JP3472036B2 - Recording apparatus and paper feed control method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus and a paper feed control method thereof, and more particularly, to a recording apparatus configured to obtain recording information by superposing ink on a recording paper and recording the ink a plurality of times. The present invention relates to a paper feed control method.

[0002]

2. Description of the Related Art Conventionally, in a printer configured to obtain a desired color recording by superposing a plurality of color inks (single color may be used) on a recording medium, ink ribbons of different colors are stored. There is known a thermal transfer printer in which each of the ribbon cassettes is held in a plurality of cassette holders, and a ribbon cassette in which ribbons of a required color are stored is mounted on a carriage for recording.

In a conventional thermal transfer printer of this type, for example, when color recording is performed using yellow, magenta, cyan and black inks, first, a ribbon cassette containing a yellow ink ribbon is mounted on a carriage. Then, based on the yellow recording signal, the thermal head, which is the recording head, is moved while being pressed against the platen, and the thermal head is driven 1
Record lines.

After the recording of one line is completed, the carriage is moved in the direction opposite to the recording direction to return to the recording start position while the thermal head is separated from and contacted with the platen, and the drive source of the paper feeding mechanism is also used. The stepping motor is driven a predetermined number of steps to convey the recording paper for one line. This line feed amount is set to be smaller than the recording width of the heating element of the thermal head by several dots in order to prevent the occurrence of white stripes at the line feed portion.

By repeating this operation, the recording in yellow is completed. By the end of this yellow recording, the recording paper is line-feeded by a predetermined number, but the total number of drive steps required for these line-feeds is recorded in memory, and the stepping motor is reversed by this number of steps. Rotate,
The recording paper is conveyed backward and returned to the original recording start position.

After that, the ribbon cassette loaded with the yellow ink ribbon mounted on the carriage is replaced with a ribbon cassette loaded with the magenta ink ribbon, and a yellow recording signal is transferred to a magenta recording signal. Based on this, recording is performed by the same operation as the above-described yellow recording.

After the recording based on the magenta recording signal,
Similarly, the cyan ink ribbon is used for recording based on the cyan recording signal, and the cyan recording is followed by the black ink ribbon for recording based on the black recording signal.

By doing so, recording on one recording sheet is completed.

[0009]

However, in such color recording, the recording start position of the first color of yellow and 2
It was found that there was a slight misalignment (several dots) with the recording start position after the color, which is inconvenient for obtaining high quality recording.

This is because the recording paper shrinks due to the evaporation of water on the recording paper due to the heat of the thermal head during the recording of the first color and the sliding of the thermal head under pressure against the paper. It is caused by.

On the other hand, in color recording in which an ink jet head is used as a recording head and liquid inks of respective colors are ejected in order, the recording paper is expanded in contrast to the recording by the thermal head because the recording Shiga ink liquid is absorbed. Will be done.

The present invention has been made in view of the above points, and when recording information is obtained by recording ink a plurality of times by overlapping ink on a recording medium, the respective recording start positions are aligned and the second and subsequent recording positions are aligned. An object of the present invention is to provide a recording apparatus and a paper feed control method for the recording apparatus, which can prevent positional deviation of recording.

[0013]

In order to achieve the above-mentioned object, a recording apparatus according to a first aspect of the present invention causes a control section of the recording apparatus to perform first recording on data to be recorded and recording paper. A storage unit that stores the number of drive steps of the stepping motor required for the sheet conveyance at the time of recording, and when the sheet is reversely conveyed after the first recording, the number of reverse conveyance steps is recorded according to the expansion and contraction of the recording sheet in the first recording. While controlling the driving of the stepping motor so as to carry the paper in the reverse direction, at the time of the second and subsequent recordings overlaid on the first recording, the step number corresponding to the expansion and contraction of the recording paper in the first recording is And a control means for controlling the drive of the stepping motor so that the recording paper is conveyed by the number of conveyance steps for one line feed corrected by dividing the line feed required for recording. It is characterized in.

According to a second aspect of the present invention, in the step of driving the stepping motor, the control unit of the recording apparatus requires the data to be recorded and the sheet conveyance for the first recording on the recording sheet. A storage means for storing the number and a reverse conveying step in which the number of driving steps required for conveying the recording paper at the time of the first recording is corrected by a correction step number according to the number of driving steps at the time of reverse conveying after the first recording. The stepping motor drive is controlled so as to carry the recording paper backward by a number, and at the time of the second and subsequent recordings overlaid on the first recording, 1 at the time of the first recording.
And a control means for controlling the drive of the stepping motor so that the recording paper is conveyed by the number of conveyance steps in which the number of basic steps for line feed is corrected by the number of correction steps and the number of line feeds at the time of first recording. Is characterized by.

