JP2007290348A - Printing control method for printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that the use of an inexpensive rotary encoder, instead of an expensive linear sensor which is usually employed for generating printing element driving timing, causes a printing range to fluctuate owing to the deviation of the amplitude quantity of a hammer bank caused by the dimension tolerance of a crank eccentricity and raises a degradation in printing quality. <P>SOLUTION: A printing device is equipped with a plurality of printing element driving timing data corresponding to the dimension tolerance of the quantity of crank deviation, and an optimum printing element driving timing datum is established according to the crank eccentricity of individual equipment, to correct the printing range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printing control method for a printing apparatus having a shuttle mechanism using a crank.

  In a printing apparatus having a shuttle mechanism using a crank and reciprocatingly moving a hammer bank provided with a plurality of printing elements (for example, dot printing hammers) with this shuttle mechanism, a member whose operation is synchronized with the shuttle mechanism A method has been developed in which the actual position of a printing element is predicted using a position signal of a linear motion position sensor (hereinafter referred to as a linear sensor) to generate printing element drive timing (Patent Document 1). , See Patent Document 2).

  In addition, an adjustment method has been developed to prevent print quality deterioration due to part play and mounting errors by adjusting the print start position (hereinafter referred to as fading adjustment) (see Patent Document 3).

  FIG. 2 shows an example of a configuration of a crank type shuttle mechanism using a linear sensor. The eccentric cam 22 attached to the motor shaft by the motor 31 is rotated in the direction of arrow A. The hammer bank 20 integrated with the shuttle mechanism and the crank 21 attached to the eccentric cam 22 are moved to the arrow B. Reciprocate in the girder direction as shown. The diameter of a circle whose radius is the difference in distance between the crank center position and the motor shaft center (hereinafter referred to as the crank eccentric amount) as shown in the upper left of FIG. 2 is the amplitude of the reciprocating motion of the hammer bank 20.

  The linear sensor 32 is disposed on a member (an arm 33 in this example) whose operation is synchronized with the hammer bank 20 and can recognize the exact position of the hammer bank 20 by synchronizing with the linear motion of the hammer bank 20. Therefore, when the hammer bank 20 moves, a printing element driving timing is generated based on a signal output from the linear sensor 32 at every predetermined displacement, and the generated printing element driving timing is directed toward the printing paper by the printing element driving circuit. As a result, the printing element is driven and printing is performed.

  FIG. 3 shows an example in which the sensor signals of the linear sensor 32 are output at 1/180 inch intervals and the drive timing of the printing element is generated at 1/180 inch intervals, that is, 180 dpi. Time is measured at 1/180 inch intervals, and the drive timing of the printing element is generated from the measured time (for example, t1, t2, t3). By using the linear sensor 32, the printing position can be monitored directly from the reciprocating motion of the hammer bank 20. Therefore, a predetermined amount can be used regardless of the deviation of the amplitude amount in the reciprocating motion of the hammer bank 20 caused by the dimensional tolerance of the eccentric cam 22. Printing to the position becomes possible.

JP 2000-127509 A Japanese Patent Application Laid-Open No. 2002-337412 Japanese Patent Laid-Open No. 10-16303

  In a conventional printing apparatus having a shuttle mechanism using a crank, the printing element drive timing is generated using the position signal of the linear sensor. However, a high-resolution linear sensor required for ensuring print quality is In general, the cost is high, and there is a problem that the equipment is expensive. In order to solve this problem, a method of generating the drive timing of the printing element using an inexpensive rotary encoder attached to a motor shaft or the like without using an expensive linear sensor can be considered.

  FIG. 10 shows an example of the configuration of a crank-type shuttle mechanism using a rotary encoder. The eccentric cam 22 attached to the motor shaft by the motor 31 is rotated in the direction of arrow A. The hammer bank 20 integrated with the shuttle mechanism and the crank 21 attached to the eccentric cam 22 are moved to the arrow B. Reciprocate in the girder direction as shown. Similar to the configuration of the linear sensor described above, the diameter of a circle whose radius is the crank eccentric amount as shown in the upper left in the figure is the amplitude of the reciprocating motion of the hammer bank 20.

