amount when recording while transporting a medium, and a recording apparatus and a liquid ejecting apparatus capable of controlling the medium feed amount correction.

  A large-sized ink jet printer, which is one of recording apparatuses, is used not only for relatively large cut sheets such as JIS standard A0 size and JIS standard B0 size, but also for roll papers having such widths. Can also be recorded. Such an ink jet printer generally includes ink cartridges for eight colors, and eight nozzle rows for ejecting eight colors of ink are formed on the ink ejection surface of the recording head. Yes. (See Patent Document 1).

JP 2003-341163 A

  When recording on a large sheet, a large amount of ink is consumed, and thus the recording operation may have to be stopped for the replacement operation of the ink cartridge. Therefore, there are cases where two sets of four color ink cartridges are set so that the recording operation can be performed continuously. When recording is performed with two sets of four color ink cartridges set, two rows are used in order from the both sides of the eight nozzle rows inward to use the same color nozzle row.

  Here, it is desirable that the nozzle array of the recording head be parallel to the paper feed direction, but it may be tilted due to the effect of the adjustment resolution of the tilt adjusting device when the head is mounted, and in particular the apparent appearance of the nozzle arrays on both sides. Is longer than the length of a normal nozzle row. In such a case, since the paper feed amount is corrected by adjusting the image quality for 8 colors, there is no particular problem as long as it is within the image quality adjustment range. The level may decrease.

  The present invention has been made in view of the various problems as described above. The object of the present invention is to provide a medium feed amount correction method, a control program, a recording apparatus, and a liquid jet for performing two types of color recording with high image quality. To provide an apparatus.

  To achieve the above object, the medium feed amount correction method of the present invention is a method for correcting the feed amount of the medium when recording while transporting the medium, and each optimum feed when performing two types of color recording. The difference in quantity is obtained in advance, the optimum feed amount for one type of color recording in the applicable model is obtained, and the difference is calculated from this optimum feed amount, and the optimum for the other type of color recording in the applicable model It is characterized by obtaining the feed amount. As a result, each of the two types of color records can have an optimum optimum feed amount, so that two types of color records with high image quality can be obtained.

  Further, the present invention is characterized in that it is applied when a recording material of an overlapping color is used for the other type of color recording. As a result, it is possible to optimize color recording that tends to degrade image quality. In addition, the difference corresponding to the type of the medium is stored as a table. Thereby, it is possible to easily set the optimum feed amount that varies depending on the type of the medium.

  In order to achieve the above object, the medium feed amount correction control program according to the present invention is a control program for correcting the amount of feed of the medium when recording while transporting the medium. A step of obtaining an optimum feed amount difference in advance; a step of obtaining an optimum feed amount at the time of color recording of one type in the applicable model; and calculating the difference from the optimum feed amount to determine the other type in the applicable model. And a step of obtaining an optimum feed amount at the time of color recording.

  To achieve the above object, the recording apparatus of the present invention is a recording apparatus for recording on a recording medium, and is characterized in that the above-mentioned medium feed amount correction can be controlled. In order to achieve the above object, the liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects a liquid onto a medium to be ejected, and is characterized in that each medium feed amount correction can be controlled. Thereby, a recording apparatus or a liquid ejecting apparatus that exhibits the above-described effects can be provided.

  1 and 2 are perspective views of an external configuration example of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention as viewed from the front side, and FIG. 3 is a perspective view of the same as viewed from the back side. 4 and 4 are perspective views showing the internal structure thereof. The ink jet printer 100 is a large printer capable of recording up to a relatively large size cut paper such as JIS standard A0 size or JIS standard B0 size and roll paper R having the paper width. Then, eight-color recording in which eight color ink cartridges are set and four-color recording in which two sets of four color ink cartridges are set are possible.

  As shown in FIGS. 1 to 4, the ink jet printer 100 includes a rectangular parallelepiped printer body 110 and printer legs 120 that support the printer body 110. The printer main body 110 is divided into upper and lower layers as shown in FIGS. 1 to 4, and a roll paper storage portion 130 is disposed at the boundary between the upper and lower layers on the back side as shown in FIG. ing. As shown in FIGS. 1 to 4, a paper supply / discharge unit 140 and a recording unit 150 are disposed in the upper layer. Further, as shown in FIGS. 1 to 4, a sheet suction unit 160 is disposed at the center of the lower layer, and an ink supply unit 170 is disposed on the left side of the lower layer when viewed from the front side. On the right side of the lower layer, a head characteristic recovery unit 180 and a drive control unit 190 in which a characteristic control program of the present invention is stored are arranged up and down. As shown in FIGS. 1 to 4, a waste ink collection unit 200 is disposed below the drive control unit 190 and beside the printer leg 120.