According to a third aspect of the present invention, in the recording apparatus according to the second aspect, the control unit includes a basic step number table for determining a basic step number for one line feed, and reverse conveyance. It is characterized by further comprising another storage means having a correction step number table for determining the number of steps and the number of carrying steps.

According to a fourth aspect of the present invention, in the recording apparatus according to the second or third aspect, the number of reverse conveyance steps after the first recording is based on the driving step number and the correction step number. This is a small number of steps, and the number of conveyance steps when performing the second and subsequent recordings on this recording paper is A for the basic step number for one line feed, N for the correction step, and M for the number of line feeds at the first recording. And if
6. The number of A-N / M steps, 6.
The recording apparatus according to claim 2 is the recording apparatus according to claim 2 or 3, wherein the number of reverse transport steps after the first recording is the number of steps greater than the number of driving steps by the number of correction steps, and When carrying out the second and subsequent recordings on the recording paper, A + N / M, where A is the number of basic steps for one line feed, N is the number of correction steps, and M is the number of line feeds at the first recording. It is characterized by the number of steps.

According to a sixth aspect of the present invention, there is provided a recording apparatus according to the second to fifth aspects, further comprising a correction unit that corrects the number of correction steps in accordance with a use environment of the recording apparatus. It is characterized by having.

According to a seventh aspect of the present invention, there is provided a paper feed control method, wherein the number of drive steps of the stepping motor used for carrying the first recording on the recording paper is stored, and the recording paper after the first recording is stored. At the time of reverse conveyance of, the number of reverse conveyance steps is calculated by correcting the number of drive steps with the number of correction steps,
The driving of the stepping motor is controlled so that the recording paper is conveyed in the reverse conveyance step number, and the basic step number is corrected in the step of correcting the basic step number when the second and subsequent recording operations are performed over the first recording operation. The number of conveyance steps is corrected according to the number and the number of line feeds at the time of first recording, and the driving of the stepping motor is controlled so that the recording paper is conveyed by one line feed at the number of conveyance steps. It is a thing.

According to the recording apparatus and the paper feed control method thereof according to the present invention, the step number of the stepping motor is corrected in consideration of the expansion / contraction amount of the recording paper by the first recording with respect to the second and subsequent times. It is possible to prevent the positional deviation of ink by aligning the recording start positions.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

A plate-shaped platen 2 extending in the longitudinal direction is arranged in the main body case 1 of the thermal transfer printer of the present embodiment shown in FIG. 1, and between the both side plates of the main body case 1, A carriage shaft 3 that is located in front of the platen 2 and extends parallel to the platen 2 is supported. A carriage 4 is attached to the carriage shaft 3.
Is mounted reciprocally along the carriage shaft 3, and a thermal head 5 as a recording head is attached to the tip of the carriage 4 so as to be opposed to the platen 2 so as to be able to move toward and away from the platen 2. The carriage 4 is provided with a thermal head drive motor (not shown). An ink ribbon (not shown) is housed on the upper surface of the carriage 4, and a ribbon cassette 6 for guiding the ink ribbon between the thermal head 5 and the platen 2 is detachably mounted. On the upper surface of the carriage 4, a winding bobbin 7 for winding the ink ribbon of the ribbon cassette 6 and a delivery bobbin 8 for conveying the ink ribbon are arranged.

Note that the recording apparatus of this embodiment is equipped with a plurality of ribbon cassettes 6 for accommodating yellow, magenta, cyan, and black ink ribbons for color recording.

A carriage drive motor 9 is disposed below one end of the main body case 1 such that an output shaft 10 of the carriage drive motor 9 penetrates the upper surface of the main body case 1. The output shaft 10 is provided with a drive pulley 11 which is driven to rotate by the carriage drive motor 9. A driven pulley 12 is rotatably arranged on the upper surface of the other end of the main body case 1, and a part of the driven pulley 12 is on the lower surface of the carriage 4 between the drive pulley 11 and the driven pulley 12. The connected carriage drive belt 13 is spanned. Then, the carriage drive motor 9 is rotationally driven to drive the carriage drive belt 13 via the drive pulley 11, whereby the carriage 4 is reciprocated along the carriage shaft 3 in parallel with the platen 2. ing.

