JPH03175070A - Page control apparatus at time of paper end in printer - Google Patents

Abstract

PURPOSE:To easily regulate a page at the time of recovery when a paper end is detected to stop printing by stopping a printer when a paper end state occurs, and storing a line feed amount from the head position of its page when the end state occurs. CONSTITUTION:If a paper end occurs, a line feed end process is called, a motor is stopped, and a timer is not restarted. If a paper end state is released, the value of a line feed amount counter LFCNT before the paper end occurs is set to a register PELF. In this case, the counter LFCNT stores a position at the time of the paper end as a line feed amount from TOF position of its page. Accordingly, after it is recovered from the paper end state, if a line feed com mand is input from an external unit, a line feed start process is started. The value of line feed amount PELF from the TOF position before the paper end is added to the line feed command amount LFOUT to be executed this time.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a printer that can print on continuous paper and single paper and has a function of detecting the paper end state. This relates to a page management device when paper is set and restored.

(Prior art) Conventionally, when a printing medium such as continuous paper or single paper is torn or folded during printing, the printer detects the paper end state and automatically stops printing. There is.

At this time, the inside of the printer recognizes the paper end position and resumes printing using various methods.

Figure 5 is a diagram showing the relationship between the positions of the print medium and the print head at the time of paper end and at the time of recovery, Figure 5 (A) is a state diagram at the time of paper end, Figure 5 (B) and Figure 5 (C ) is a state diagram at the time of recovery.

In the figure, for example, as shown in FIG. 5(A), if a paper end state is detected when the print head is in the middle of the perforation of the print medium, the printer is stopped by the page management device inside the print head, and the printer is stopped. Either set a new print medium and restart printing as shown in Figure 5 (B), or feed a new print medium to the position where the printer stopped and then print again, as shown in Figure 5 (C). is restarting.

(Problem to be solved by the invention) However, in the above conventional page management device,
As shown in FIG. 5(B), when a new print medium is inserted and printing is restarted, subsequent page management will be erroneous.

Figure 6 is a diagram showing an example of printing when page management is misaligned, Figure 6 (A) is a diagram showing an example of printing in the case of continuous paper, Figure 6 (
B) is a diagram showing an example of printing on a single sheet of paper.

As shown in Figure 6 (A), when printing using continuous paper, when setting a new print medium and restarting printing, it is possible that a thin line will appear in the middle of the page. be. In addition, as shown in Figure 6 (B), cut sheets and
When printing on a single sheet of paper using a device such as a feeder, when setting a new print medium and restarting printing, one page will be printed on two sheets of paper. .

In addition, as shown in Figure 5 (C), when the print medium is set, if the print medium is fed by the amount of deviation in advance and printing is resumed, subsequent page management will not be changed, but manual operation will be necessary. Since the feed is performed, the amount of feed becomes uneven, and some deviation may occur. In addition, the operation at that time requires feeding by referring to the last printing result at the vapor end, which is troublesome.

The present invention solves the above-mentioned problems of the conventional page management device, and provides a page management device at the time of vapor end in a printer that can easily perform page adjustment at the time of recovery when paper end is detected and printing is stopped. is intended to provide.

(Means for Solving the Problems) To this end, the present invention provides a microprocessor and a page management device when a paper end occurs in a printer that performs line feed using a line feed motor and prints on continuous paper or single paper. If a paper end condition occurs in the middle of a page due to paper tearing or folding,
Detect paper end condition.

Further, there are provided means for stopping the printer when the paper end condition occurs, and means for storing the line feed amount from the top position (TOP position N) of the page when the paper end condition occurs, and a means for storing the line feed amount from the top position (TOP position N) of the page when the paper end condition occurs. is set, that is, when the paper end state is released, the line feed is automatically carried out to the vapor end occurrence position.

(Function) According to the present invention, when a paper end state occurs in the middle of a page due to paper tearing or folding as described above, the printer is stopped and the top position of the page (T
The line feed amount from the OF position) is stored.

Then, when a new sheet is set, the paper end state is released, and when data is received from an external device and printing is started, the sheet is fed in advance by the memorized line feed amount.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 4 is a block diagram of a page management device at the end of paper in a printer showing an embodiment of the present invention.

In the figure, 101 is a microprocessor (CPU);
102 is a ROM in which programs and character pattern data are stored, and 103 is a RAM which stores received data from the outside and is used as a working memory.

The microprocessor 101 sends an output to the Ilo driver 104 to drive it. The I10 driver 104 includes a vapor end sensor 105 for detecting whether a print medium such as continuous paper or single paper is sent to the printer, and an interface circuit 106 for connecting with an external device.
, a print head 107, a space motor 108 that moves the print head 107 laterally, and a line feed motor 109 that performs line feed.

Registers are provided in the internal RAM of the microprocessor 101 and the external RAM 103.

Next, the operation of the page management device at the end of paper in the printer of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a flowchart showing the line feed start processing of the page management device at the time of paper end in the printer of the present invention, FIG. 2 is a flowchart showing the line feed interrupt processing, and FIG. 3 is a flowchart showing the background processing.

When receiving data and commands sent from an external device via the interface circuit 106, the printer executes printing and line feed in accordance with the data and commands.

Step line feed start processing starts.