  As shown in FIGS. 1 to 3, the printer main body 110 includes an upper housing 111 made of plastic or sheet metal that covers the paper supply / discharge unit 140 and the recording unit 150, a paper suction unit 160, an ink supply unit 170, and head characteristics recovery. A lower housing 112 made of plastic or sheet metal that covers the part 180 and the drive control part 190 is provided. As shown in FIG. 2, the upper housing 111 is provided with a body cover 113 made of plastic or sheet metal so as to be openable from the center front surface to the center upper surface. In addition, as shown in FIG. 2, the lower housing 112 is provided with an ink cover 114 made of plastic or sheet metal so that the front surface of the ink supply unit 170 can be opened.

  As shown in FIGS. 1 and 2, the main body cover 113 is supported so that the rear portion is rotatable with respect to the upper housing 111, and the user puts his / her finger into a recessed finger-hanging portion 113 a formed on the front surface. It opens and closes by being pushed up or pushed down. The user can open the main body cover 113 to largely open the upper part of the paper supply / discharge unit 140 and the recording unit 150, so that the maintenance operation of the recording head 152, the carriage 153, etc., the paper jam during recording or transporting, etc. It is possible to easily perform the operation of canceling the paper conveyance error. Further, as shown in FIGS. 1 and 3, the main body cover 113 is provided with a window 113b made of transparent or translucent plastic on a part of its upper surface. The user can visually recognize the recording state and the conveyance state by looking inside the window 113b without opening the main body cover 113.

  As shown in FIGS. 1 and 2, the ink cover 114 is supported so that both sides thereof are slidable with respect to the lower housing 112, and the user puts his / her finger into a recessed finger-hanging portion 114 a formed on the front surface. It opens and closes by being pushed up or pushed down. Since the user can open the front surface of the ink supply unit 170 by opening the ink cover 114, the user can easily replace the ink cartridge 10 or the like. Further, as shown in FIGS. 1 and 2, the ink cover 114 is provided with a window 114b made of a transparent or translucent plastic at a part of the front surface. The user can view the state of the ink cartridge 10 by looking through the window 114b without opening the ink cover 114.

  Further, as shown in FIGS. 1 to 3, the printer main body 110 is provided with an operation panel 115 for the user to operate recording control and the like on the upper surface of the upper right layer when viewed from the front side. . The operation panel 115 is provided with a liquid crystal screen and various buttons so that the user can operate the buttons while checking the liquid crystal screen. Since the user can perform a reliable operation by visual recognition, an operation error, an operation error, and the like can be eliminated.

  As shown in FIGS. 1 to 4, the printer leg portion 120 includes two inverted T-shaped support columns 121 and a reinforcing column 122 spanned between the support columns 121. The printer main body 110 is placed on the support column 121 and fixed with screws. Since the printer main body 110 is lifted by the printer legs 120, the user can easily perform the paper supply / discharge process and various maintenance processes. Furthermore, it becomes possible to install a paper discharge receiving portion in the space of the printer leg portion 120, so that recorded paper can be efficiently collected and contamination of the recorded paper can be prevented.

  As shown in FIG. 3, the roll paper storage unit 130 is inserted in the inner periphery of the roll paper R to support the roll paper R, and the both ends of the spindle 131 are pivotally supported. Has no bearing. The back surface of the sheet suction unit 160 is formed so as to be recessed from the back surfaces of the ink supply unit 170 and the back surfaces of the head characteristic recovery unit 180 and the drive control unit 190 on both sides of the sheet suction unit 160. 130 is disposed.

  That is, bearings (not shown) are provided on opposite sides of the ink supply unit 170, the head characteristic recovery unit 180, and the drive control unit 190 to support the spindle 131 in the main scanning direction so as to pivotally support both ends thereof. . Then, the roll paper R can be set without protruding from the back side of the printer main body 110 by bridging the spindle 131 penetrating the inner periphery of the roll paper R between these bearings.