Further, as shown in FIG. 2, the platen 2
Below the rear part, between the left and right side plates of the main body case 1,
A roller shaft 14 is erected, and a conveying roller 15 that conveys recording paper as a recording medium at a predetermined speed is arranged on the roller shaft 14 so as to rotate integrally with the roller shaft 14. A stepping motor (not shown) as a conveying motor for rotating the roller shaft 14 is disposed near the roller shaft 14, and is connected to the roller shaft 14 via a gear group. There is. A plurality of pressure contact rollers 16 that are in pressure contact with the transport roller 15 are rotatably disposed below the transport roller 15. Further, a sheet feeding device (not shown) is arranged behind the main body case 1, and the sheet feeding device stores recording sheets such as printing sheets and stencil printing sheets. ing. Then, by rotating the conveying roller 15, the recording paper supplied from the paper feeding device between the conveying roller 15 and the pressure contact roller 16 is conveyed between the thermal head 5 and the platen 2. Has been done. Further, above the platen 2, a paper discharge roller 17 for guiding the recording medium after recording is arranged. Each of these rollers functions as a paper feed mechanism for carrying the recording paper.

Further, in this embodiment, a control section 21 for controlling the recording operation is provided.

FIG. 3 is a block diagram showing the control unit 21.

The control unit 21 for controlling the printing of the thermal transfer printer of this embodiment determines the correction step number in accordance with the basic step number table for determining the basic step number for one line feed and the driving step number. ROM as a storage means for storing the correction step number table, recording conditions suitable for each type of recording paper used, and the like.
22, a RAM 23 as a storage unit for storing the record information and the number of drive steps of the stepping motor for conveying the sheet when the first recording is performed on the recording paper, and the ROM 22 and RAM 23, which are connected to the basic step number, The number of correction steps, the number of reverse transport steps during reverse transport, and the number of transport steps during the second and subsequent recordings over the first recording are determined to control the drive of the stepping motor, and to drive the thermal head. It is composed of a CPU 24 having a control means for controlling the motor and the carriage drive motor 9. And the C
From the PU 24, a thermal head drive circuit 2 for driving the thermal head 5 having a plurality of recording elements
5, a carriage motor drive circuit 26 for driving a carriage drive motor 9 for reciprocating the carriage 4, and a stepping motor drive circuit for controlling a stepping motor which is a drive source of a paper feeding mechanism for conveying recording paper. A control signal is sent to each 27.

In a printer equipped with an image sensor, a control signal is transmitted to an image sensor drive circuit that drives the image sensor.

Next, the operation of this embodiment will be described.

In this embodiment, a thermal transfer printer as a recording device holds a ribbon cassette 6 containing yellow, magenta, cyan and black ink ribbons, respectively, at a predetermined position of the main body case 1, and print information is recorded in color. In the case of information, recording is performed in order of yellow, magenta, cyan, and black according to the recording information for each color component.

The layout at the time of recording (recording conditions such as left and right margins, recording start position, number of lines in one page, etc.) can be set by a user's external input before the recording is started. It is assumed that the CPU 24 of the control unit 21 determines the number of driving steps of the stepping motor required to convey the recording paper for obtaining the recording result of.

The procedure for recording will be described below.

First, the sheet is set in the sheet feeding device, and the CPU
The stepping motor is driven by the control signal from the control unit 24 to rotate and drive the carry roller 15, so that the carry roller 15 and the pressure contact roller 1 from the paper feeding device are driven.
The recording start position (line) of the recording paper supplied between the thermal head 5 and the platen 2 is conveyed.

Thereafter, while the thermal head 5 is in pressure contact with the platen 2, the carriage driving motor 9 is driven to move the carriage 4, and the winding bobbin 7 is rotationally driven to wind the ink ribbon. Based on the recording information of the yellow ink, the thermal head 5
The desired heating is performed on the printing paper by selectively heating the heating elements of the above.

That is, in the thermal transfer printer having the above-mentioned structure, when the recording start position (row) of the recording paper separated and fed from the paper feeding device is conveyed between the thermal head 5 and the platen 2, The CPU 22 outputs a recording information signal of yellow ink to the thermal head drive circuit 25, and the thermal head 5 generates heat based on the signal, so that the first line of yellow ink is the first ink color on the recording paper. Minutes can be recorded.