  The rotary encoder 30 can recognize the reverse position of the hammer bank 20 by synchronizing with the rotational motion of the motor 31. Therefore, as shown in FIG. 4, the reverse position of the hammer bank 20 is detected by the home signal of the rotary encoder 30, and the print element drive timing data is set based on the set print element drive timing data based on the reverse position. Print out the drive timing. Note that the signal of the rotary encoder 30 may be output at an arbitrary interval, and the drive timing of the printing element may be generated based on this. In this way, the printing element drive timing is generated based on the signal output from the rotary encoder 30 as the hammer bank 20 moves, and the printing element is printed through the printing element drive circuit according to the generated printing element drive timing. It is driven toward the paper and printing is performed.

  However, when an inexpensive rotary encoder is used without using an expensive linear sensor, the rotation angle of the motor can be recognized, but the amount of amplitude of the hammer bank cannot be detected. The deviation of the amplitude amount of the hammer bank due to the dimensional tolerance appears in the printing result as it is, the printing range fluctuates, and the printing quality is deteriorated. The deterioration in printing quality due to the dimensional tolerance of the crank eccentric amount can be solved by tightening the dimensional accuracy of parts such as the eccentric cam and the crank. In this case, however, the unit cost increases and the cost increases.

  As shown in FIG. 5, when the correction of the printing range, for example, the correction (a) → (c) for narrowing the printing range, individual adjustment is required at each interval of all printing element driving timings. On the other hand, in the fading adjustment (b) that has been conventionally used for the purpose of preventing deterioration in print quality, the interval between the print element drive timings is not changed, and individual adjustment cannot be performed. Therefore, the print range cannot be corrected based on the dimensional tolerance of the crank eccentric amount, and the print quality cannot be prevented from being deteriorated.

  As described above, an object of the present invention is to correct the deviation of the printing range due to the dimensional tolerance of the crank eccentric amount without increasing the cost and to prevent the deterioration of the printing quality. It is another object of the present invention to correct printing range deviations due to changes in internal temperature or changes with time, and to prevent deterioration in print quality.

  The invention according to claim 1 of the present invention for solving the above-mentioned problems uses a hammer bank which is mounted with a plurality of printing elements and reciprocates along the girder direction, and a crank for reciprocating the hammer bank. In a printing apparatus equipped with a shuttle mechanism, the printing range can be corrected by setting optimum data from a plurality of types of printing element drive timing data for deviations in the printing range due to dimensional tolerances of crank eccentricity. Features.

  According to a second aspect of the present invention, in the first aspect of the present invention, printing is performed at the same position by adjacent printing elements in the printing range, and optimum data is set from the printing element drive timing data according to the printing result. The printing range is corrected by the above.

  According to a third aspect of the present invention, in the first aspect of the present invention, the printing apparatus has a plurality of printing modes, each of the printing modes has a plurality of types of printing element drive timing data, and each printing mode has Printing element drive timing data is set.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the correction value for the temperature change is added to the printing element drive timing data in response to the temperature change in the apparatus. The printing range deviation due to the temperature change in the machine is corrected.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects, a correction value for a change with time is added to the print element drive timing data to thereby adjust a print range due to a change with time. It is characterized by correcting the deviation.

  The invention described in claim 6 of the present invention is characterized in that, in the invention described in claim 5, a cumulative printing time counter is provided, and the deviation of the printing range due to change with time is automatically corrected according to the cumulative printing time. To do.

  According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the printing apparatus has a cumulative home signal counter, and automatically prints out a deviation of a printing range due to a change with time in accordance with a cumulative motor rotational speed obtained from the cumulative home signal number. It corrects automatically.

  According to an eighth aspect of the present invention, in the invention according to the fifth aspect, the deviation of the printing range due to a change with time is corrected by a combination of the cumulative printing time and the cumulative motor rotation speed.

  A ninth aspect of the present invention is the printing control method for a printing apparatus according to any one of the first to eighth aspects, wherein the printing apparatus transports printing paper in a direction perpendicular to the digit direction. Printing on printing paper disposed via an ink ribbon by driving a printing element in the process of reciprocating movement of the hammer bank. It is characterized by performing.

  According to the present invention, it is possible to prevent a decrease in print quality due to a dimensional tolerance of the crank eccentric amount without using an expensive linear sensor and without tightening the dimensional accuracy of parts. In addition, it is possible to correct for variations in the printing range due to temperature changes in the printing apparatus or changes with time, and print quality can be maintained.

  First, an outline of a printing apparatus having a shuttle mechanism portion using a crank used in the present invention and reciprocating a hammer bank provided with a plurality of printing elements by the shuttle mechanism portion will be described.