  As shown in FIG. 4, the paper supply / discharge unit 140 includes a paper feed roller 141 and a paper feed driven roller 142. The paper feed roller 141 and the paper feed follower roller 142 are arranged so that the shaft faces the main scanning direction and the circumferential surface is up and down on the downstream side of the paper feed from the roll paper storage unit 130, that is, the rear side in the printer main body 110. It arrange | positions so that it may oppose. The paper feed roller 141 is formed as a single long roller, and the peripheral surface portion slightly larger than the maximum recordable paper width is coated with ceramic powder or the like. As a result, slippage during paper feeding can be prevented, and the paper can be fed out with high accuracy. Both ends of the paper feed roller 141 are axially supported by side frames 116 via bearings (not shown), and are driven to rotate forward and backward by a driving force transmitted from the paper feed motor 143 through the pulley 144 and the belt 145. It has become.

  The paper feed driven roller 142 is formed as a plurality of short rollers, and is pivotally supported by a plurality of driven roller support members 146 arranged in parallel in the axial direction above the paper feed roller 141. The paper feed driven roller 142 is pressed against the paper feed roller 141 by a biasing member such as a spring (not shown) attached to the driven roller support member 146, and follows the forward / reverse rotation drive of the paper feed roller 141. It is designed to rotate forward and reverse. Thus, the sheet can be firmly pressed from both sides and sent out, so that highly accurate recording can be performed. The paper feed roller 141 and the paper feed driven roller 142 sandwich the roll paper R and the cut paper fed from the paper feed port 147 formed between the upper and lower layers of the printer main body 110 shown in FIG. 2 and 4 are sent out onto the platen 151 of the recording unit 150 and discharged from a paper discharge port 148 formed between upper and lower layers of the printer main body 110 shown in FIG.

  As shown in FIGS. 2 and 4, the recording unit 150 is mounted on the platen 151 disposed immediately downstream of the paper feed roller 141, the carriage 153 on which the recording head 152 is mounted, and the carriage 153. A cutter 154 is provided. Further, the recording unit 150 includes a flexible flat cable (hereinafter referred to as FFC) (not shown) that electrically connects the recording head 152 and a drive control unit 190 for executing recording, an ink cartridge containing the recording head 151 and ink. And an ink tube (not shown) that connects to the printer 10.

  The platen 151 is formed in a rectangular flat plate shape having a length slightly larger than the maximum recordable paper width, and is disposed along the paper feed roller 141. The platen 151 has a plurality of holes (not shown) connected to the paper suction unit 160 from the front surface to the back surface, and a plurality of uneven portions (not shown) that absorb a cockling of the paper caused by moisture absorption is formed on the surface. Yes. As a result, the paper being recorded can be held in a substantially flat shape, so that highly accurate recording can be performed.

  Further, a cutter groove 151 a extending in the main scanning direction is formed on the surface of the platen 151. The cutter groove 151a is sized so that the cutting edge of the cutter 154 protruding from the lower surface of the roll paper R can enter so that the cutter 154 does not damage the surface of the platen 151 when the roll paper R is cut in the width direction. Is formed. Thereby, the recording part and unrecorded part of the roll paper R can be reliably separated.

  The recording head 152 is disposed at a lower portion of the carriage 153 so as to face the cut paper or the roll paper R supplied to the upper surface of the platen 151 with a predetermined interval, and black, cyan, magenta, yellow, red, Eight nozzle rows that eject eight colors of light black, light magenta, light cyan, and blue, respectively, or eight nozzle rows that eject four colors of black, cyan, magenta, and yellow in two rows each are formed. Has been. The recording head 152 is provided with a pressure generation chamber and a nozzle opening connected to the pressure generation chamber. The ink is stored in the pressure generation chamber and pressurized with a predetermined pressure, so that the nozzle opening of each nozzle row is placed on the upper surface of the platen 151. Controlled ink droplets are ejected toward the supplied cut paper or roll paper R.

  The carriage 153 is placed on a carriage guide shaft 155 provided in the main scanning direction via a bearing (not shown), and is coupled to the belt 156. The carriage 153 is entrained by the movement of the belt 156 when the pulley 157 constituting the moving means is rotated by the carriage motor constituting the moving means (not shown) and the belt 156 constituting the moving means is rotated. Guided by 155, it reciprocates in the main scanning direction. As a result, the carriage 153 can be moved with high accuracy, so that highly accurate recording can be performed.

