JP4128901B2 - Printer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a printer device used for printing a passbook, a slip, and the like, and more particularly to correction of a printing position shift.
[0002]
[Prior art]
Printer apparatuses used for printing passbooks and slips are already known. This type of printer device is provided with a sheet feeding means and a print head constituted by rollers, belts, and the like, and various sensors for detecting the position of the sheet. Because there are individual differences inherent to the printer device due to dimensional errors, shape errors, assembly errors, etc. of the various components that make up the printer, characters, ruled lines, etc. are not necessarily printed at the correct print position according to the initial drive conditions set in the printer device. There is no guarantee that it will be done.
[0003]
For example, the print start position in the line direction on the paper is generally defined by the paper feed amount after the paper positioning sensor detects the leading edge of the paper, and this paper feed amount is set based on the design value. However, as long as each part of the printer apparatus does not completely match the design value, a certain degree of error may occur in the print position.
[0004]
In order to deal with such problems, in the conventional printer device, the actual printing operation is performed on the test paper at the time of shipment of the device, and the deviation between the ideal position and the actual position of the printed character is measured. In order to eliminate this deviation, parameters of driving conditions, for example, set values such as a sheet feeding amount are changed.
[0005]
Actually, in addition to misalignment of the print start position in the row direction, there are other problems such as misalignment of the print start position in the column direction and backlash correction when the print head moves forward / backward. Is complicated.
[0006]
For this reason, there has been a demand for automating the measurement of misalignment, the calculation of parameters, and the setting of appropriate values.
[0007]
Printer apparatuses disclosed in Patent Document 1, Patent Document 2, Patent Document 3 and the like have already been used as printer apparatuses that automate the misalignment correction operation using the sheet conveyance function of the printer apparatus itself, the detection function of the sensor, and the like. It is known.
[0008]
[Patent Document 1]
JP-A-4-355174 (paragraph numbers 0004 and 0006)
[Patent Document 2]
JP 2001-225518 A (paragraph number 0008, FIG. 2)
[Patent Document 3]
JP 2000-158773 A (paragraph numbers 0007, 0008, FIG. 4)
[0009]
[Problems to be solved by the invention]
However, all of the printer devices found in these known documents require image processing using an image sensor in order to detect the character printing position and the printing position deviation. When applied to a printer device that does not require recognition, such as a passbook printer device or a slip printer device, the cost of the printer device is disadvantageous.
[0010]
OBJECT OF THE INVENTION
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a printer that can improve the disadvantages of the prior art and can easily carry out correction of misalignment of a printing position by automatic processing even in a printer that does not include an image sensor. It is in.
[0011]
[Means for Solving the Problems]
A printer apparatus according to the present invention includes a sheet feeding unit that feeds a sheet, a print head that moves in a direction crossing the sheet feeding direction, and a reflective barcode read sensor that reads a barcode printed on the sheet. In order to achieve the object,
A paper positioning sensor for detecting the leading edge of the paper;
A sheet feed amount storage means for storing a reference sheet feed amount;
For detecting the paper transport error by detecting the operation of the paper positioning sensor and driving the paper feed means by the reference feed amount stored in the paper feed amount storage means and then causing the print head to perform a printing operation for detecting the paper transport error. Trial printing control means;
After the test printing control means for detecting the paper transport error is activated, The paper feeding means is driven to return the front end of the paper to the near side of the bar code lead sensor. , Paper feeding means Again in the paper transport direction While driving Monitor the signal from the bar code lead sensor to detect the leading edge of the paper, and then A paper feed direction actual print distance measuring means for monitoring a driving amount of the paper feed means and a signal from the bar code read sensor to obtain a separation distance from the front end of the paper to a print position for detecting a paper transport error;
A paper transport deviation detecting means for calculating a deviation between the separation distance obtained by the paper feed direction actual printing distance measuring means and a predetermined ideal separation distance from the front end of the paper to the printing position;
And a paper reference feed amount correcting means for correcting the reference feed amount of the paper feed amount storage means based on the deviation calculated by the paper transport deviation detecting means.
[0012]
In the above configuration, when the paper positioning sensor detects the leading edge of the test paper supplied to the paper feed means, first, the paper transport error detection test print control means is activated, and the reference stored in the paper feed amount storage means. The paper feeding means is driven until the feed amount is reached, and the print head is caused to execute a printing operation for detecting a paper transport error.
Next, the paper feed direction actual print distance measuring means is operated to monitor the drive amount of the paper feed means and the signal from the bar code read sensor while driving the paper feed means to detect the paper transport error from the leading edge of the test paper. The separation distance to the printing position is obtained.
Specifically, the separation distance from the leading edge of the test paper to the print position for detecting the paper conveyance error is determined by rotating the paper feeding means in reverse until the test paper is not detected by the bar code read sensor, and then feeding the paper again. The bar code read sensor detects the leading edge of the test paper and starts the measurement process of the driving amount of the paper feeding means from this detection point. When the bar code read sensor detects the print position, the measurement process is started. Is requested by stopping.
Since the drive source of the paper feeding means is a stepping motor, in actuality, this separation distance is from the time when the bar code read sensor detects the leading edge of the test paper to the time when the bar code read sensor detects the print position. Is represented by the number of pulses input to the stepping motor. More specifically, the reference feed amount stored in the paper feed amount storage means and the ideal separation distance from the front end of the paper to the printing position are actually the stepping that is the drive source of the paper feed means. The number of pulses for the motor.
Next, the paper conveyance deviation detecting means is operated to calculate a deviation between the separation distance obtained by the paper feed direction actual printing distance measuring means and a predetermined ideal separation distance from the front end of the paper to the printing position. This deviation is the value of the number of pulses corresponding to the amount of positional deviation in the paper transport direction.
Finally, the paper reference feed amount correcting means is operated to correct the reference feed amount of the paper feed amount storage means based on the deviation obtained by the paper transport deviation detecting means.
The simplest correction is to rewrite and update the reference feed amount value stored in the paper feed amount storage means, but the reference feed amount value stored in the paper feed amount storage means is set to the initial value. The deviation determined by the paper conveyance deviation detection means is stored separately, and an appropriate reference feed is made based on the initial value and deviation each time in the pre-processing stage of the drive control of the paper feed means from the next time onwards. You may make it ask for quantity.
As described above, it is possible to correct the reference feed amount of the sheet feed amount storage unit by the process using the reflection type barcode read sensor for reading the barcode and the sheet feed unit, and to eliminate the deviation of the print position in the sheet transport direction. Therefore, even in a passbook printer device or a slip printer device that does not include an image sensor, correction of a print position deviation can be easily performed by automatic processing.
