JPS59179379A - Printer - Google Patents

Abstract

PURPOSE:To enhance printing efficiency, by a method wherein a spacing-controlling circuit associated with the movement of a printing head is started simultaneously with completion of printing. CONSTITUTION:Printing data D1 fed from a processor 2 are stored into a buffer B1 through a contact (a) of a changing-over part 3. On the other hand, a direction signal L or R generated from a discriminating and controlling part 6 started by a printing command C is fed to the spacing-controlling part 7, whereby a printing part 5 is started to move, and after a predetermined velocity V0 is reached, printing of the printing data D1 stored in the buffer B1 is started. The changing-over part 3 is changed over to the side of a contact (b) by a changing-over command A fed from the part 6, so that the next printing data D2 fed from the processor 2 are stored in a buffer B2. When printing of the printing data D1 stored in the buffer B1 is completed (time t2), a printing completion signal E is generated, and a starting signal F is outputted from a detecting part 9. By this, a discriminating and controlling means in the part 6 is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to position control means for a moving print head (b)
Prior Art and Problems Printers are constantly required to increase printing speed. For this reason, two print buffers are provided, and while data in one print buffer is being printed, the reception and transfer of the data to be printed next is completed in the other print buffer in order to improve the printing speed. ing. In a serial printer that prints by moving the print head along a platen, it takes time to move the print head, so printing efficiency can be improved by efficiently utilizing this print head movement time. Printing is performed while moving the print head, and the print head is stopped immediately after printing is completed, but it takes time to stop the print head due to inertia.

In the conventional method, position control processing is performed to move the do to the next printing start position after the do is stopped for printing. On the other hand, if position control processing is performed at the same time as printing ends, the stopped print head is immediately moved to the next printing start position and printing starts (e) Purpose of the Invention The present invention focuses on the above points. The purpose is to provide a printing device that improves printing efficiency.

(d) Structure of the Invention The present invention includes a printing section, a motor that moves the printing section, a control section that drives and controls the motor, and a discrimination section, and the control section receives instructions from the discrimination section. A device for moving a printing section, comprising: a detection section that receives a printing completion signal emitted from the printing section and outputs a detection signal; and a means for activating the discrimination section based on the detection signal; The printing device is characterized in that, when a signal is issued, the discrimination section discriminates the next printing start position and supplies the obtained printing start position information to the control section.

(e) Examples of the invention The present invention will be explained below with reference to the drawings. FIG. 1 is a block diagram explaining one embodiment of the present invention, FIG. 2 is a time chart explaining one embodiment of the present invention, and FIG. 3 is a partial block diagram explaining one embodiment of the present invention. . The printer 1 in FIG. 1 executes printing upon receiving print data D from the processing device 2, and is provided with two buffers B and B2, which are switched between printing data and data by switching units 3 and 4.
-Can be switched to evening reception. Print data D is printed in print section 5
The printing unit 5 is sent to a pulse motor (
(not shown). The determination control unit 6 activated by the printing command C from the processing device outputs a direction signal L (leftward) specifying the moving direction of the printing unit 5.
and R (rightward) and outputs a stop signal SP. By receiving the direction signal R or R, the space control unit 7
The printing section 5 is stopped by controlling the leftward or rightward movement of the printing section 5 and receiving a stop signal SP.

The switching units 3 and 4 are switched by a switching command A from the discrimination control unit 6, and the memory monitoring circuit 8 is a circuit that monitors the addresses of the buffers B1 and B2.

FIG. 2 is a time chart showing the acceleration characteristics of the printing unit (carrier) 5 in FIG. 1, and the vertical axis is the moving speed v1.
The horizontal axis indicates time T. After the printing unit 5 is started at time t0, the printing unit 5 is started at a predetermined speed ① at time t1 as shown in the figure. , and printing is performed while the printing section 5 moves at this predetermined speed vo. That is, the time from time t1 to time t is the printing time. Even if printing is completed at time t, it takes time (due to inertia) for the printing unit 5 to stop.
It stops at time t. The above printing time (t+
-ta) means buffer B! in FIG. Or B2
This is the time required to finish printing the data within.

In FIG. 1, print data D1 from the processing device 2 is stored in the buffer B1 via the contact point (A) of the switching section 3.

On the other hand, the direction signal R or R issued from the discrimination control section 6 activated by the printing command C is sent to the space control section 7, so that the printing section 5 starts moving, and after reaching a predetermined speed Va, the buffer Bt Printing of the print data DI within is started. Switching unit 3, switching command A from discrimination control unit 6
Since the switch is made to the contact (b) side, the next print data D from the processing device 2 is stored in the buffer B.

In the buffer Bl 4--a print end signal E is issued, and the detection section 9 111 outputs an activation signal F. As a result, the discrimination control means in the discrimination control section 6 is activated. The details will be explained with reference to FIG. In the conventional system, a position detection circuit is provided in place of the detection section 90, so that when the printing section 5 stops at time t in FIG. 2, the stoppage is detected and the discrimination control section 6 is activated. It had become. In the present invention, printing ends (time tg
), the discrimination control section 6 is operated at the same time.

FIG. 3 is a block diagram illustrating the discrimination control operation of the discrimination control section 6 in FIG. 1. In FIG. 3, when printing data in the buffer Bi in FIG. For example, when moving the printing unit 5 to the left to print, a direction command is set in the register 11.The 0 discrimination unit 13 receives the activation signal F from the detection unit 9 in FIG. Information G and input B,
) and outputs flashing information at the final printing position. Accordingly, in FIG. 3, the keration discriminating section 13 next discriminates and determines the moving direction of the printing section 5 based on the position information G. For example, if the positional transition G indicates a value in which the stop position of the printing unit 5 is close to the right end, a signal r is emitted, and conversely, if the stop position is close to the left end, a signal
emits.

When the direction command ■7 is set in the register 11, when the signal t is issued from the discriminator 11, the command generator 14 outputs the direction 11.1 command, and conversely, when the signal r is issued, the command 11.1 is output. A stop signal SP is output from the signal generator 15. On the other hand, when the direction command R is set in the register 12, when the signal r is issued from the discriminator 13, the direction command R is output from the command generation section 16, and conversely, when the signal r is issued, the direction command R is A stop signal SP is output from the signal generator 17. The present invention is designed to operate the above-mentioned discrimination control operation simultaneously with the end of printing (time t2: see FIG. 2).

(f) Effects of the Invention As described above, the present invention has the advantage that printing efficiency can be improved because the space control circuit related to the movement of the print head can be activated at the same time as printing ends.

[Brief explanation of drawings]

FIG. 1 is a block diagram explaining one embodiment of the present invention, and FIG.
The figure is a time chart explaining one embodiment of the present invention.
The figure is a partial block diagram illustrating an embodiment of the present invention, and the symbols used in the figure are as follows.

Claims (1)

[Claims] a printing unit that prints while moving along the platen;
It has a motor that moves the printing section along the platen, a control section that drives and controls the motor, and a discrimination section, and the printing section is moved by giving a command from the discrimination section to the control section. The apparatus includes a detection section that receives a printing end signal emitted from the printing section and outputs a detection signal, and a means for activating the discrimination section based on the detection signal, and the printing end signal is emitted from the printing section. In the printing apparatus, the determining section determines the next printing start position and supplies the obtained printing starting position information to the control section.