  The cutter 154 is disposed so as to be movable up and down in the vertical direction and movable in the main scanning direction so that the blade edge faces downward. The cutter 154 is moved up and down by, for example, a solenoid and moved in the main scanning direction together with the carriage 153. Therefore, it is not necessary to separately provide a means for moving the cutter 154, so that space can be saved and cost can be reduced. The cutter 154 may be separated from the carriage 153 and moved in the main scanning direction by a unique belt mechanism or a motor.

  The FFC has one end connected to the connector of the drive control unit 190 and the other end connected to the connector of the recording head 152, and sends a recording signal from the drive control unit 190 to the recording head 152. The ink tubes are provided for the inks of the respective colors, and one end of each ink tube is connected to the corresponding ink cartridge 10 via an ink pressurizing and supplying means (not shown), and the other end of each color recording head. 152 is connected. The ink tube is configured to send ink of each color pressurized by the ink pressure supply means from the ink cartridge 10 to the recording head 152.

  As shown in FIG. 4, the sheet suction unit 160 includes a pressure chamber 161 disposed in the lower part of the platen 151 and a fan (not shown) disposed in the lower part of the pressure chamber 161. The pressure chamber 161 is formed in a box shape in which a part of the upper surface and the bottom surface is opened, a platen 151 is attached to the open portion of the upper surface, and a fan is attached to the open portion of the bottom surface. By rotating the fan, the air is sucked into the pressure chamber 161 from the hole formed in the platen 151 and exhausted to the outside through the fan. Therefore, when cut paper or roll paper R is supplied to the upper surface of the platen 151, negative pressure is generated on the lower surface side of the cut paper or roll paper R, so that the cut paper or roll paper R is attracted to the upper surface of the platen 151. As a result, the cut paper or the roll paper R can be prevented from being lifted, and the recording accuracy can be maintained with high accuracy.

  As shown in FIG. 4, the ink supply unit 170 includes a box-shaped cartridge storage unit 171 and a cartridge pressing unit 172 attached to the front side of the cartridge storage unit 171. The cartridge storage portion 171 includes a total of four ink cartridges 10 such as black, cyan, magenta, yellow, red, light black, light magenta, light cyan, and blue, or a total of four ink cartridges of black, cyan, magenta, and yellow in order from the left side in the figure. A total of eight ink cartridges 10 in two sets of ink cartridges 10 are individually pulled out from the front side and partitioned so as to be pushed in. The cartridge pressing portion 172 is attached to each partition portion of the cartridge storage portion 171 so as to be freely opened and closed. The cartridge pressing portion 172 presses the ink cartridge 10 in the partition portion in conjunction with the closing operation, and ink cartridges in the partition portion in conjunction with the opening operation. 10 is popping out.

  Here, the ink cartridge 10 is hermetically sealed, for example, in an outer case formed in a rectangular parallelepiped shape with a hard plastic material, for example, in a bag shape made of a flexible material and filled with ink inside. . An ink supply port connected to the ink tank and a positioning hole in the cartridge housing portion 171 are formed on the surface on the insertion side to the cartridge housing portion 171. On the other hand, an ink supply needle inserted into the ink supply port of the ink cartridge 10 and a positioning needle inserted into the positioning hole of the ink cartridge 10 are pulled out and pushed in the ink cartridge 10 on the inner rear surface of the cartridge housing portion 171. It is arrange | positioned so that it may protrude.

  Therefore, the ink cartridge 10 accommodated in the cartridge accommodating portion 171 is automatically positioned when the positioning needle is inserted into the positioning hole when the cartridge pressing portion 172 is closed. The ink can be supplied to the recording head 152 by entering the ink supply port. When the cartridge pressing portion 172 is opened, the positioning needle is automatically extracted from the positioning hole, and at the same time, the ink supply needle is automatically extracted from the ink supply port.

  The head characteristic recovery unit 180 is disposed below the carriage 153 located at the home position shown in FIG. 4, and includes wiping means, capping means, suction means, and drive means for these. The wiping means includes a wiper formed in a substantially rectangular flat plate shape using rubber, felt, plastic, or the like, and rubs against the nozzle forming surface of the recording head 152 so as to wipe off ink adhering to the nozzle forming surface. It has become.