  FIG. 11 shows an example of a schematic configuration of the printing apparatus. A hammer bank 51 having a plurality of printing elements (not shown) rotates an eccentric cam 60 attached to the motor shaft by a motor 59 in the direction of arrow E, and a crank 61 attached to the hammer bank 51 and the eccentric cam 60. As a result, the hammer bank 51 is reciprocated in the girder direction as shown by an arrow C. Further, the hammer bank 51 is disposed so as to face the platen 54 for supporting the printing force via the ink ribbon 52 and the printing paper 53. Each time a plurality of printing elements are driven in a timely manner during the reciprocating motion of the hammer bank 51, characters, figures, etc. are printed on the printing paper 53 in the form of a dot matrix. In the printing process, the printing paper 53 is fed in the row direction (D direction in the drawing) at appropriate times by a paper feeding mechanism unit 56 including a tractor 55 and a paper feeding motor 57. Control of these operations is performed by a control device 62 described later.

  FIG. 12 shows a schematic configuration of the hammer bank 51. The hammer bank 51 is composed of a plurality of printing elements, each of which has a configuration in which a hammer pin 71 is attached to the tip of the leaf spring 70, and the bending energy previously given to the leaf spring 70 is released by the release electromagnetic coil 72. Then, dot printing is performed on the printing paper 76 via the ink ribbon 75. Then, the plate spring 70 repeats a series of operations until it returns to the contact position with the comb yoke 74 by the return of the magnetic attractive force of the permanent magnet 73 to perform printing.

  The printing apparatus having the above configuration has a plurality of types of printing modes. For example, the first print mode is a normal print mode that prints 16-dot size characters at a rate of 200 lines / minute, and the second print mode is a high-quality print that prints 24 dot-size characters at a rate of 100 lines / minute. The print mode and the third print mode are high-speed print modes for printing 12-dot size characters at a speed of 350 lines / minute. By appropriately using these, it is possible to perform printing suitable for the purpose.

  Next, FIG. 1 shows an extracted control circuit of a part related to the present invention in the control device 62 described above.

  In the control circuit of this example, the timer 4 that is connected to the rotary encoder 1 and measures the time from the home signal input, the time data measured by the timer 4 and the print element drive timing data are compared, and printing is performed when the values match. Comparator 6 that outputs a signal to element drive timing generation means 7, print element drive timing generation means 7 that receives a signal from comparator 6 and drives a print element, and print element drive timing data as required A printing element driving timing correction unit 2 that performs correction and outputs the printing element driving timing data to the comparator 6 is provided.

  Further, the configuration of the printing element driving timing correction unit 2 holds a plurality of printing element driving timing data for each printing mode, and also sets values corresponding to the printing element driving timing data (for example, the printing mode). Separately from 0 to 24), print element drive timing data holding means and setting value holding means 3 for each print mode for storing a value corresponding to the selected print element drive timing data as a set value, and print element drive for each print mode An adder 5 that adds a correction value to the printing element drive timing data output from the timing data holding means and set value holding means 3 as needed, and senses the temperature inside the machine and holds the temperature value as temperature change correction data. In-machine temperature sensing means 8 to be sent to means 11, and the in-machine temperature sent from in-machine temperature sensing means 8 is maintained. A temperature at which correction is determined from the threshold value, and when correction is necessary, optimum correction data is selected from correction data corresponding to the in-machine temperature that is held, and the correction data is sent to the adder 5 to be corrected. The change correction data holding means 11, the accumulated home signal counter 9 for counting the number of home signal inputs and sending the accumulated home signal input number to the time change correction data holding means 12, and the time change correction data holding means for counting the number of printing times 12, whether the correction is necessary or not is determined based on the stored threshold value with respect to the values from the cumulative printing time counter 10 that sends the cumulative printing time number to 12, the cumulative home signal counter 9, and the cumulative printing time counter 10. In this case, it comprises the time-varying correction data holding means 12 which selects the optimum correction data from the held correction data, sends it to the adder 5 and applies correction.

  Further, the crank eccentricity correction mode automatic setting unit 13 includes a crank eccentricity correction mode detection unit 15 for recognizing a print result of a crank eccentricity correction mode described below, and a crank eccentricity recognized by the crank eccentricity correction mode detection unit 15. Crank eccentricity that selects the optimum set value of the crank eccentricity correction mode from the print result of the amount correction mode and sets the set value for each print mode in the print element drive timing data holding means and the set value holding means 3 for each print mode. It consists of a quantity correction mode set value selection means 14.

