JPH0516459A - Device for automatically setting paper feed position of printer - Google Patents

Abstract

PURPOSE:To oppose the predetermined printing start position of paper to a printing position when the paper is inserted at the printing position. CONSTITUTION:The distance between the paper sensor 6 arranged on this side in a paper feed direction from a printing head and a printing position is preliminarily stored and a printing start position is set by an operation panel 13 and this set value L is controlled on the basis of the output of a motor quantity-of- rotation counter 10 counting the feed quantity of paper so as to feed the paper by the total distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer paper feed position automatic setting device, and more particularly to a printer paper feed position automatic setting device capable of automatically setting a paper feed position to a print start position.

[0002]

2. Description of the Related Art In a conventional paper feed position automatic setting device in a printer, a paper sensor detects the leading edge of a printing paper inserted in the printer and a predetermined distance from the installation position of the sensor to the installation position of the print head. Only the paper is fed to the print head side, and the print start position is limited to the leading edge of the print paper.

A conventional paper feed position automatic setting device of a printer will be described with reference to the drawings.

FIG. 4 is a block diagram of a main part of a conventional paper feed position automatic setting device in a printer.

FIG. 5 is a flowchart of a conventional paper feed position automatic setting mechanism.

FIG. 6 is a cross-sectional view of the basic construction of a general printer device, showing a paper feeding state of printing paper by a conventional paper feeding position automatic setting device. 6 is composed of FIG. 6A and FIG. 6B, and FIG. 6A shows a time point when the leading edge 5 of the printing paper 1 reaches the position of the paper sensor 6, and FIG.
(B) shows the time when the leading edge 5 of the print sheet 1 reaches the position of the print head 7, that is, the time when the leading edge 5 of the print sheet 1 reaches the initial print start position. In the figure, a indicates the distance between the paper sensor 6 and the print head 7.

The sheet feeding position automatic setting device operates a printer main control section 8, a sheet sensor 6 for detecting the leading edge 5 of the printing sheet 1, a sheet feeding roller 4 for feeding the printing sheet 1, and a sheet feeding roller 4. A paper feed motor 9 for driving, a motor revolution counter 10 for counting the number of revolutions of the motor of the paper feed motor 9, etc. (by the number of steps of the motor), and a position between the installation position of the paper sensor 6 and the installation position of the print head 7. Paper feed position memory 1 in which the number of rotations of the motor of the paper feed motor 9 corresponding to the distance a (hereinafter referred to as “reference value” if necessary) is stored (in the number of steps of the motor, etc.)
1 and a comparator 1 for comparing the count value of the motor rotation speed counter 10 and the value stored in the paper feed position memory 11
2 and.

When the printing paper 1 is inserted through the paper insertion port 3 (step 20 in FIG. 5, hereinafter simply referred to as "step"), the paper feeding motor 9 is driven to operate the paper feeding roller 4 so that the printing paper 1 is printed by the printer. It is supplied to the print head 7 inside the apparatus 2 (step 21). When the leading edge 5 of the printing paper 1 is detected by the paper sensor 6, a signal is transmitted to the motor rotation speed counter 10 (step 22), the count value of the motor rotation speed counter 10 receiving the signal is reset to zero, The counting is started again (step 23). The count value is sequentially transmitted to the comparator 12 and sequentially compared with the reference value a stored in the paper feed position memory 11, and when the count value reaches a value equal to the reference value a, the paper feed motor 9 A stop signal is transmitted to the paper feed motor 9 (step 24), the paper feed motor 9 is stopped, and the paper feed roller 4 is also stopped (step 25). Printing on the printing paper 1 is started from this position.

[0009]

However, since the printing start position is set in advance in such a printer device, the same printing result as when using another kind of printer device, that is, by another printer is used. When it is necessary to start printing from the same position as the print start position of the printed matter, after sending the print paper, the host side such as the computer transmits a paper feed control code such as a line feed code to the printer device, Alternatively, there is a drawback in that the print start position, that is, the print paper has to be shifted depending on whether a line feed switch or the like installed in the printer device is used or the paper is fed manually.

Further, in the printer using the paper feed control code from the host side as described above, since neither the host side nor the printer side has a means for detecting and confirming the actual paper feed amount, printing is desired. It is often out of position. For this reason, it is necessary for the user to carry out trial printing several times for visual confirmation and the like, and there is a drawback that time and printing paper are wasted. An object of the present invention is to improve this point, and an object thereof is to provide a paper feed position automatic setting device for a printer in which print paper is automatically fed to a desired print start position.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a print head, a paper feed means for feeding print paper to the print head, and an arrangement at a predetermined position between the paper feed side of the print paper and the print head. A paper sensor for detecting the leading edge of the printed paper, holding means for holding the distance between the print head and the paper sensor, and counting means for counting the amount of the fed print paper. In the paper feed position automatic setting device of the printer,
Print start position input means for inputting a print start position at a desired distance from the leading edge of the print paper, and the contents of the holding means and the input print start position from the time when the sensor output from the paper sensor is received. And a control means for feeding the print paper toward the print head based on the count content of the counting means.

[0012]

Therefore, the printing paper can be automatically fed and stopped at the printing start position at a desired distance from the leading edge of the printing paper desired by the user.

[0013]

An embodiment of the present invention will be described with reference to the drawings.

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

In FIG. 1, the same symbols as those in FIGS. 4 and 6 indicate the same components as those in FIGS. 4 and 6, respectively.

1 is compared with the conventional apparatus shown in FIG. 4, an operation panel 13 for inputting a desired print start position value and a conversion for converting the input print start position value into the number of steps of a motor. Device 14 and the converter 14
Memory 15 for storing the number of steps from
And a control unit 17 storing a control program based on the flowchart shown in FIG. 2.