[0013]
In addition to the above configuration, a home position sensor that detects a reference position of the print head;
Head movement amount storage means for storing a reference movement amount of the print head;
Head movement error detection that detects the operation of the home position sensor and moves the print head by the reference movement amount stored in the head movement amount storage means, and then causes the print head to perform a printing operation for detecting the print head movement error. Trial print control means,
After the operation of the test printing control means for detecting head movement error, The bar code lead sensor is moved to move the bar code lead sensor to the outside of one side edge of the paper. Bar code lead sensor Move again toward the home position sensor While A signal from the bar code lead sensor is monitored to detect one end of the paper, and then Measurement of the actual print distance in the head movement direction by monitoring the amount of movement of the bar code read sensor and the signal from the bar code read sensor to obtain the separation distance from one side edge of the paper to the print position for print head movement error detection Means,
A head movement deviation detecting means for calculating a deviation between the separation distance obtained by the head movement direction actual printing distance measuring means and a predetermined ideal separation distance from the one side end to the printing position;
A head reference movement amount correction unit that corrects the reference movement amount of the head movement amount storage unit based on the deviation calculated by the head movement deviation detection unit may be provided.
[0014]
This configuration is for eliminating the displacement of the print position in the print head moving direction, and the operation principle thereof is the same as that described above except that the detection direction of the position shift amount is different.
In other words, after the home position sensor detects the reference position of the print head, the print head is moved by the reference movement amount stored in the head movement amount storage means to detect the print head movement error on the test paper. After the printing operation is performed, the movement of the barcode lead sensor and the signal from the barcode lead sensor are monitored while moving the barcode lead sensor, and the print head movement error is detected from one side edge of the paper. The distance between the print position and the print position is calculated, and a deviation between the predetermined distance and the ideal distance from the one side end to the print position is calculated, and the head movement amount is stored based on the deviation. By correcting the reference movement amount of the means, the deviation of the print position in the print head movement direction is eliminated.
As a result, even in a passbook printer device or a slip printer device that is not provided with an image sensor, it is possible to easily carry out correction of the displacement of the print position with respect to the print head moving direction by automatic processing. .
[0015]
Further, after the print head is moved from one side edge of the paper toward a pre-stored target position to cause the print head to perform a first printing operation for backlash detection, While maintaining the stopped state of the paper feeding means Backlash detection test print control means for moving the print head from the other end of the paper toward the previously stored target position and causing the print head to perform a second printing operation for backlash detection;
After the test printing control means for backlash detection is activated, While maintaining the stopped state of the paper feeding means While moving the bar code read sensor, the amount of movement of the bar code read sensor and the signal from the bar code read sensor are monitored, and the first printing position for backlash detection and the second for backlash detection. Backlash detection means for obtaining a separation distance from the second printing;
Backlash correction value storage means for storing the separation distance obtained by the backlash detection means as a backlash correction value can be provided.
[0016]
According to the above configuration, first, the backlash of the power transmission system of the print head is eliminated while the print head is moved from one side edge of the test paper toward the pre-stored target position. A first printing operation is performed on the test paper.
Thereafter, the print head is fed from the first printing position to the other side edge of the test paper while the backlash has been eliminated.
Next, the movement direction of the print head is switched to move the print head toward the target position as described above. However, since backlash exists in the power transmission system, the stepping motor that is the drive source of the print head Even if the rotation direction is reversed, the movement of the print head itself does not start immediately.
Then, when the backlash of the power transmission system is resolved by the reverse rotation of the stepping motor as the drive source, the print head starts to move toward the target position.
Next, when the print head reaches the target position, a second printing operation is performed on the test paper. However, the movement control of the print head is not performed in a closed loop, but is performed in an open loop control for a stepping motor that is a drive source. Therefore, even if the stepping motor rotates by the amount corresponding to the command value, the print head does not actually reach the target position, and the amount corresponding to the backlash described above is set at the other end of the test paper. The robot stops at the approached position, and the second printing operation is performed at this position.
In other words, the positional deviation that occurs between the first printing position and the second printing position is a positional deviation corresponding to the backlash of the power transmission system, so the first printing position and the second printing position. Is stored as a correction value in the backlash correction value storage means, so that the moving direction of the print head is stored in the backlash correction value storage means. It is possible to correct backlash according to the condition.
For example, when adjustment is made so that the print head appropriately reaches the target position when the print head is moved from the one side edge of the paper to the inside of the paper, When the print head is moved to zero, the correction amount is zero, and when the print head is moved from the other side of the paper into the paper, the above-described backlash correction value is added to the incremental movement command. Like that.
[0017]
Further, it is desirable that the bar code lead sensor is disposed on a protector attached to the print head and moved together with the print head.
[0018]
A normal image sensor needs to be installed in the paper conveyance path because of its scale, but a small bar code read sensor can be incorporated in a protector mounted on a print head.
As described above, in order to eliminate the positional deviation in the print head movement direction and the print head backlash, it is necessary to monitor the signal while moving the barcode read sensor. By incorporating the sensor into the protector of the print head, it becomes possible to move both of them together, eliminating the need for a drive means dedicated to the barcode lead sensor, which helps to reduce the manufacturing cost and failure factors of the printer device.
[0019]
Further, the test print control means for detecting the paper transport error is configured to print a horizontal ruled line in the printing operation for detecting the paper transport error, and the test print control means for detecting the head movement error is used to detect the print head movement error. It may be configured to print vertical ruled lines during the printing operation.
[0020]
When such a configuration is applied, the print position is detected while the bar code lead sensor moves in a direction in which the bar code lead sensor moves toward and away from the normal direction of the ruled line representing the print position. This scanning direction is the same as the scanning direction when the barcode read sensor reads the barcode, and high detection accuracy can be ensured.
[0021]
Further, it is possible to arrange a plurality of paper insertion openings corresponding to the paper types in the paper feeding means and store the reference feed amount for each paper type in the paper feeding amount storage means.
[0022]
Since the correspondence between the paper type and the standard feed amount is uniquely specified, it is possible to feed the paper appropriately according to the difference in the friction and thickness of the paper surface, and to shift the print position in the paper feed direction. It can be solved accurately. (Even if the same paper feeding means is used, the difference in the friction or thickness of the paper surface may affect the positional deviation.)
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an outline of a mechanical configuration of a printer apparatus 1 according to an embodiment to which the present invention is applied. FIG. 2 is a simplified diagram of a main part of a control system of the printer apparatus 1 according to the embodiment. It is the functional block diagram shown.
[0024]
As shown in FIG. 1, the printer apparatus 1 includes sheet feeding means 12 including feed rollers 2 to 6 and pinch rollers 7 to 11.
Among them, the feed rollers 2 to 5 and the pinch rollers 7 to 10 are arranged along the first paper transport path 13 and are fed in the direction of arrow a to the passbook (paper) inserted from the passbook paper insertion port 14. Multiply.
Further, the feed roller 6 and the pinch roller 11 are arranged along a second paper conveyance path 15 provided so as to cross the first paper conveyance path 13, and a slip inserted from a paper insertion slot 16 for slips. Multiply (paper) in the direction of arrow a.
The drive source of the feed rollers 2 to 6 is constituted by a stepping motor M1 shown in FIG. 2, and the feed rollers 2 to 6 are rotationally driven all at once in the same direction by the operation of the stepping motor M1.