  In the above configuration, the printing element driving timing correction unit 2 sets the optimum printing element driving timing data for each printing mode described above, and according to the printing element driving timing data set based on the home signal of the rotary encoder 1. By generating the printing element drive timing and printing, the deviation of the printing range is corrected.

  More specifically, a plurality of types (for example, 25 types) of printing element driving timing data for each printing mode are put in the printing element-specific printing element driving timing data holding unit and set value holding unit 3, and the rotary encoder 1 The timer 4 is reset by the output home signal, and the value of all printing element driving timing data corresponding to the printing position shown in FIG. 6 is read from all the printing element driving timing data for each printing mode. The print element drive timing is generated by using the print element drive timing generation means 7 at the time when the value of the print element and the value of the print element drive timing data coincide with each other, and the print element is driven to perform printing as shown in FIG. . That is, the printing element A is printed by moving the hammer bank in the first direction using the printing elements adjacent to each other in the printing range as indicated by the printing elements A and B, and then a predetermined amount of paper is fed. Further, the hammer bank is moved in the second direction opposite to the first direction, printing is performed on the printing element B adjacent to the same position as that previously printed by the printing element A, and the above is repeated (crank). Called the eccentricity correction mode).

  Then, the crank eccentricity correction mode automatic setting unit 13 sets the optimum printing element drive timing data for each printing mode from the printing result, resets the timer 4 by the home signal output from the rotary encoder 1, and prints the printing mode. The set print element drive timing data values are sequentially read from the separate print element drive timing data holding means and the set value holding means 3, and the value of the timer 4 and the set print element drive timing data value match in the comparator 6. The printing element driving timing is generated using the printing element driving timing generation means 7 and the printing element is driven to perform printing, thereby correcting the deviation of the printing range due to the dimensional tolerance of the crank eccentric amount in each printing mode. can do.

  In this example, the crank eccentricity correction mode automatic setting unit 13 is provided to perform automatic correction. However, the optimum printing element driving timing data is visually selected for each printing mode, and the selected printing element driving timing data is selected. Corresponding set values may be directly set in the printing element drive timing correction unit by a certain input means (for example, button input).

  Hereinafter, the crank eccentric amount correction mode and the correction method thereof will be described. The crank eccentricity correction mode has a plurality of types (for example, 25 types) for each printing mode.

  7 and 8 show an example of the crank eccentricity correction mode. FIGS. 7 and 8 show the case of the reference crank diameter, and printing element drive timing data (crank eccentricity correction mode B) that is not corrected at an ideal crank diameter having no dimensional tolerance. ) Does not cause misalignment of the printing position in the digit direction.

  However, as shown in the lower part of FIG. 7, for example, when the crank eccentric amount is smaller than the reference crank diameter (indicated by the dotted line in the figure), which is the median value of the dimensional tolerance of the crank eccentric amount, normal printing element drive timing data When (reference print timing) is used, the print range becomes narrow, and a gap is generated between the print ranges of adjacent print elements, resulting in a deviation in the print result. Therefore, in the case of FIG. 7, since the print range is narrower than the reference print range, as shown by the arrow X, the print element drive timing data that has been corrected to widen the print range by increasing the interval between the print element drive timings, That is, the crank eccentric amount correction mode A is used to correct the print range to an appropriate value.

  On the other hand, as shown in FIG. 8, when the crank eccentric amount is larger than the reference crank diameter, the print range is widened at the normal print timing, and the print results are shifted by overlapping the print ranges of adjacent print elements. Therefore, the printing range is corrected by resetting to the printing element driving timing obtained from the angle of the printing position corresponding to the crank eccentric amount. In the case of FIG. 8, since the print range is wider than the reference print range, the print element drive timing data that has been corrected to narrow the print range as indicated by the arrow Y, that is, proper printing using the crank eccentricity correction mode C is used. Correct to range.

Note that the correction of the printing range is performed by resetting the printing element driving timing obtained from the angle of the printing position corresponding to the crank eccentric amount in accordance with the concept shown in FIG. That is, when the printing range of the reference crank diameter is set to the reference printing range (180 ° −2θ ₁ ) and the angle corresponding to the printing position is determined to determine the printing element drive timing, The print range also changes. Therefore, each of the printing ranges according to the crank eccentricity (180 ° −2θ ₂ ): a printing range correction example for a large eccentricity amount (180 ° −2θ ₃ ): a printing range correction example for a small eccentricity amount, and further individual printing The position can also be adjusted so that the printing timing corresponds to the change in the crank eccentric amount by resetting the angle of the printing element driving timing according to the correction of the printing range.