When the recording for one line is completed, the carriage 22 maintains its position, and the CPU 22 outputs a head-up signal for separating the thermal head 5 from the recording paper to the thermal head drive circuit 27, and the carriage A drive signal is output to the motor drive circuit 29, the carriage 3 is moved in the direction opposite to that at the time of recording and returned to the recording start position, and then stepping, which is the drive source of the paper feed mechanism, is carried out to the transport motor drive circuit. A signal for driving the motor by the number of basic steps corresponding to one line feed satisfying the set recording condition is output, and the recording paper is conveyed by one line feed in a direction intersecting the scanning direction of the recording paper.

In this way, the recording operation for each line and the line feed operation are repeated to complete the first recording operation using the yellow ink.

As described above, the basic step number is determined from the numerical value of the basic step number table recorded in the ROM 22 according to the desired layout set by the user before the start of recording.

By the end of the recording with the first yellow ink, the recording paper is conveyed as the line feed is started according to the recording information by the driving of the stepping motor. The total number of driving steps required is recorded in the RAM 23.

For example, when the user desires a layout in which the upper and lower margins of the recording paper are set to 30 mm and 40 lines are recorded between them, the record information of the page is only for the first 10 lines. In this case, the recording on the recording paper is performed only on the upper quarter of the recording paper. In that case, the number of driving steps of the stepping motor that conveys the recording paper is approximately 1/4 of the number of driving steps required to convey one recording paper. On the other hand, even if the same 10 lines of information are recorded, if the upper and lower margins of the recording paper are set to 30 mm and the recording of 10 lines is equally spaced between them, the recording paper The number of driving steps of the stepping motor for carrying is the number of driving steps required for carrying one recording sheet.

Thus, in this embodiment, the CPU 24
In order to record with the layout desired by the user, the basic number of steps required for line feed for that one line is RO
It is determined from the basic step number table stored in M22, and the total number of driving steps actually used for recording is stored in the RAM23.

Then, the number of reverse carrying steps after the first recording with the yellow ink is obtained from the number of driving steps stored in the RAM 23 in the CPU 24.

In other words, in the present embodiment, after the first recording is completed, the recording start position (row) is set to the thermal head 5 and the platen so that the recording with the next ink color (magenta) is performed in superposition with the first recording. The number of reverse conveyance steps required for the reverse conveyance of the recording paper when the sheet is conveyed to and from 2 is determined as the number of steps smaller than the number of driving steps by the number of correction steps, and the number of correction steps is stored in the ROM 22. From the stored correction step number table, the correction step number is obtained based on the driving step number.

Specifically, in the correction step number table, the correction step number corresponding to the driving step number in consideration of shrinkage of the recording paper which occurs when recording is performed by the thermal transfer method is recorded. In the step number table, for example, the number of driving steps is 1260 to 1300.
In this case, if the correction step number is set to 40, the actual driving step number is 1 when printing on the recording paper.
When 280 is counted, the number of correction steps is determined to be 40, and the number of reverse transport steps is calculated as 1240 steps from the calculation formula of 1280-40 (steps).

In the correction step number table, as described above with reference to an example, when the recording information is concentrated on the upper part of the recording paper and the driving step number is small, the correction step number also depends on the driving step number. Needless to say, it is set so as to be less.

A control signal is output from the CPU 24 to the transport motor drive circuit so as to rotate the stepping motor in the reverse direction by the reverse transport step number thus obtained, and the recording paper is transported in the reverse direction.

At this time, the recording paper is slightly contracted due to the heat generated by the heating element of the thermal head due to the first recording with the yellow ink, and thus it is obtained as described above. By driving the stepping motor with the number of reverse conveying steps smaller than the number of driving steps, the first recording start position (row) of the recording paper can be returned between the thermal head and the platen.

After that, the ribbon cassette 6 in which the yellow ink ribbon mounted on the carriage is stored is replaced with the ribbon cassette in which the magenta ink ribbon is stored, and the magenta recording signal is transferred from the top of the yellow recording. Based on the above, recording is performed by the same operation as the above-described yellow recording.

In the present embodiment, the number of conveyance steps when performing the second and subsequent recordings on this recording paper is the number of line feeds at the time of first recording, which is the correction step number based on the basic step number for one line feed previously obtained. The number of steps is reduced by the amount dispersed in the above, and is calculated by the CPU 24. That is,
The basic step number for one line feed is A, the correction step number is N,
When the number of line feeds at the time of the first recording is M, the number of conveyance steps can be calculated by the formula A-N / M.

