JPH07164718A - Printing position controller - Google Patents

Abstract

PURPOSE:To eliminate the possibility that a shift of a printing paper set position may cause a printed result to be shifted or lie out of paper by providing a control part for controlling a printing start position and the number of printing characters by receiving a signal from a reference position operating circuit or the like. CONSTITUTION:An output signal from a reference detection sensor 3 is inputted to a reference detection circuit 15. The reference detection circuit 15 detects thereby a left end position when printing paper is normally set, i.e., a reference position, and transmits it to a reference position operating circuit 16. The reference position operating circuit 16 receives output signals from the reference detection circuit 15 and an encoder 5, calculates the reference position, and transmits the result to a control part 17. The control part 17 calculates a difference between the reference position from the reference position operating circuit 15 and a left end position from a left end position operating circuit 12 to find a printing paper set position. A printing position for the first character is corrected by using the position as a reference. In this manner, a shift in printing caused by a shift of a printing paper set position can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print position control device used in a printing device, and more particularly, to a print start position and a print number depending on a mounting position of a printing paper mounted on the printing device and a width of the printing paper. The present invention relates to a print position control device for performing control.

[0002]

2. Description of the Related Art In a conventional printing device, print data sent from a host device is used to determine a predetermined print start position and print number regardless of the mounting position of the mounted print paper and the width of the print paper. Is printed in.

[0003]

As described above, in the conventional printing apparatus, since the mounting position of the mounted printing paper and the width of the printing paper are not controlled, the mounting position of the printing paper is changed horizontally. If it is misaligned in the direction, the characters printed on the printing paper will be misaligned from the predetermined position, and if the width of the printing paper is narrow, it will be printed out of the printing paper. There is a drawback that it will be revealed afterwards.

[0004]

A print position control device of the present invention comprises a paper detection sensor for detecting a mounting position of a print paper mounted on the printing device, and a left end of the print paper according to a signal from the paper detection sensor. A left end detection circuit for detecting a position, a right end detection circuit for detecting a right end position of the printing paper by a signal from the paper detection sensor, a reference detection sensor for sending a signal related to a reference position of the printing paper, and the reference detection sensor A reference detection circuit that detects the reference position by a signal from the encoder, an encoder that detects the amount of movement of the paper pressing unit, a signal from the left end detection circuit, and a signal from the encoder are input to calculate the left end position of printing. Right edge position calculation circuit and right edge position for calculating the right edge position of printing by inputting the signal from the right edge detection circuit and the signal from the encoder An arithmetic circuit, a reference position arithmetic circuit that inputs a signal from the reference detection circuit and a signal from the encoder to calculate the reference position of the print sheet, the left end position arithmetic circuit, the right end position arithmetic circuit, and the reference position. And a control unit for controlling a print start position and the number of prints by inputting a signal from the arithmetic circuit.

[0005]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a perspective view showing a main part of an example of a printing apparatus to which the embodiment of FIG. 1 is applied.

In FIG. 2, when the printing paper is loaded,
The motor 4 operates and the paper restraining unit 2 returns to the reference position once via the timing belt 6. As a result, the reference detection sensor 3 detects the shield plate 7, the paper holding unit 2 moves until the paper detection sensor 1 detects the left end and the right end of the printing paper, and the paper holding unit 2 stops at the time of detection. As a result, the sheet detection sensor 1 detects the left edge and the right edge of the print sheet. At this time, the encoder 5 detects the amount of movement of the paper pressing unit 2.

The output signal from the paper detection sensor 1 is shown in FIG.
As shown in, the left end detection circuit 11 and the right end detection circuit 1
3 into the left end detection circuit 11 and the right end detection circuit 13
When the output signal from the paper detection sensor 1 is cut off, the left end and the right end of the printing paper detected by the paper detection sensor 1 are detected as the left end position calculation circuit 12 and the right end position calculation circuit 1, respectively.
Output to 4. On the other hand, the output signal from the encoder 5 is also
It is input to the left end position calculation circuit 12 and the right end position calculation circuit 14.