[0025]
A path switching piece 17 is swingably attached to a portion where the first paper transport path 13 and the second paper transport path 15 intersect. The drive source of the path switching piece 17 is constituted by a rotary solenoid SOL shown in FIG. FIG. 1 shows a state in which the rotary solenoid SOL is de-energized and the second sheet transport path 15 is closed by the path switching piece 17, that is, a state in which the first sheet transport path 13 is used. However, if the rotary solenoid SOL is energized and the path switching piece 17 is swung clockwise in FIG. 1, the first paper transport path 13 is closed and the second paper transport path 15 is used. be able to.
[0026]
A paper detection sensor S1 for detecting insertion of a passbook is provided at the entrance of the passbook paper insertion slot 14, and a paper detection for detecting insertion of a slip is provided at the entrance of the paper insertion slot 16 for slips. A sensor S2 is provided.
[0027]
The print head 18 is disposed between the feed roller 4 and the feed roller 5 located on the downstream side in the paper transport direction, and moves in a direction crossing the paper feed direction, that is, a direction perpendicular to the paper surface in FIG. It has become. A drive source for moving the print head 18 is constituted by a stepping motor M2 shown in FIG. 2, and the print head 18 is a lead screw & nut type feed mechanism (not shown) or a timing belt & pulley type feed mechanism. It is driven by a stepping motor M2 through a power transmission system consisting of
However, there is a certain amount of backlash in the meshing state of the gear train arranged in the power transmission system, and in the screwing state between the lead screw and the nut.
[0028]
A reflective barcode read sensor S4 that reads a barcode printed on a sheet is provided so as to be integrally embedded in a protector 19 that covers the outer periphery of the tip of the print head 18, and together with the print head 18, FIG. Move in a direction perpendicular to the paper surface.
[0029]
FIG. 3 shows an example of a correspondence relationship between an example of the barcode 21 printed on the bankbook 20 and a signal output from the barcode read sensor S4 when the barcode 21 is read.
[0030]
The bar code lead sensor S4 is a reflective sensor including a light emitting unit and a light receiving unit. Since the surface of the bankbook 20 is black at the portion where the barcode 21 is printed, the brightness of the reflected light is low. Therefore, the level of the signal output from the barcode read sensor S4 is Lo. Further, since the surface of the bankbook 20 is bright between the bars of the barcode 21 or in the other part of the bankbook 20, the brightness of the reflected light is high, and the level of the signal output from the barcode read sensor S4 is Hi.
However, since the surface of the bankbook 20 is black at the printing position on the bankbook 20, the level of the output signal is Lo, and the barcode read sensor S4 does not detect the bankbook 20 at all, that is, the barcode read sensor. Even when the wall surface of the first paper transport path 13 is detected in S4, it is output from the barcode read sensor S4 due to the inclination of the optical path of the light beam output from the light emitting unit and the color relationship of the wall surface itself. The signal level is Lo.
[0031]
In FIG. 3, the direction of arrow a is the paper transport direction, and the direction of arrow b is the moving direction of the print head 18. The home position sensor S5 that detects the reference position of the print head 18 is disposed at the end of the first paper transport path 13 in the width direction, that is, at the stroke end of the print head 18.
[0032]
As shown in FIG. 1, the paper positioning sensor S3 for detecting the leading edge of the paper is installed at a position slightly upstream of the print head 18 in the paper transport direction.
[0033]
In FIG. 1, reference numeral 22 denotes a platen provided facing the print head 18, and reference numeral S <b> 6 denotes a magnetic head for reading data from a magnetic tape attached to the passbook 20.
[0034]
As shown in FIG. 2, the main part of the control system of the printer apparatus 1 includes a CPU 23 for overall drive control of the printer apparatus 1, a ROM 24 storing a drive control program for the CPU 23, and calculation data, The RAM 25 is used for temporary storage of print data and the like, and a non-volatile memory 26 that stores parameters and the like required for drive control of the printer 1.
[0035]
The nonvolatile memory 26 that stores parameters also functions as a sheet feed amount storage unit, a head movement amount storage unit, and a backlash correction value storage unit.
[0036]
The CPU 23 and its drive control program include a paper transport error detection test print control means, a paper feed direction actual print distance measurement means, a paper transport deviation detection means, a paper reference feed amount correction means, and a head movement error detection test print control. It functions as means for realizing the functions of the means, the head movement direction actual print distance measuring means, the head movement deviation detecting means, the head reference movement amount correcting means, the backlash detection test printing control means, and the backlash detection means.
[0037]
The interface 27 is used for data input / output between the printer apparatus 1 and a host computer (not shown).
[0038]
A stepping motor M1 that functions as a drive source for the paper feeding means 12, a stepping motor M2 that functions as a drive source for moving the print head 18, a rotary solenoid SOL that functions as a drive source for the path switching piece 17, and a print mechanism for the print head 18. Are driven and controlled by the CPU 23 via the respective drivers and the input / output circuit 28.
[0039]
Further, the signals from the paper detection sensor S1, the paper detection sensor S2, the paper positioning sensor S3, the bar code read sensor S4, the home position sensor S5, and the magnetic head S6 are transmitted to the respective A / D converters and the input / output circuit 28. Via the CPU 23.
[0040]
Next, referring to the flowcharts of FIGS. 4 to 9 showing the outline of the calibration process executed by the CPU 23 at the time of shipment of the printer apparatus 1 and the operation principle diagrams of FIGS. The adjustment, adjustment of the reference movement amount of the print head 18 and backlash correction will be specifically described.
[0041]
The CPU 23 that has started the calibration process first determines whether or not the paper detection sensor S1 or the paper detection sensor S2 is ON (steps A1 and A2). If any of the sensors is OFF, the process proceeds to step A1. , A2 is repeatedly executed, and the operator waits for insertion of a test sheet.
[0042]
Here, when the paper detection sensor S1 is turned on and the insertion of the paper is detected, it means that the test passbook has been inserted from the passbook paper insertion port 14, so the CPU 23 specifies the paper. A value 1 indicating insertion of a bankbook is set to the index i (step A3). In this case, since the rotary solenoid SOL is held in a non-excited state, the path switching piece 17 closes the second paper transport path 15 as shown in FIG. 1, and the first paper transport path 13 is used. It is selected as a paper transport path to be performed.
[0043]
On the other hand, when the paper detection sensor S2 is turned on and the insertion of the paper is detected, it means that a test slip has been inserted from the slip paper insertion slot 16, and the CPU 23 determines the paper identification index. A value 2 indicating insertion of a slip is set to i (step A4), and the rotary solenoid SOL is excited (step A5). In this case, the path switching piece 17 is swung clockwise in FIG. 1 by the excitation of the rotary solenoid SOL to close the first paper transport path 13, so that the second paper transport path 15 should be used. It will be selected as a transport path.