In this embodiment, for example, the basic step number for one line feed is 32 steps and the correction step number is 40.
If the number of line feeds at the time of the first recording is 40 lines, the number of conveyance steps is 32- (40/40).
From the calculation formula, it means that there are 31 steps.

A control signal is output from the CPU 24 to the transport motor drive circuit so as to drive the stepping motor by the number of transport steps thus obtained, and the recording paper is transported for each line feed.

At this time, since the recording paper is initially recorded with the yellow ink as described above,
Since contraction occurs due to heat generation of the thermal head, by driving the stepping motor with a transport step number that is less than the basic step number for one line feed obtained as described above, each line of yellow ink It is possible to superimpose and record magenta ink on each print line.

After recording based on the magenta recording signal,
Similarly, the cyan ink ribbon is used to perform recording based on the cyan recording signal, and the cyan ink ribbon is used to perform recording based on black recording information using the black ink ribbon. The number of carrying steps at the time of recording with the cyan and black inks is the same as the number of carrying steps at the time of the second recording, that is, the recording with magenta ink. This is because the contraction of the recording paper occurs only in the first recording on the recording paper.

By doing so, it is possible to prevent the occurrence of ink deviation due to the conveyance of the recording paper in the recording from the recording start line to the recording end line, and it is possible to obtain a good recording result.

It should be noted that the numerical values representing the number of steps specifically shown in the above-described embodiment are merely examples, and needless to say are not limited to these numerical values.

Although the recording apparatus has been described using the printer equipped with the thermal head, in the case of the ink jet type recording apparatus, contrary to the case of the above-mentioned embodiment,
Since the recording paper will be slightly expanded by the water content contained in the ejected ink, the number of reverse transport steps is set to be larger than the number of correction steps included in the ROM 22 of the control unit of the recording apparatus. If the number of basic steps for one line feed is A, the number of correction steps is N, and the number of line feeds at the first recording is M, the number is calculated as A + N / M.
The drive of the stepping motor is controlled by the CPU 24.

Further, it is conceivable that the amount of contraction or extension of the recording paper as described above varies depending on the operating environment of the recording apparatus, such as humidity or the type of recording paper. Therefore, it is also possible to provide the CPU 24 with a correction means for judging the correction step number from the recording result or the like and further finely adjusting the correction step number by external input or the like.

Further, the correction step number table and the like are not stored in the control section, and the number of driving steps is sequentially adjusted by the contraction rate or the extension rate of the recording paper to obtain the reverse carrying step number and the carrying step number. Good. In that case, the contraction rate and the extension rate may be set by the user as described above.

In this embodiment, the reference position for controlling the paper feed is set as the recording start position (row), and the number of transport steps from the recording start position is always corrected. In addition, in addition to the recording start position (row), a position (line) serving as a reference for paper feed control is provided in several lines at appropriate line intervals, and fine correction of the number of conveyance steps is performed on the recording paper. It is also possible to do so.

[0060]

As described above, the recording apparatus and the paper feed control method therefor according to the present invention, when the recording information is obtained by superposing the ink on the recording medium and recording the ink a plurality of times, the respective inks are recorded. Positional deviation is prevented and good recording results can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a recording apparatus according to the present invention.

FIG. 2 is a side view showing an embodiment of a recording apparatus according to the present invention.

FIG. 3 is a block diagram showing an embodiment of a control unit of the recording apparatus according to the present invention.

[Explanation of symbols]

1 body case 2 Platen 3 Carriage shaft 4 carriage 5 thermal head 6 Ribbon cassette 7 winding ribbon 8 Delivery ribbon 9 Carriage drive motor 10 Output shaft 11 Drive pulley 12 Driven pulley 13 Carriage drive belt 14 Roller shaft 15 Conveyor roller 16 Pressure roller 17 Paper ejection roller 21 Control unit 22 ROM 23 RAM 24 CPU 25 Thermal head drive circuit 26 Carriage motor drive circuit 27 Stepping motor drive circuit

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41J 11/42

Claims (7)