  The capping means is provided with a cap formed in a substantially rectangular parallelepiped shape by rubber, and a recess provided in the upper part is pressed against the nozzle forming surface of the recording head 152 to seal the nozzle opening. The suction means forcibly sucks and discharges the ink in order to remove clogged nozzle openings and mixed bubbles. Therefore, it is possible to perform processing for maintaining the ink ejection characteristics of the recording head 152 in a constant state when the carriage 153 is in the home position.

  The waste ink collection unit 200 includes a detachable waste liquid cartridge 201. The waste liquid cartridge 201 stores waste liquid such as ink used when initially filling the ink supply system reaching the recording head 152 or cleaning liquid used when cleaning the ink supply system reaching the recording head 152. It has become. Thus, since the waste liquid processing can be completed only by replacing the waste liquid cartridge 201, the number of work steps can be reduced, and contamination of the peripheral portion of the printer can be prevented.

  Here, the ink jet printer 100 according to the present embodiment has a case where eight color ink cartridges 10 are set for recording and a case where two sets of four color ink cartridges 10 are set for recording. When two sets of four-color ink cartridges 10 are set for recording, two nozzle rows of the same color are formed in order from both sides to the inside of the eight nozzle rows formed on the recording head 152. use.

  As described in the related art, the nozzle row of the recording head 152 is desirably parallel to the paper feed direction, but may be tilted due to the influence of the adjustment resolution of the tilt adjusting device when the head is mounted. The apparent length of the nozzle rows on both sides is longer than the length of a normal nozzle row. In such a case, since the paper feed amount is corrected by adjusting the image quality for 8 colors, there is no particular problem as long as it is within the image quality adjustment range. The level may decrease. Therefore, the ink jet printer 100 stores a paper feed amount correction control program, which is a characteristic method of the present invention, in the drive control unit 190, and will be described below with reference to the drawings.

  FIG. 5 is a flowchart for explaining the paper feed amount correction method according to the embodiment of the present invention. Steps S1 to S10 show processing operations until a paper feed correction value applicable to the ink jet printer 100 is obtained, and steps S11 to S14 show an ink jet printer that applies the obtained paper feed correction value. The processing operation for 100 is shown. First, in a production experimental machine before assembling as a product, a sample when the paper feed amount of 8-color recording is changed and a sample when the paper feed amount of 4-color recording is changed are printed (steps) S1).

  When the sample printing is completed in a predetermined number of production experiment machines (step S2), the optimum paper feed amount for 8-color recording and the optimum paper feed amount for 4-color recording in all production experiment machines are determined (step S3). Here, as shown in FIG. 6, in the sample printing, for example, the arbitrarily selected 8-color recording paper feed amount and 4-color recording paper feed amount are shifted by 0.05% within a range of ± 0.2%. Print the belt-like pattern on one sheet of paper. When the paper feed amount is inappropriate, that is, when it is too small, black streaks appear, and when it is excessive, white streaks appear. Therefore, an approximately intermediate value at which these streaks do not appear is determined as the optimum paper feed amount.

  Then, the average value of the optimum paper feed amount for 8-color recording and the average value of the optimum paper feed amount for 4-color recording in the determined all production experimental machines are calculated (step S4), and the average of the optimum paper feed amount for 8-color recording is calculated. The difference between the value and the average value of the optimum paper feed amount for four-color recording is calculated (step S5). The calculated difference is set as a paper feed correction value in a table for all production test machines, and the optimum paper feed amount for 4-color recording is calculated based on the optimum paper feed amount for 8-color recording and the paper feed correction value read from the table. (Step S6).

  Then, 8-color recording and 4-color recording are executed in the production experimental machine (step S7), and when the above recording is completed in a predetermined number of production experimental machines (step S8), the image quality of the 8-color recording in all the production experimental machines and 4 The image quality of color recording is confirmed (step S9). Then, if the image quality of 8-color recording and the image quality of 4-color recording are good in all production experimental machines, the paper feed correction value set in the table is adopted (step S10).

