JPS63116887A - Paper use-up detection method - Google Patents

Abstract

PURPOSE:To make common the printing results of printers of different paper use-up detection positions, and to contrive a common processing when a paper is exhausted, by a method wherein a printing is stopped when the count value of a present printing position coincides with the set value of a position when the printing is to be stopped. CONSTITUTION:A paper use-up control circuit 9 outputs a paper feed counter set direction signal 31 by receiving a detection signal 35 from a paper use-up detection sensor 10 and, moreover, checks the information of a paper feed counter 8 and a printing interrupt counter 11 by a counter sense signal 30 and a printing interrupt counter sense signal 36, and outputs an abnormal signal 37 when the count values are identical with each other. Since, at this time, the value for a printing stop position is set in the printing interrupt counter by a host computer through a printing interrupt counter signal 25 from an interface 1, an abnormal signal 37 is outputted to stop printing when the count value of the paper feed counter 8 is subtracted to coincide with the count value of the printing interrupt counter 11.

Description

TECHNICAL FIELD The present invention relates to a paper out detection method, and more particularly to a paper out detection method for a dot impact printer.

Conventional technology Conventionally, in dot-impact printers, when a paper-out detection sensor detects the paper-out position of printing paper, an abnormal signal is sent to the host computer.The installation position of this paper-out detection sensor is determined by Since this was determined individually for each printer model, the paper out position detected by the paper out sensor was different for each printer model.

In such conventional dot impact printers, the paper out detection position differs depending on the model, so
When outputting a large amount of data to a printer from an application on a host computer, if the application operates without being aware of the printer model, the printer's print results may be different during the recovery process when paper runs out, or the print results may not be as expected by the application. This has the disadvantage that there are cases where recovery is impossible.

For example, for a printer whose paper out detection position is far from the printer head bin, a host computer application will output a certain number of data separated into sections, and even when paper out is detected, all the data sent to the printer's buffer will be output. When printing on the same paper, if you replace your printer with a printer whose paper out detection position is closer to the printer head bin than this printer, some of the data sent to the printer's buffer will be transferred to the paper when paper out is detected. If the data cannot be printed, the data that could not be printed will be printed on the next sheet, which may result in different print results.

Purpose of the Invention The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional printers, and it is possible to standardize printing results among printers with different paper out detection positions and to standardize processing when paper out occurs. The purpose is to provide a paper out detection method.

Structure of the Invention The paper out detection method according to the present invention is provided with a print stop position setting means for setting a position on the print paper in advance at which the printing is desired to be stopped, and a print position counting means for counting the current print position, It is characterized in that the printing is stopped when the value of the printing stop position setting means and the value of the printing position counting means match.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, an interface 1 that sends and receives data from a host computer (not shown), a data buffer 2 that stores the data, a control circuit 3, a printer head bin control circuit 4, a radbin 5 to the printer, and a paper feed control circuit. circuit 6
, a paper feed motor 7, a paper feed counter 8 (not shown) that indicates the current line of printing paper, a paper out i control circuit 9 that notifies the control circuit 3 that the paper is out, and a paper out detection that detects when the printing paper is out of paper. It is composed of a sensor 10 and a printing interruption counter 11 that sets the printing stop position.

The interface 1 receives an interface signal 21 from the n upper-level machines, outputs a data signal 22, a control signal 23, and a print interruption counter signal 25, and outputs a response signal 24.
After receiving the information, the content is sent as an interface signal 21 to the host computer.

Data buffer 2 receives data signal 22, stores the data, and outputs the data in data buffer 2 as data signal 27 in response to data address instruction signal 26.

The control circuit 3 checks the abnormality signal 37 in order to output data according to the control signal 23, and if there is no abnormality, outputs a data address instruction signal 26, a data output instruction signal 28, and a paper feed instruction signal 29.

When the abnormality signal 37 indicates an abnormality, the response signal 2
Notify 4 of the abnormality.

The printer head bin control circuit 4 receives the data signal 27 and the data output instruction signal 28, outputs a Radbin operation instruction signal 33 to the printer, and causes the Radbin 5 to execute printing. The paper feed control circuit 6 receives the paper feed instruction signal 29 and sends the paper feed instruction signal 3 to the paper feed motor 7.
4 and outputs the paper feed counter subtraction signal 32.
Output. Paper feed counter 8 indicates paper feed decrease ■ signal 3
2, the counter value is decreased, and the paper feed counter set instruction signal 31 sets the counter value to the initial value (the total number of lines on the printing paper).

Paper out i, II t211 l1lil path 9 is detected by the paper out detection signal 35 from the paper out detection sensor 10.
A paper feed counter set instruction signal 31 is output. Furthermore, the contents of the paper feed counter 8 and the print interruption counter 11 are checked using the counter sense signal 30 and the print interruption counter sense signal 36, and if the counter values are the same, an abnormality signal 37 is output.

At this time, the value of the position at which printing is to be stopped is set in the printing interruption counter by the host computer via the printing interruption counter signal 25 from the interface 1 (the value of the position at which printing is to be stopped is set in the printing interruption counter by the printing interruption counter signal 25 from the interface 1). Therefore, when the counter value of the paper feed counter 8 is subtracted and matches the counter value of the print relay counter 11, an abnormality signal 37 is outputted and printing is stopped.

After printing has stopped, when the paper out detection signal 35 from the paper out detection sensor 10 is sent to the paper out circuit 9, this is notified to the control circuit 3 and the paper is fed to the leading edge of the next printing paper. Then, the paper feed counter 8 starts decrementing the next printing paper.

In this way, the paper feed counter 8 indicates the current printing position.
By outputting an abnormality signal 37 and stopping printing when the value of the printing interruption counter 11 matches the value of the printing interruption counter 11, the counter value of the printing interruption counter 11 can be changed from the application of the host computer. paper out detection sensor 10 because the stop position can be freely set.
Printing results can be shared among printers installed at different locations, and processes when paper runs out can be shared.

In one embodiment of the present invention, the value of the paper feed counter 8 indicating the current printing position is the number subtracted from the total number of lines on the printing paper, but it may also be a number added from the leading edge of the printing paper. The value of the printing interruption counter 11 may be set to the number of lines from the leading edge of the printing paper to the desired stop position. Also,
The paper out detection sensor 10 may or may not be included, and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, the value of the print position h runt means for counting the current print position and the value of the print stop position setting means for setting the position at which printing is desired to be stopped are different. By stopping printing when a match occurs, it is possible to standardize the printing results among printers with different paper-out detection positions, and to standardize the processing when paper-out occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. Explanation of symbols of main parts

Claims (1)

[Claims] A print stop position setting means for setting a position at which printing is desired to be stopped on the printing paper in advance, and a print position counting means for counting the current print position are provided, and the value of the print stop position setting means and the printing position are set. A paper out detection method characterized in that the printing is stopped when the value of the position counting means matches.