[0044]
When it is detected that the test paper has been inserted into the paper insertion slot 14 or the paper insertion slot 16 in this way, the CPU 23 starts a pulse output process for the stepping motor M1, and feeds the feed rollers 2-6. 1 is rotated counterclockwise in FIG. 1, and the sheet feeding means 12 starts conveying the sheet (step A6).
[0045]
Next, the CPU 23 determines whether or not the sheet positioning sensor S3 is ON, that is, whether or not the leading end of the sheet has reached the position of the sheet positioning sensor S3 (step A7). If the leading edge has not reached the position of the paper positioning sensor S3, the determination process of step A7 is repeatedly executed to wait for the leading edge of the paper to reach the position of the paper positioning sensor S3.
[0046]
When the leading edge of the paper reaches the position of the paper positioning sensor S3, the CPU 23 functioning as the paper conveyance error detection trial print control means detects this in the determination process of step A7, and resets the value of the counter C to zero. (Step A8).
[0047]
Next, the CPU 23 functioning as a paper transport error detection test print control unit increments the value of the counter C by 1 each time a pulse output to the stepping motor M1 is detected (steps A9 and A10), and the current value of the counter C is Then, it is determined whether or not the sheet reference feed amount Yi stored in the nonvolatile memory 26 as the sheet feed amount storage means has been reached (step A11).
[0048]
However, the sheet reference feed amount Yi is not a value in units of length, but the stepping motor M1 between the time when the sheet positioning sensor S3 detects the leading edge of the sheet and the time when the sheet reaches the ideal printing position. This is the theoretical value of the design of the pulse input to. However, in reality, there are individual differences in each part of the printer apparatus 1, so even if a pulse equivalent to the theoretical design value is input to the stepping motor M 1, there is no guarantee that the paper will reach the ideal print position. .
[0049]
The paper reference feed amount Yi is a value specified by the value of the paper specification index i, and the non-volatile memory 26 as the paper feed amount storage means stores the paper reference feed amount Y1 to be applied to the passbook and the slip. The reference sheet feed amount Y2 to be applied is stored. That is, the paper feed amount storage means of this embodiment is a paper feed amount storage means that stores the reference feed amount for each paper type. In the determination process of step A11, either the reference feed amount Y1 (i = 1) or the reference feed amount Y2 (i = 2) is selectively read based on the current value of the paper identification index i.
[0050]
When the current value of the counter C reaches the paper reference feed amount Yi, the CPU 23 functioning as a paper transport error detection test print control means detects this in the determination process of step A11, and outputs a pulse to the stepping motor M1. The processing is temporarily stopped, the rotation of the feed rollers 2 to 6 is temporarily stopped, and the conveyance of the sheet by the sheet feeding unit 12 is stopped (step A12).
[0051]
Next, the CPU 23 functioning as a test print control means for detecting the paper transport error drives the printing mechanism of the print head 18 and the stepping motor M2 that moves the print head 18 to detect the paper transport error on the test paper. A horizontal ruled line for printing is printed (step A13). That is, the paper conveyance error detection trial print control means of this embodiment is a paper conveyance error detection trial print control means for printing a horizontal ruled line in a printing operation for paper conveyance error detection.
[0052]
The state when the horizontal ruled line Y is printed on the test paper 20 ′ is shown in the operation principle diagram of FIG. As described above, since each part of the printer apparatus 1 has individual differences, even if a pulse number Yi that is equal to the theoretical design value is input to the stepping motor M1, the sheet reaches the ideal print position. There is no guarantee, and in this example, the feed to the test paper 20 'seems to be insufficient, and the horizontal ruled line Y is printed at a position closer to the tip of the paper 20' than the ideal horizontal ruled line print position Y '. I'm stuck.
[0053]
Next, the CPU 23 starts a pulse output process for the stepping motor M1, and rotates the feed rollers 2 to 6 in the clockwise direction in FIG. 1 to start reverse conveyance of the sheet by the sheet feeding unit 12 (step A14).
[0054]
Then, the CPU 23 determines whether or not the signal from the barcode read sensor S4 is Lo, that is, whether or not the leading end of the sheet 20 ′ is returned to the front side of the barcode read sensor S4 (step). A15) Wait until the leading edge of the paper 20 ′ returns to the front side of the barcode lead sensor S4.
[0055]
Next, when the signal from the barcode read sensor S4 turns to Lo and the determination processing in step A15 confirms that the leading edge of the sheet 20 ′ has been returned to the front side of the barcode read sensor S4, the CPU 23 again Then, the feed rollers 2 to 6 are rotated counterclockwise in FIG. 1 to start the conveyance of the sheet by the sheet feeding means 12 (step A16).
[0056]
Then, the CPU 23 determines whether or not the signal from the barcode read sensor S4 is Hi, that is, whether or not the leading end of the sheet 20 ′ has been returned to the position of the barcode read sensor S4 (step A17). The apparatus waits until the leading end of the sheet 20 ′ is detected by the bar code read sensor S4.
[0057]
Next, when the signal from the bar code read sensor S4 changes from Lo to Hi and it is confirmed by the determination processing in step A17 that the leading end of the paper 20 'is detected again by the bar code read sensor S4, the actual paper feed direction printing is performed. The CPU 23 functioning as the distance measuring means resets the value of the counter C to zero (step A18).
[0058]
Then, the CPU 23 functioning as the paper feed direction actual print distance measuring means increments the value of the counter C by 1 each time a pulse output to the stepping motor M1 is detected (steps A19 and A20), and a signal from the barcode read sensor S4. Is turned from Hi to Lo, that is, whether or not the horizontal ruled line Y printed on the paper 20 'has reached the position of the bar code read sensor S4 (step A21). Until the position reaches the position of the barcode read sensor S4, the processes of steps A19 to A21 are repeatedly executed and waited.
[0059]
While such processing is repeatedly executed, in the determination processing of step A21, when it is confirmed that the signal from the barcode read sensor S4 has changed from Hi to Lo, the CPU 23 generates a pulse for the stepping motor M1. The output process is stopped, the rotation of the feed rollers 2 to 6 is temporarily stopped, and the conveyance of the sheet by the sheet feeding means 12 is stopped (step A22).
[0060]
At this time, the value of the number of pulses stored in the counter C is a value of the number of pulses corresponding to the separation distance from the leading end of the sheet 20 ′ to the printing position of the horizontal ruled line Y for detecting the sheet conveyance error.
[0061]
That is, in this embodiment, by the processing of the CPU 23 functioning as the paper feed direction actual print distance measuring means, the front end of the paper 20 ′ is temporarily returned to the front of the bar code read sensor S4, and is fed again to the paper 20 ′. At the same time that the lead sensor S4 detects the leading edge of the sheet 20 ′, the value of the counter C is reset, and the number of pulses output to the stepping motor M1 corresponding to the driving amount of the sheet feeding means 12 is counted by the counter C. When the sensor S4 detects the horizontal ruled line Y, the counting by the counter C is stopped to obtain the separation distance from the leading end of the paper 20 ′ to the printing position of the horizontal ruled line Y for detecting the paper conveyance error. At this time, the bar code read sensor S4 detects the presence or absence of the horizontal ruled line Y in the normal direction of the horizontal ruled line Y for detecting the paper conveyance error, that is, in the form of relative movement along the paper conveyance direction. The horizontal ruled line Y can be recognized with the same high detection accuracy as when reading a barcode. The separation distance from the leading edge of the sheet 20 ′ thus obtained to the horizontal ruled line Y is shown as C in FIG.