The left end position calculation circuit 12 is a left end detection circuit 1.
1 and the output signal from the encoder 5 are input to calculate the left end position of the printing paper, and the result is output to the control unit 17. Similarly, the right end position calculation circuit 14 is
3 outputs the output signals from the encoder 5 and the encoder 5, calculates the right end position of the print sheet, and outputs the result to the control unit 17.

The output signal from the reference detection sensor 3 is input to the reference detection circuit 15, which detects the left end position when the print paper is correctly mounted, that is, the reference position and detects the reference position. Output to the arithmetic circuit 16. The reference position calculation circuit 16 inputs the output signals from the reference detection circuit 15 and the encoder 5, calculates the reference position, and outputs the result to the control unit 17.

The control unit 17 calculates the difference between the reference position from the reference position calculation circuit 14 and the left end position from the left end position calculation circuit 12 to obtain the mounting position of the printing paper, and the first position is based on this position. Correct the print position of the character. As a result, it is possible to eliminate the printing deviation due to the deviation of the mounting position of the printing paper.

The control unit 17 also includes a left end position calculation circuit 12
From the right end position from the right end position calculation circuit 14 is calculated to obtain the width of the print paper, and the number of prints of one line for the attached print paper is obtained. As a result, when print data that exceeds the number of characters that can be printed on one line is sent from a higher-level device, the excess characters are printed on the next line, or the upper line indicates that printing cannot be performed on one line. By notifying the device, the printing outside the printing paper is prevented. Whether to print on the next line or to notify the higher-level device is determined based on the control data sent from the higher-level device.

[0013]

As described above, the printing position control device of the present invention detects the left end position and the right end position of the mounted printing paper and detects the mounting position of the printing paper from the difference between the left end position and the reference position. The print position of the first character is corrected by obtaining the deviation, the width of the printing paper is calculated from the difference between the left end position and the right end position, the number of characters that can be printed on one line of the attached printing paper is calculated, and printing is possible. By performing processing so that the print data that exceeds the number of characters is not printed, it is possible to eliminate the print misalignment due to the misalignment of the mounting position of the print paper, and it is also possible to prevent the print that exceeds the print paper. There is an effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of an example of a printing apparatus to which the embodiment of FIG. 1 is applied.

[Explanation of symbols]

 1 Paper Detection Sensor 2 Paper Suppression Section 3 Reference Detection Sensor 4 Motor 5 Encoder 6 Timing Belt 7 Shielding Plate 11 Left Edge Detection Circuit 12 Left Edge Position Calculation Circuit 13 Right Edge Detection Circuit 14 Right Edge Position Calculation Circuit 15 Reference Detection Circuit 16 Reference Position Calculation Circuit 17 Control unit

Claims (1)

[Claims] 1. A paper detection sensor for detecting a mounting position of a printing paper mounted on a printing device, a left end detection circuit for detecting a left end position of the printing paper by a signal from the paper detection sensor, and the paper detection sensor. A right edge detection circuit for detecting the right edge position of the print sheet by a signal from the reference sheet, a reference detection sensor for transmitting a signal related to the reference position of the print sheet, and a reference detection circuit for detecting the reference position by the signal from the reference detection sensor. An encoder for detecting the amount of movement of the paper holding unit, a signal from the left end detection circuit and a left end position calculation circuit for calculating a left end position of printing by inputting a signal from the encoder, and a signal from the right end detection circuit And a signal from the right end position calculation circuit for calculating the right end position of printing by inputting a signal from the encoder and a signal from the reference detection circuit and And a signal from the encoder to calculate the reference position of the print sheet, and a signal from the left end position calculation circuit, the right end position calculation circuit and the reference position calculation circuit to start printing. A print position control device comprising: a control unit that controls the position and the number of prints.