  Then, the print element drive timing data that minimizes the print position deviation in the digit direction as described above is visually determined from the print result or the crank eccentricity correction mode automatic setting unit 13 shown in the lower part of FIG. The amount correction mode detection means 15 recognizes the print result of the crank eccentricity correction mode, and the crank eccentricity correction mode setting value selection means 14 selects the optimum set value of the crank eccentricity correction mode from the print result. The set value is set for each print mode in the separate print element drive timing data holding means and the set value hold means 3, and the print element drive timing data for each print mode corresponding to the set value of the crank eccentricity correction mode is used. The timer 4 is reset by the home signal output from the rotary encoder 1, and the print mode is The print element drive timing data value after setting is sequentially read from the individual print element drive timing data holding means and the set value holding means 3, and the value of the timer 4 and the set print element drive timing data value are compared in the comparator 6. By generating the printing element driving timing by using the printing element driving timing generation means 7 at the coincidence time, and printing by driving the printing element, the deviation of the printing range due to the dimensional tolerance of the crank eccentric amount in each printing mode can be obtained. It can be corrected. The correction in the crank eccentricity correction mode is generally performed at the time of shipment or maintenance.

  If the value of the in-machine temperature sensed by the in-machine temperature sensing means 8 exceeds a threshold value (for example, 50 ° C.) of the temperature change correction data holding means 11, the home signal of the rotary encoder 1 is used as a reference. Then, the value of the correction data is sequentially sent from the temperature change correction data holding means 11 to the adder 5 and is automatically added to the value of the print element drive timing data by the adder 5. The print element drive timing is generated by using the print element drive timing generation means 7 at the time when the values of the changed print element drive timing data coincide with each other. The deviation can be corrected.

  On the other hand, there are two types of changes with time. The change can be caused by the accumulated printing time in which the parts deteriorate with the printing time, and the change by time due to the wear of the parts due to the accumulation of shuttle mechanism reciprocation, that is, the accumulation of motor rotation speed. However, in this example, since there are a plurality of types of printing modes, the correspondence between the cumulative printing time and the cumulative motor rotation speed is not established. Therefore, in this example, when the value of the accumulated printing time counter 10 becomes a certain value (for example, every 1000 hours) or more, or the accumulated motor rotation number obtained from the accumulated home signal counter 9 is a certain value (for example, every 400 million rotations). The time-varying correction data holding unit 12 has both values as above as threshold values, and when one of the threshold values is exceeded, the time-varying correction data holding unit 12 is based on the home signal of the rotary encoder 1. The value of the correction data is sequentially sent to the adder 5 and automatically added to the printing element drive timing data by the adder 5, and the value of the timer 4 and the changed printing element drive timing data in the comparator 6 match. At the place, the printing element driving timing generation means 7 is used to generate the printing element driving timing, and the printing element is driven to print. Thus, the deviation of the printing range due to the change with time is corrected. It should be noted that the print range may be corrected due to changes over time depending on either the cumulative printing time or the cumulative motor rotation speed.

  With the above configuration, it is possible to prevent deterioration in print quality due to deviation of the print range due to dimensional tolerance of the crank eccentric amount without using an expensive linear sensor and without strict dimensional accuracy of parts. Furthermore, it is possible to correct for variations in the printing range due to temperature changes in the printing apparatus or changes with time, and print quality can be maintained.

  In a printing apparatus equipped with a shuttle mechanism that uses a crank, it has multiple types of printing element drive timing data according to the dimensional tolerance of the crank eccentricity, and the optimum printing element drive according to the crank eccentricity of each device By setting the timing data and correcting the printing range, the print quality can be reduced due to the deviation of the printing range due to the dimensional tolerance of the crank eccentricity, and the dimensional accuracy of the parts can be strictly controlled without using an expensive linear sensor. It can be prevented without doing. In addition, it is possible to correct for variations in the printing range due to temperature changes in the apparatus or changes with time, and print quality can be maintained.