[0062]
Next, the CPU 23 functioning as a paper conveyance deviation detecting means determines the ideal number of pulses (stored in the nonvolatile memory 26) corresponding to a predetermined ideal separation distance from the leading edge of the paper 20 ′ to the horizontal ruled line Y ′. A deviation from the separation distance C is obtained, and this value is stored as a correction value ΔYi (step A23). This correction value is shown as ΔYi in FIG.
[0063]
Further, the CPU 23 functioning as the paper reference feed amount correction means reads the paper reference feed amount Yi stored in the nonvolatile memory 26 as the paper feed amount storage means, and adds a correction value ΔYi to this value to obtain an appropriate value. The sheet reference feed amount Yi is obtained, and the corrected value of the sheet reference feed amount Yi is overwritten in the non-volatile memory 26 as the sheet feed amount storage means (step A24).
[0064]
As a result of rewriting the value of the reference feed amount Yi of the sheet in this way, the correction value is set to the reference feed amount Yi (value before correction) shown in FIG. 10 during normal use after the apparatus is shipped. Since the stepping motor M1 is driven and controlled based on the reference feed amount Yi (value after correction) obtained by adding ΔYi, the print position deviation ΔYi shown in FIG. 10 is eliminated, which is ideal. Therefore, it is possible to perform appropriate printing at the position of the correct printing position Y ′.
[0065]
Of course, it is not always necessary to rewrite the value of the reference feed amount Yi of the sheet, and the reference feed amount Yi (value before correction) is held as it is in the nonvolatile memory 26 as the sheet feed amount storage means, and the correction value ΔYi The value may be separately stored in the non-volatile memory 26, and the same process as step A24 may be executed each time as a pre-process for the printing operation at the time of normal use after shipment of the apparatus. If calibration needs to be performed relatively frequently due to structural problems of the printer apparatus 1 or the like, it may be convenient to save the initial value of the sheet reference feed amount Yi.
[0066]
Next, the CPU 23 executes a pulse output process for the stepping motor M2, moves the print head 18 in a direction orthogonal to the paper transport direction, and once positions the print head 18 at the home position sensor S5 (step A25).
[0067]
When it is confirmed by the home position sensor S5 that the positioning of the print head 18 has been completed, the CPU 23 functioning as a test print control means for detecting head movement error resets the value of the counter C to zero (step A26). Pulse output processing for the motor M2 is started, and feeding of the print head 18 in the direction away from the home position sensor S5, that is, the direction toward the inside of the sheet 20 ′ is started (step A27).
[0068]
The CPU 23 functioning as the head movement error detection test print control means increments the value of the counter C by 1 each time a pulse output to the stepping motor M2 is detected (steps A28 and A29), and the current value of the counter C is Then, it is determined whether or not the print head reference movement amount Xi stored in the nonvolatile memory 26 as the head movement amount storage means has been reached (step A30).
[0069]
As described above, the reference movement amount Xi of the print head is not a value in units of length, but the print head 18 reaches the ideal print position after the home position sensor S5 detects the return of the home position of the print head 18. This is the theoretical value of the design of the pulse input to the stepping motor M2 until this time. However, in practice, there are individual differences in each part of the printer apparatus 1, so that even if a pulse equivalent to the theoretical design value is input to the stepping motor M 2, it is guaranteed that the print head 18 reaches the ideal print position. There is no.
[0070]
The reference movement amount Xi of the print head is a value specified by the value of the sheet specifying index i, and the reference movement amount X1 of the print head to be applied to the passbook is stored in the nonvolatile memory 26 as the head movement amount storage means. And the reference movement amount X2 of the print head to be applied to the slip is stored. In the determination process in step A30, either the reference movement amount X1 (i = 1) or the reference movement amount X2 (i = 2) is selectively read based on the current value of the paper identification index i.
[0071]
When the current value of the counter C reaches the reference movement amount Xi of the print head, the CPU 23 functioning as the head movement error detection test print control means detects this in the determination process of step A30, and the pulse to the stepping motor M2 is detected. The output process is temporarily stopped, and the movement of the print head 18 is temporarily stopped (step A31).
[0072]
Next, the CPU 23 functioning as a test print control means for detecting head movement error drives the printing mechanism of the print head 18 and the stepping motor M1 that drives the paper feed means 12 so that the print head movement error is applied to the test paper. A vertical ruled line for detection is printed (step A32). That is, the head movement error detection test print control means of this embodiment is a head movement error detection test print control means for printing vertical ruled lines in a printing operation for detection of head movement error.
[0073]
The state when the vertical ruled lines X are printed on the test paper 20 ′ is shown in the operational principle diagram of FIG. As described above, since there are individual differences in each part of the printer apparatus 1, even if the number of pulses Xi that is equal to the theoretical design value is input to the stepping motor M2, the print head 18 reaches the ideal print position. In this example, the feed to the print head 18 with respect to the home position is excessive, and in this example, the position from one side edge of the paper 20 ′ is more than the ideal vertical ruled line print position X ′. A vertical ruled line X has been printed on the screen.
[0074]
Next, the CPU 23 starts a pulse output process for the stepping motor M2, and starts feeding the print head 18 in a direction to move the barcode read sensor S4 from one end of the paper 20 ′ to the outside (step). A33).
[0075]
Then, the CPU 23 determines whether or not the signal from the barcode read sensor S4 is Lo, that is, the barcode read sensor S4 provided in the protector 19 of the print head 18 is outside the one end of the sheet 20 ′. (Step A34), and waits until the barcode read sensor S4 is sent to the outside of one end of the sheet 20 ′.
[0076]
Next, when the signal from the barcode read sensor S4 turns to Lo and it is confirmed in the determination process in step A34 that the barcode read sensor S4 has been sent outside the one side edge of the sheet 20 ′, the CPU 23 Again, the print head 18 is fed in the direction approaching the home position sensor S5 (step A35).
[0077]
Then, the CPU 23 determines whether or not the signal from the barcode read sensor S4 is Hi, that is, whether or not the barcode read sensor S4 has reached one side edge of the sheet 20 ′ from the outside area of the sheet 20 ′. (Step A36), and a pulse is output to the stepping motor M2 until the barcode read sensor S4 reaches one end of the sheet 20 ′.
[0078]
Next, when the signal from the bar code read sensor S4 turns from Lo to Hi and the bar code read sensor S4 has reached the one side edge of the paper 20 'from the outside in the determination process in step A36, the head movement is performed. The CPU 23 functioning as the actual direction printing distance measuring means resets the value of the counter C to zero (step A37).