Here, the memory 15 has E as a constituent member.
An EPROM (electrically erasable and writable read-only memory) is used to hold the input information even after the power of the printer device is turned off.

FIG. 2 is a flow chart of an embodiment of the present invention.

FIG. 3 is an explanatory diagram for explaining the operation of the embodiment of the present invention. FIG. 3 is composed of FIG. 3A and FIG. 3B, and FIG. 3A shows the time when the leading edge 5 of the printing paper 1 reaches the position of the paper sensor 6, and FIG. The time point when the leading edge 5 of the printing paper 1 is fed to the desired print start position from the paper sensor 6 is shown. In FIG. 3, a indicates the distance between the paper sensor 6 and the print head 7, and L indicates the distance from the tip 5 of the print paper 1 input and stored by the user to the desired print start position.

Further, in FIG. 3, the same symbols as those in FIG. 6 indicate the same components as those in FIG.

[0021]

[Operation] The characteristic operation of the present invention configured as described above will be described.

The user uses the operation panel 13 to input the desired print start position value L from the leading edge of the print paper. (FIG. 2, step 30, hereinafter simply referred to as “step”). The input is converted by the converter 14 into the number of steps of the paper feed motor 9 (step 31), and the memory 1
5 is input and stored (step 32). Adder 16
Then, the distance a between the print head 7 and the paper sensor 6 stored in advance in the paper feed position memory 11 and the print start position value L stored in the memory 15 are added, and the adder 1
The value in 6 becomes (a + L) (step 33). In this state, when the printing paper 1 is inserted from the paper insertion opening 3 (step 34), the paper feeding motor 9 is started by the control unit 17 and the printing paper 1 is supplied into the printer 2 (step 35). As shown in FIG. 3A, when the leading edge 5 of the printing paper 1 is detected by the paper sensor 6, a signal is transmitted to the motor rotation speed counter 10 by the control unit 17 (step 36) and the signal is received. Motor speed counter 10
Is reset to zero (step 37).
From this state, the print sheet 1 is fed by the reference value a and further by the print start position value L. That is, the paper is fed by (a + L) from the time when the leading edge 5 of the printing paper 1 reaches the position of the paper sensor 6, and the motor rotation speed counter 10
When the comparator 12 outputs that the value of has reached (a + L), a stop signal is transmitted to the paper feed motor 9 (step 38), the paper feed motor 9 stops, and at the same time the paper feed roller 4 also stops (step 39). .. As a result, FIG.
As shown in (B), the input print start position of the print sheet 1 is stopped at the position of the print head 7.

As described above, in the printer equipped with the paper feed position automatic setting device according to the embodiment of the present invention, the print paper stops at the desired print start position at the distance L from the leading end of the print paper.

[0024]

According to the present invention, the print head, the paper feed means for feeding the print paper to the print head, and the print disposed at a predetermined position between the paper feed side of the print paper and the print head. A paper supply unit for a printer including a paper sensor for detecting the leading edge of paper, holding means for holding the distance between the print head and the paper sensor, and counting means for counting the amount of the print paper fed. In the automatic paper position setting device, the print start position input means for inputting a print start position at a desired distance from the leading edge of the print paper, and the contents of the holding means from the time when there is a sensor output from the paper sensor And a control means for feeding the print paper toward the print head based on the count content of the counting means by the total distance from the input print start position.

Therefore, the printing paper can be automatically fed and stopped at the printing start position at a desired distance from the leading edge of the printing paper desired by the user, which allows the line feed switch to be operated as in the conventional apparatus. And has an excellent effect that there is no need to perform trial printing.

[Brief description of drawings]

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

FIG. 2 is a flowchart of one embodiment of the present invention.

FIG. 3 is an explanatory view showing a feeding state of the printing paper according to the embodiment of the present invention, and FIG. 3 (A) shows a time when the front end of the printing paper reaches the position of the paper sensor. (B) shows the time when the leading edge of the printing paper reaches the set desired printing start position (distance from the paper sensor is a + L).

FIG. 4 is a block diagram of a main part of a conventional paper feed position automatic setting device.

FIG. 5 is a flowchart of a conventional paper feed position automatic setting mechanism.

FIG. 6 is a cross-sectional view of a basic configuration of a general printer, and is an explanatory view showing a feeding state of printing paper by a conventional paper feeding position automatic setting device, and FIG. The time when the leading edge of the paper reaches the position of the paper sensor is shown in FIG.
(B) shows the time when the leading edge of the print paper reaches the position of the print head, that is, the time when the paper reaches the print start position (distance a from the paper sensor) set during printer manufacturing.

[Explanation of symbols]

1 Printing Paper 2 Printer 3 Paper Inserting Port 4 Paper Feeding Roller 5 Paper Tip 6 Paper Sensor 7 Print Head 8 Printer Main Control Section 9 Paper Feeding Motor 10 Motor Rotation Counter 11 Paper Feeding Position Memory 12 Comparator 13 Operation Panel 14 Converter 15 memory 16 adder 17 control unit a distance between print head and paper sensor L arbitrary print start position (distance from paper tip to print start position)

Claims (1)

Claim: What is claimed is: 1. A print head, a paper feed means for feeding print paper to the print head, and a print head provided at a predetermined position between the print paper feed side and the print head. A paper sensor for detecting the leading edge of the print paper; a holding means for holding the distance between the print head and the paper sensor; and a counting means for counting the amount of the print paper fed. In a paper feed position automatic setting device of a printer, a print start position input means for inputting a print start position at a desired distance from the leading edge of the print paper, and the holding means from the time when there is a sensor output from the paper sensor. And a control means for feeding the print paper in the print head direction based on the counting content of the counting means by the total distance between the content of the above and the input print start position. Paper feed Position automatic setting device.