  Next, in the production machine assembled as a product, the paper feed correction value is set in a table (step S11), and a sample when the paper feed amount for 8-color recording is changed is printed (step S12). Then, the optimum paper feed amount for eight color recording is determined (step S13), and the optimum paper feed amount for four color recording is calculated based on the optimum paper feed amount for eight color recording and the paper feed correction value read from the table. (Step S14).

  As described above, for example, a difference between the optimum feed amounts in the case of performing two types of color recording such as 8-color recording and 4-color recording is obtained in advance, and one type of color recording in the applicable model, for example, 8 colors, is performed. Since the optimum feed amount at the time of recording is obtained, the above difference is calculated as a paper feed correction value from this optimum feed amount, and the other type of color recording in the applicable model, for example, the optimum feed amount at the time of four-color recording is obtained. Each of the two types of color records can have an optimum optimum feed amount, and two types of color records with high image quality can be obtained. In particular, when a recording material having an overlapping color is used for the other type of color recording, it is possible to optimize the color recording that tends to deteriorate the image quality. Further, a paper feed correction value corresponding to the paper type may be provided as a table, and the optimum feed amount that changes depending on the paper type can be easily set.

  As long as it is a recording device, it can be applied to, for example, a facsimile machine, a copying machine, and the like. In addition to a recording apparatus, the meaning of a liquid ejecting apparatus that ejects a liquid corresponding to its use from a liquid ejecting head onto an ejected medium instead of ink and attaches the liquid to the ejected medium is, for example, a liquid crystal display or the like Color material jet head used for manufacturing color filters, electrode material (conductive paste) jet head used for electrode formation for organic EL display and surface emitting display (FED), bio-organic jet head used for biochip manufacturing, precision pipette The present invention can also be applied to an apparatus equipped with a sample ejection head or the like.

1 is a first perspective view of an external configuration example of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention, viewed from the front side. FIG. 3 is a second perspective view of an external configuration example of the printer of FIG. 1 viewed from the front side. It is the perspective view which looked at the printer of FIG. 1 from the back side. FIG. 2 is a perspective view showing an internal structure of the printer of FIG. 1. It is a flowchart explaining the paper feed amount correction method which is an embodiment of the present invention. It is a figure which shows an example of the sample printing shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Ink cartridge, 100 Inkjet printer, 110 Printer main-body part, 111 Upper housing, 112 Lower housing, 113 Main-body cover, 114 Ink cover, 115 Operation panel, 120 Printer leg part, 130 Roll paper storage part, 140 Feed / discharge part , 141 paper feed roller, 142 paper feed driven roller, 143 paper feed motor, 150 recording unit, 151 platen, 152 recording head, 153 carriage, 154 cutter, 155 carriage guide shaft, 156 belt, 157 pulley, 158 vibration absorbing means, 160 Sheet suction unit, 161 pressure chamber, 170 ink supply unit, 171 cartridge storage unit, 172 cartridge holding unit, 180 head characteristic recovery unit, 190 drive control unit, 200 waste ink recovery unit

Claims (6)

A method for correcting a feeding amount of the medium when recording while conveying the medium,
The difference between the optimum feed amounts when performing two types of color recording is obtained in advance,
Find the optimum feed amount for one type of color recording in the applicable model,
A medium feed amount correction method, wherein the difference is calculated from the optimum feed amount to obtain an optimum feed amount at the time of color recording of the other type in the applicable model. 2. The medium feeding amount correction method according to claim 1, wherein the medium feeding amount correction method is applied when a recording material having an overlapping color is used for the other type of color recording. 3. The medium feeding amount correction method according to claim 1, wherein the difference corresponding to the type of the medium is stored as a table. A control program for correcting the feeding amount of the medium when recording while conveying the medium,
A step of previously obtaining a difference between the optimum feed amounts when performing two types of color recording;
A step of obtaining an optimum feed amount for one type of color recording in the applicable model;
A medium feed amount correction control program, comprising: calculating the difference from the optimum feed amount to obtain an optimum feed amount at the time of color recording of the other type in the applicable model. A recording device for recording on a recording medium,
A recording apparatus, wherein the medium feed amount correction according to claim 1 is controllable. A liquid ejecting apparatus that ejects liquid onto an ejection target medium,
A liquid ejecting apparatus, wherein the medium feed amount correction according to claim 1 is controllable.

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