[0079]
Then, the CPU 23 functioning as the head moving direction actual print distance measuring means increments the value of the counter C by 1 every time a pulse output to the stepping motor M2 is detected (steps A38 and A39), and the bar code read sensor S4 It is determined whether or not the signal has changed from Hi to Lo, that is, whether or not the barcode read sensor S4 has reached the position of the vertical ruled line X printed on the paper 20 ′ (step A40). Until the lead sensor S4 reaches the position of the vertical ruled line X, the processing of steps A38 to A40 is repeatedly executed and waits.
[0080]
While such processing is repeatedly executed, in the determination processing in step A40, when it is confirmed that the signal from the barcode read sensor S4 has changed from Hi to Lo, the CPU 23 generates a pulse for the stepping motor M2. The output process is temporarily stopped, and the feed to the print head 18, that is, the barcode read sensor S4 is stopped (step A41).
[0081]
At this time, the value of the number of pulses stored in the counter C is a value of the number of pulses corresponding to the separation distance from one side edge of the sheet 20 ′ to the printing position of the vertical ruled line X for detecting head movement error. is there.
[0082]
That is, in this embodiment, the barcode read sensor S4 is once moved outside the one side edge of the paper 20 ′ by the processing of the CPU 23 functioning as the head moving direction actual print distance measuring means, and is sent again to the print head 18. To allow the bar code read sensor S4 to detect one side edge of the sheet 20 'and simultaneously reset the value of the counter C to determine the number of pulses output to the stepping motor M2 corresponding to the amount of movement of the bar code read sensor S4. Counting is performed by the counter C, and when the bar code read sensor S4 detects the vertical ruled line X, the counting by the counter C is stopped, so that the vertical ruled line X for detecting head movement error is detected from one side edge of the sheet 20 ′. The separation distance to the printing position is obtained. At this time, the barcode read sensor S4 detects the presence or absence of the vertical ruled line X in a manner of relative movement along the normal direction of the vertical ruled line X for detecting head movement error, that is, along the feed direction of the print head 18. Therefore, it is possible to recognize the vertical ruled line X with the same high detection accuracy as when reading a normal barcode. Further, since the bar code read sensor S4 is integrally attached to the protector 19 of the print head 18, no special equipment for moving the bar code read sensor S4 is necessary, and if the print head 18 is fed. The bar code lead sensor S4 can be moved. The separation distance from the one side edge of the paper 20 ′ thus obtained to the printing position of the vertical ruled line X for detecting head movement error is shown as C in FIG.
[0083]
Next, the CPU 23 functioning as the head movement deviation detecting means stores an ideal number of pulses (stored in the nonvolatile memory 26) corresponding to an ideal separation distance from one end of the sheet 20 ′ to the vertical ruled line X ′. ) And the separation distance C, and this value is stored as a correction value ΔXi (step A42). This correction value is shown as ΔXi in FIG.
[0084]
The CPU 23 functioning as the head reference movement amount correction means reads the reference movement amount Xi of the print head stored in the nonvolatile memory 26 as the head movement amount storage means, and subtracts the correction value ΔXi from this value. An appropriate reference movement amount Xi of the print head is obtained, and the corrected reference movement amount Xi of the print head is overwritten in the nonvolatile memory 26 as the head movement amount storage means to be updated and stored (step A43).
[0085]
As a result of rewriting the value of the reference movement amount Xi of the print head in this way, the correction value is calculated from the reference movement amount Xi (value before correction) shown in FIG. Since the stepping motor M2 is driven and controlled based on the reference movement amount Xi (value after correction) obtained by subtracting ΔXi, the deviation ΔXi of the print position in the print head movement direction shown in FIG. Thus, it is possible to perform appropriate printing at the position of the typical printing position X ′.
[0086]
As described above, it is not always necessary to rewrite the value itself of the reference movement amount Xi of the print head, and the reference movement amount Xi (value before correction) is held as it is in the nonvolatile memory 26 as the head movement amount storage means. The value of the correction value ΔXi may be separately stored in the non-volatile memory 26, and the same process as step A43 may be executed each time as a pre-process of the printing operation at the time of normal use after shipment of the apparatus. .
[0087]
Next, the CPU 23 moves the print head 18 to one end of the paper 20 ′, for example, the home position sensor S5 side, and stops it (step A44).
[0088]
Then, the CPU 23 functioning as the backlash detection test print control means drives the stepping motor M2, and again feeds the print head 18 in the direction away from the home position sensor S5, thereby determining the print head 18 in advance. Positioning at an arbitrary target position, for example, the center of the sheet 20 ′ (steps A45 and A46), the printing mechanism of the print head 18 and the stepping motor M1 for driving the sheet feeding means 12 are driven to test the sheet. In 20 ′, the first vertical ruled line for backlash detection is printed (step A47).
[0089]
Backlash of the power transmission system that drives the print head 18 from when the print head 18 moves from the stroke end on the home position sensor S5 side to the center of the paper 20 ', that is, from the stepping motor M2 to the print head 18. The backlash of the power transmission system is eliminated, and the first printing operation is performed on the test paper 20 ′ in this state.
[0090]
Next, the CPU 23 functioning as a test print control unit for backlash detection moves the print head 18 to the other end of the sheet 20 ', that is, the stroke end opposite to the home position sensor S5 (step A48), and then the stepping motor. M2 is driven, and the print head 18 is again fed in the direction approaching the home position sensor S5, and the print head 18 is positioned at the same target position as described above, for example, at the center of the sheet 20 ′ (step A49, A50), the printing mechanism of the print head 18 and the stepping motor M1 that drives the paper feeding means 12 are driven, and the second vertical ruled line for backlash detection is printed on the test paper 20 ′. (Step A51).
[0091]
When the direction of movement is reversed after the print head 18 is moved to the other side edge of the sheet 20 ′, the backlash of the power transmission system becomes surface due to the reversal of the rotation direction of the stepping motor M2. Accordingly, even if the rotation direction of the stepping motor M2 is reversed, the print head 18 does not start moving immediately, and only the stepping motor M2 and a part of the power transmission system are driven while the movement of the print head 18 is stopped. Occurs instantaneously. When the backlash is eliminated by the idling of the stepping motor M2 and the power transmission system, the reverse movement of the print head 18, that is, the movement toward the print target position is started again.
[0092]
Accordingly, even when a movement command for moving to the same target position, that is, a pulse, is output to the stepping motor M2, the print head 18 is moved from the one side end of the paper 20 ′ toward the target position and the paper 20 When the print head 18 is moved from the other side end toward the target position, there is a slight difference in the stop position of the print head 18. For this reason, the vertical ruled lines printed in the first printing operation are printed at positions relatively close to one side edge of the paper 20 ′, and the vertical ruled lines printed in the second printing operation are relatively Thus, printing is performed at a position close to the other end of the sheet 20 ′. This positional shift is a positional shift corresponding to a backlash of the power transmission system from the stepping motor M2 to the print head 18.