Step ■ The line feed amount (PELF) before the paper end is checked. When a paper end state occurs, the line feed amount from the TOF position on the page at that time is set. In normal times when a paper end state does not occur, the flag is initialized to "O" by an initial process (not shown).

Step ■ If PELF is not O, register LPOU where the line feed amount supported by the external device is set.
The line feed amount PELF before the paper end is added to T. Since PELF is normally O, the process proceeds to step (2).

Step (2) Start a timer in the microprocessor 101 to start line feed interrupt processing. When the timer overflows, an interrupt occurs as shown in FIG.

Step ■ Line feed interrupt processing starts.

Step @ The line feed execution processing subroutine is called, operations such as phase switching of the line feed motor are executed, and the line feed amount is stored in the register FEBD.

Step @ Add the executed line feed amount FEED to the line feed amount counter LFCNT and update it.

Step [phase] Perform page management. In other words, PAGEL indicates the page length specified by the command from the external device.
Subtract the updated line feed amount counter LFCNT from P,
The result is stored in working register WREG.

Step @ The value of working register WREG is “O”
If it is larger, proceed to step ■.

Step ■ If it is still within the page and is less than “0”,
This will move you to the next page. Therefore, the absolute value of the value of the working register WREG is newly set in the line feed amount counter LFCNT, and the page is updated. In this way, the line feed amount counter LFCNT indicates the current position within the page as the line feed amount from the TOF position.

Step ■ Next, subtract the executed line feed amount FEED from the value of the specified line feed ILFOIIT and write it in the register LP.
Store in OUT.

Step ① Check the value of register LPOUT.

If the value of the register LFOtlT is "0", this means that the current line feed processing has been completed, and the process advances to step [stock].

Step [Phase] If the register LFOtlTO value is not 0'', all line feeds have not been completed yet, and the timer is set and restarted in order to continue executing the line feed interrupt process.

Step [stock] Call line feed end processing,
Do not restart the timer to stop the motor and prevent line feed interrupt processing.

Next, the background processing performed during the line feed interrupt processing will be explained with reference to FIG.

Step 0 Start background processing.

Step @ Monitor the entire state of the paper end sensor 105.

Step 0: If the paper end state is not present, continue monitoring the paper end state while executing other background processes.

Step [Phase] When the paper end occurs while executing the line feed in this way, the same line feed end process as in step Φ above is called, the motor is stopped, and the timer is restarted so as not to execute the line feed interrupt process. Don't let it start.

Step @ [phase] The paper end process is executed until the paper end state is canceled by the operator setting paper, etc., and the printer lamp is turned on or blinks, or a signal is sent to an external device to stop the paper end state. Notify me of something.

Step 0 When the paper end state is released, the value of the line feed amount counter LFCNT before the vapor end occurs is set in the register PELP.

At this time, as described above, the line feed amount counter LFCNT stores the position when the paper end occurs as the line feed amount from the TOF position of the page.

Therefore, after recovering from the paper end state, when a line feed instruction is received again from the external device, the line feed start process of step (2) is started. At this time, register PE
Since LF is not “0”, step ■ to step ■
Then, the value of the line feed amount PELF from the TOP position before the paper end is added to the line feed instruction amount LPOUT to be executed this time.

In this manner, during the first line feed process after paper end recovery, a line feed is performed from the TOF position of the page at that time to the paper end occurrence position.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described above in detail, according to the present invention, when a paper end state occurs in the middle of a page due to paper tearing or folding, the printer is stopped and the page is The amount of line feed from the first position If (TOF position) is stored. Then, when a new sheet is set, the paper end state is released, and when data is received from an external device and printing is started, the sheet is fed in advance by the memorized line feed amount.

Therefore, simply by setting a new sheet of paper at the TOF position and restarting printing, the line feed is automatically performed to the position where the paper end occurs within the page.

Therefore, when printing is resumed, the edges of the paper will not fall within the page. Further, the page after printing is restarted can be printed normally.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the line feed start processing of the page management device at the end of paper in the printer of the present invention, FIG. 2 is a flowchart showing line feed interrupt processing, FIG. 3 is a flowchart showing background processing, and FIG. The figure is a block diagram of a page management device at the end of paper in a printer showing an embodiment of the present invention. A) is a state diagram at the time of paper end, Figures 5 (B) and 5 (C) are state diagrams at the time of recovery, and Figure 6 is a diagram showing an example of printing when page management is misaligned. (A) is a diagram showing an example of printing on continuous paper, and FIG. 6(B) is a diagram showing an example of printing on single paper. 101...Microprocessor, 102...RO?
I, 103...RAM, 104...Ilo
Driver, 105... Paper end sensor, 109...
...Line feed motor.

Claims (1)

[Scope of Claims] A page management device at the end of paper in a printer that prints on continuous paper or single paper by inserting a line feed using a line feed motor, comprising: (a) a microprocessor; (b) a paper end that detects a paper end state; (c) a means for stopping the printer when a paper end condition occurs; (d) a means for storing a line feed amount from the top position of the page when a paper end condition occurs; and (e) a new printer. 1. A page management device for a printer at the time of paper end, characterized in that it has means for automatically starting a line feed to a paper end occurrence position when paper is set.