FIG. 3 is a control block diagram for implementing the printing control method of the present invention. Schematic which shows an example of a structure of the shuttle mechanism part of the crank system using a linear sensor. 6 is a timing chart of a printing element drive timing generation method when a linear sensor is used. The timing chart of the printing element drive control method at the time of using a rotary encoder. Explanatory drawing which shows the difference with the printing range correction | amendment of this invention, and the conventional fading adjustment. 7 is a print pattern example executed in the crank eccentricity correction mode of the present invention. Explanatory drawing which shows the specific example (small eccentricity amount) of the crank eccentricity correction mode of this invention. Explanatory drawing which shows the specific example (large eccentricity) of the crank eccentricity correction mode of this invention. Explanatory drawing about the correction method of a printing range (and printing element drive timing). Schematic which shows an example of a structure of the shuttle mechanism part of the crank system using a rotary encoder. FIG. 3 is a perspective view illustrating an example of a schematic configuration of a printing apparatus. FIG. 3 is a cross-sectional view showing a schematic configuration of a hammer bank 51.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Rotary encoder, 2 ... Printing element drive timing correction | amendment part, 3 ... Printing element drive timing data holding means and setting value holding means classified by printing mode, 4 ... Timer, 5 ... Adder, 6 ... Comparator, 7 ... Printing element Drive timing generating means, 8 ... in-machine temperature sensing means, 9 ... cumulative home signal counter, 10 ... cumulative printing time counter, 11 ... temperature change correction data holding means, 12 ... time change correction data holding means, 13 ... crank eccentricity correction Mode automatic setting unit, 14 ... crank eccentricity correction mode setting value selection means, 15 ... crank eccentricity correction mode detection means, 20 ... hammer bank, 21 ... crank, 22 ... eccentric cam, 30 ... rotary encoder, 31 ... motor, 32 ... Linear sensor, 51 ... Hammer bank, 52 ... Ink ribbon, 53 ... Printing paper, 54 ... Plate , 55 ... tractor, 56 ... paper feed mechanism, 57 ... paper feed motor, 59 ... motor, 60 ... eccentric cam, 61 ... crank, 62 ... control device, 70 ... leaf spring, 71 ... hammer pin, 72 ... electromagnetic for release Coil, 73 ... Permanent magnet, 74 ... Com yoke, 75 ... Ink ribbon, 76 ... Printing paper.

Claims (9)

  Dimensional tolerance of crank eccentricity in a printing apparatus having a plurality of printing elements, a hammer bank that reciprocates along a digit direction, and a shuttle mechanism that uses a crank for reciprocating the hammer bank A printing control method for a printing apparatus, wherein the printing range is corrected by setting optimum data from a plurality of types of printing element drive timing data for the deviation of the printing range due to.   2. The printing control method for a printing apparatus according to claim 1, wherein printing is performed at the same position by adjacent printing elements in the printing range, and the printing range is corrected by setting optimum data from the printing element drive timing data according to the printing result. A printing control method for a printing apparatus.   2. The printing control method for a printing apparatus according to claim 1, wherein the printing apparatus has a plurality of printing modes, has a plurality of types of printing element driving timing data for each printing mode, and printing element driving timing for each printing mode. A printing control method for a printing apparatus, characterized in that data is set.   4. The printing control method for a printing apparatus according to claim 1, wherein a correction value for the temperature change is added to the printing element drive timing data in response to the temperature change in the machine to change the temperature in the machine. A printing control method for a printing apparatus, wherein a deviation of a printing range due to the printing is corrected.   4. The printing control method for a printing apparatus according to claim 1, wherein a correction value for a change with time is added to the print element drive timing data to correct a deviation of a printing range due to the change with time. A printing control method for a printing apparatus.   6. A printing control method for a printing apparatus according to claim 5, wherein the printing apparatus has a cumulative printing time counter and automatically corrects a deviation of a printing range due to a change with time according to the cumulative printing time. Print control method.   6. A printing control method for a printing apparatus according to claim 5, wherein the printing apparatus has a cumulative home signal counter and automatically corrects a deviation of a printing range due to a change with time in accordance with a cumulative motor rotational speed obtained from the cumulative home signal number. A printing control method for a printing apparatus.   6. The printing control method for a printing apparatus according to claim 5, wherein a deviation of the printing range due to a change with time is corrected by a combination of the cumulative printing time and the cumulative motor rotation speed.   The printing control method for a printing apparatus according to any one of claims 1 to 8, wherein the printing apparatus includes a paper feed mechanism unit that conveys printing paper in a direction perpendicular to a digit direction, and a printing force of the hammer bank. And a platen for supporting printing, and printing is performed on a printing paper arranged via an ink ribbon by driving a printing element in the process of reciprocating movement of the hammer bank. Print control method.

Images