[0093]
Therefore, if the number of pulses input to the stepping motor M2 required to move the print head 18 by the positional deviation corresponding to the backlash is obtained and this number of pulses is used as a correction value, the print head It is possible to eliminate the positional deviation caused by the difference of the 18 movement directions.
[0094]
Therefore, the CPU 23 first retracts the print head 18 to the home position sensor S5 side and moves the barcode read sensor S4 outward from one end of the sheet 20 ′ (step A52), and then again with respect to the stepping motor M2. A pulse output process is started and the print head 18 is fed away from the home position sensor S5 (step A53). Whether the signal from the barcode read sensor S4 is Hi, that is, the barcode It is determined whether or not the lead sensor S4 has reached one side edge of the paper 20 ′ from the outside (step A54), and a pulse is applied to the stepping motor M2 until the bar code lead sensor S4 reaches one side edge of the paper 20 ′. Output.
[0095]
Next, when the signal from the bar code read sensor S4 changes from Lo to Hi and the bar code read sensor S4 has reached the one end of the paper 20 ′ from the outside in the determination process of step A54, the CPU 23 Then, it is determined whether or not the signal from the bar code read sensor S4 is Lo, that is, whether or not the bar code read sensor S4 has detected the vertical ruled line printed in the first printing operation (step). A55) A pulse is output to the stepping motor M2 until the bar code read sensor S4 detects the vertical ruled line printed in the first printing operation.
[0096]
Then, the signal from the bar code read sensor S4 changes from Hi to Lo, and it is confirmed by the determination process in step A55 that the bar code read sensor S4 has detected the vertical ruled line printed by the first printing operation. Then, the CPU 23 functioning as a backlash detection means resets the value of the counter C to zero (step A56).
[0097]
The CPU 23 functioning as the backlash detection means increments the value of the counter C by 1 each time the pulse output to the stepping motor M2 is detected (steps A57 and A58), and the signal from the barcode read sensor S4 becomes Lo. It is determined whether or not it has turned to Hi, that is, whether or not the state in which the bar code read sensor S4 has detected the vertical ruled line printed in the first printing operation has been completed (step A59). This is because the vertical ruled line has a certain width.
[0098]
If the bar code read sensor S4 is detecting the vertical ruled line printed in the first printing operation, the bar code read sensor S4 does not detect the vertical ruled line printed in the first printing operation. The processing of steps A57 to A59 is repeatedly executed, and the pulse counting by the counter C is continued during this time.
[0099]
Next, when it is confirmed in step A59 that the bar code read sensor S4 has moved beyond the vertical ruled line printed in the first printing operation, the CPU 23 functioning as the backlash detection means detects the stepping motor. Each time a pulse output to M2 is detected, the value of the counter C is incremented by 1 (steps A60 and A61), and whether or not the signal from the barcode read sensor S4 has changed from Hi to Lo, that is, the barcode read sensor S4. Determines whether or not the vertical ruled line printed in the second printing operation has been detected (step A62).
[0100]
While the determination result in step A62 is false, the barcode read sensor S4 moves between the vertical ruled line printed in the first printing operation and the vertical ruled line printed in the second printing operation. Means that
[0101]
When the bar code read sensor S4 detects that the vertical ruled line printed in the second printing operation is detected in the determination process in step A62, the CPU 23 functioning as the backlash detection means detects the current value of the counter C. Value, that is, the second printing operation after the bar code read sensor S4 detects the end of the vertical ruled line printed in the first printing operation (for example, the end near the home position sensor S5). The backlash correction value storage means stores the value C of the number of pulses input to the stepping motor M2 until the end in the width direction of the vertical ruled line printed in step S1 (the end close to the home position sensor S5) is detected. Is stored in the backlash correction value storage register ΔL in the non-volatile memory 26 (step A63).
[0102]
The counter C detects the end in the width direction of the vertical ruled line printed in the first printing operation until it detects the end in the width direction of the vertical ruled line printed in the second printing operation. Since the number of pulses is counted in between, the center of the vertical ruled line printed by the first printing operation and the vertical ruled line printed by the second printing operation even when the width of the vertical ruled line is thick It is possible to accurately measure the distance from the center of the.
[0103]
In this embodiment, when the print head 18 is sent in a direction away from the home position sensor S5 and positioned, the value of the reference movement amount Xi of the print head is calibrated so that the print head 18 reaches the commanded position. Therefore, when the print head 18 is sent away from the home position sensor S5, backlash correction is not necessary.
[0104]
Further, when the print head 18 is sent in the direction of approaching the home position sensor S5 during normal use after the device is shipped, the backlash correction value stored in the backlash correction value storage register ΔL is set to the number of pulses corresponding to the movement command. By adding and outputting, the backlash when the feeding direction is reversed can be appropriately eliminated. However, the backlash correction value is added only when the print head 18 is moved in the direction of moving away from the home position sensor S5 and then moved again in the direction of approaching the home position sensor S5. When the print head 18 is moved in the direction to approach the home position sensor S5 and temporarily stopped after the print head 18 is moved in the direction to approach the home position sensor S5 again, the backlash correction value addition process is not performed. Execute.
[0105]
In this way, after the parameter correction processing regarding various positional deviations is completed, the CPU 23 returns the print head 18 to the home position (step A64), and reversely drives the paper feeding means 12 to insert the paper 20 '. After discharging from the port 14 or the paper insertion port 16 (step A65), if the rotary solenoid SOL is activated, the excitation is released and the path switching piece 17 is returned to the initial position (step A66), and all calibrations are performed. The process ends.
[0106]
【The invention's effect】
The printer apparatus according to the present invention obtains a separation distance from the front end of the paper to the actual print position for detecting a paper transport error by using the paper feeding means and the bar code lead sensor, and the separation distance is determined from the predetermined front end of the paper. Since the reference feed amount of the paper feed amount storage means is corrected based on the deviation from the ideal separation distance to the printing position, a passbook printer device or a slip printer device without an image sensor, etc. In this case, the correction of the deviation of the printing position in the paper conveyance direction can be easily performed by automatic processing.
[0107]
Also, while moving the barcode read sensor, the amount of movement of the barcode read sensor and the signal from the barcode read sensor are monitored, and from one side edge of the paper to the actual print position for detecting the print head movement error. Since the separation distance is obtained and the reference movement amount of the head movement amount storage means is corrected based on the deviation between this separation distance and a predetermined ideal separation distance from one side edge of the paper to the printing position. Even in a passbook printer device or a slip printer device that does not include an image sensor, correction of a print position shift in the print head moving direction can be easily performed by automatic processing.
[0108]
Further, after the print head is moved from one side edge of the sheet toward the pre-stored target position to perform the first printing operation, the other side edge of the paper is directed toward the pre-stored target position. The printing head is moved to perform the second printing operation, and the distance between the first printing position and the second printing is determined by the amount of movement of the barcode read sensor and the signal from the barcode read sensor. Since this separation distance is stored as a backlash correction value, the power transmission system for moving the print head is also used in a passbook printer device or a slip printer device without an image sensor. Correction of the print position deviation in the print head movement direction due to backlash can be easily performed by automatic processing.