(57) [Claims] 1. A recording head for recording on a recording sheet, a recording head drive circuit for driving the recording head, a carriage on which the recording head is mounted and which is reciprocally movable, and the carriage is reciprocally moved. A carriage motor drive circuit for driving a carriage motor for
The recording medium has a paper feed mechanism for conveying recording paper by driving a stepping motor, a stepping motor drive circuit for driving the stepping motor, and a control section for controlling the printer, and the first recording of the set line on the recording paper. Then, the recording paper is conveyed in the reverse direction to the first recording start position, and the desired recording information is recorded by performing the recording of the second and subsequent setting lines on top of the first recording recorded on the recording paper. In the recording apparatus configured to obtain, the control unit includes a storage unit that stores the data to be used for recording and the number of driving steps of the stepping motor required to convey the sheet when the first recording is performed on the recording sheet. During reverse conveyance after the first recording, the reverse conveyance of the recording paper is performed by the number of reverse conveyance steps according to the expansion and contraction of the recording paper in the first recording. In addition to controlling the drive of the stepping motor, at the time of the second and subsequent recordings overlaid on the first recording, the number of steps corresponding to the expansion and contraction of the recording paper in the first recording is divided by the number of line feeds required for recording the recording paper. And a control unit for controlling the drive of the stepping motor so that the recording paper is conveyed by the number of conveyance steps for one line feed corrected by the above. 2. A recording head for recording on recording paper, a recording head drive circuit for driving the recording head, a carriage on which the recording head is mounted and which is reciprocally movable, and the carriage is reciprocally moved. A carriage motor drive circuit for driving a carriage motor for
The recording medium has a paper feed mechanism for conveying recording paper by driving a stepping motor, a stepping motor drive circuit for driving the stepping motor, and a control section for controlling the printer, and the first recording of the set line on the recording paper. Then, the recording paper is conveyed in the reverse direction to the first recording start position, and the desired recording information is recorded by performing the recording of the second and subsequent setting lines on top of the first recording recorded on the recording paper. In the recording apparatus configured to obtain, the control unit includes a storage unit that stores the data to be used for recording and the number of driving steps of the stepping motor required to convey the sheet when the first recording is performed on the recording sheet. During reverse transport after the first recording, the number of drive steps required to transport the recording paper during the first recording is corrected by the correction step according to the number of drive steps. The stepping motor drive is controlled so that the recording paper is conveyed in the reverse direction by the reverse conveyance step number corrected by the number of flips. And a control means for controlling the drive of the stepping motor so that the recording paper is conveyed by the number of conveyance steps in which the number of basic steps for line feed is corrected by the number of correction steps and the number of line feeds at the time of first recording. A recording device characterized by. 3. The control unit further includes a basic step number table for determining a basic step number for one line feed and a correction step number table for determining a reverse transport step number and a transport step number. The recording device according to claim 2, further comprising a storage unit. 4. The number of reverse conveying steps after the first recording is a number smaller than the number of driving steps by the number of correction steps, and the number of conveying steps when performing the second and subsequent recordings on this recording paper. The number of basic steps for one line feed is A, the number of correction steps is N, and the number of line feeds at the time of first recording is M, which is the number of A-N / M steps. Item 5. The recording device according to item 3. 5. The number of reverse transport steps after the first recording is the number of steps greater than the number of drive steps by the number of correction steps, and the number of transport steps when performing the second and subsequent recordings on this recording paper is 4. The number of steps is A + N / M, where A is the number of basic steps for one line feed, N is the number of correction steps, and M is the number of line feeds at the first recording. The recording device according to 1. 6. The recording apparatus according to claim 2, further comprising a correction unit that corrects the number of correction steps according to a usage environment of the recording apparatus. 7. A carriage carrying a recording head is reciprocally moved along a platen to finish recording for one line, and then a stepping motor is controlled to carry one line feed of the recording paper in a basic number of steps. After the first set line is recorded on the recording paper by repeating the above, the stepping motor is controlled to reversely convey the recording paper to the first recording start position, and the recording is performed on the recording paper. A method of controlling the paper feed, wherein the second and subsequent set lines are recorded on top of the first recording, and the stepping motor used for transporting the first recording on the recording paper is driven. Remember the number of steps,
When the recording sheet is conveyed backward after the first recording, the driving step number is corrected by the correction step number to obtain the backward conveying step number, and the recording sheet is conveyed backward by the backward conveying step number. While controlling the driving of the stepping motor, and when performing the second and subsequent recordings on top of the first recording, the basic step number is corrected according to the correction step number and the number of line feeds at the time of the first recording, and then the sheet is conveyed. A paper feed control method characterized in that the number of steps is obtained, and the driving of a stepping motor is controlled so that one line feed of the recording paper is carried by the number of carrying steps.