[0109]
In addition, since the barcode read sensor is arranged on a protector attached to the print head and moved together with the print head, a drive means dedicated to the barcode read sensor is unnecessary, and the manufacturing cost and failure factor of the printer device are not required. It helps to reduce
[0110]
In addition, the horizontal ruled lines are printed during the printing operation for detecting the paper transport error, while the vertical ruled lines are printed during the printing operation for detecting the print head movement error. The print position can be detected while the bar code lead sensor is relatively moved in the direction of contact and separation along the direction, and the correction process can be performed by measuring the shift of the print position with high detection accuracy.
[0111]
Furthermore, since the reference feed amount for each paper type is stored for each paper type, it is possible to feed the paper appropriately according to the difference in the friction of the paper, the thickness, etc., and the print position in the paper feed direction. Misalignment can be eliminated accurately.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an outline of a mechanical configuration of a printer apparatus according to an embodiment to which the invention is applied.
FIG. 2 is a functional block diagram schematically illustrating a main part of a control system of the printer apparatus according to the embodiment.
FIG. 3 is a conceptual diagram showing an example of a signal output from a bar code read sensor.
FIG. 4 is a flowchart illustrating an outline of calibration processing executed by a CPU provided in the printer apparatus of the embodiment.
FIG. 5 is a continuation of the flowchart showing an outline of the calibration process.
FIG. 6 is a continuation of the flowchart showing an outline of the calibration process.
FIG. 7 is a continuation of the flowchart showing an outline of the calibration process.
FIG. 8 is a continuation of the flowchart showing an outline of the calibration process.
FIG. 9 is a continuation of the flowchart showing an outline of the calibration process.
FIG. 10 is an operation principle diagram illustrating adjustment of a reference feed amount of a sheet.
FIG. 11 is an operation principle diagram illustrating adjustment of the reference movement amount of the print head.
[Explanation of symbols]
1 Printer device
2,3,4,5,6 Feed roller
7, 8, 9, 10, 11 Pinch roller
12 Paper feeding means
13 First paper transport path
14 Passbook paper insertion slot
15 Second paper transport path
16 Paper slot for slips
17 Route switching piece
18 Print head
19 Protector
20 Passbook (paper)
20 'test paper
21 Barcode
22 Platen
23 CPU (paper transport error detection trial print control means, paper feed direction actual print distance measurement means, paper transport deviation detection means, paper reference feed amount correction means, head movement error detection test print control means, head movement direction actual print distance Measurement means, head movement deviation detection means, head reference movement amount correction means, backlash detection test print control means, backlash detection means)
24 ROM
25 RAM
26 Non-volatile memory (paper feed amount storage means, head movement amount storage means, backlash correction value storage means)
27 Interface
28 I / O circuit
M1 stepping motor
M2 stepping motor
SOL rotary solenoid
S1 Paper detection sensor
S2 Paper detection sensor
S3 Paper positioning sensor
S4 Reflective bar code lead sensor
S5 Home position sensor
S6 Magnetic head

Claims (6)

In a printer apparatus comprising a sheet feeding means that feeds a sheet, a print head that moves in a direction crossing the sheet feeding direction, and a reflective barcode read sensor that reads a barcode printed on the sheet,
A paper positioning sensor for detecting the leading edge of the paper;
A sheet feed amount storage means for storing a reference sheet feed amount;
Paper that detects the operation of the paper positioning sensor, drives the paper feed means by a reference feed amount stored in the paper feed amount storage means, and then causes the print head to perform a printing operation for detecting a paper transport error. Test printing control means for detecting conveyance errors;
After operation of the paper transport error detecting test print control means, wherein said paper feed means is driven back to the leading end of the sheet in front of the said bar code read sensor, while driving the paper feed means again to the sheet conveying direction A signal from the bar code read sensor is monitored to detect the leading edge of the paper, and a subsequent drive amount of the paper feeding means and a signal from the bar code lead sensor are monitored to detect a paper transport error from the front edge of the paper. A paper feed direction actual print distance measuring means for obtaining a separation distance to the print position of
A paper conveyance deviation detecting means for calculating a deviation between the separation distance obtained by the paper feed direction actual printing distance measuring means and a predetermined ideal separation distance from the front end of the paper to the printing position;
A printer apparatus comprising: a paper reference feed amount correcting means for correcting the reference feed amount of the paper feed amount storage means based on the deviation calculated by the paper transport deviation detecting means. A home position sensor for detecting a reference position of the print head;
Head movement amount storage means for storing a reference movement amount of the print head;
The operation of the home position sensor is detected, the print head is moved by a reference movement amount stored in the head movement amount storage means, and then the print head is caused to perform a printing operation for detecting a print head movement error. Test print control means for detecting head movement error;
After the test print control means for detecting head movement error is actuated, the bar code lead sensor is moved to move the bar code lead sensor to the outside of one side edge of the paper, and the bar code lead sensor is changed to the home again. A signal from the bar code lead sensor is monitored while moving toward the position sensor to detect one side edge of the paper, and a subsequent movement amount of the bar code lead sensor and a signal from the bar code lead sensor A head movement direction actual print distance measuring means for obtaining a separation distance from one side edge of the paper to a print position for print head movement error detection;
A head movement deviation detecting means for calculating a deviation between the separation distance obtained by the head movement direction actual printing distance measuring means and a predetermined ideal separation distance from the one side end to the printing position;
2. The printer apparatus according to claim 1, further comprising head reference movement amount correction means for correcting the reference movement amount of the head movement amount storage means based on the deviation calculated by the head movement deviation detection means. After the print head is moved from one side edge of the paper toward a pre-stored target position to cause the print head to perform a first printing operation for backlash detection, the paper feeding means is stopped. For backlash detection, the print head is moved from the other side edge of the sheet toward the previously stored target position while holding the print head, and the print head performs a second printing operation for backlash detection. Trial printing control means;
After the operation of the backlash detection test printing control means, while moving the barcode lead sensor while maintaining the stop state of the paper feeding means, the amount of movement of the barcode lead sensor and the signal from the barcode lead sensor, A backlash detection means for obtaining a separation distance between the first printing position for backlash detection and the second printing for backlash detection;
3. The printer apparatus according to claim 2, further comprising backlash correction value storage means for storing the separation distance obtained by the backlash detection means as a backlash correction value.   4. The printer apparatus according to claim 1, wherein the bar code lead sensor is disposed in a protector attached to the print head. 5. The paper transport error detection test print control means prints a horizontal ruled line during a print operation for paper transport error detection, and the head movement error detection test print control means performs a print operation for print head movement error detection. 4. The printer apparatus according to claim 2 , wherein the printer is configured to print vertical ruled lines.   The paper feeding means is provided with a plurality of paper insertion openings corresponding to the type of paper, and the paper feeding amount storage means is configured to store a reference feeding amount for each paper type. The printer device according to claim 1, claim 2, claim 3, claim 4 or claim 5.

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