JPH01208152A - Printing control system - Google Patents

Abstract

PURPOSE:To prevent the blur or irregularity of printing due to the voltage drop of a power supply, by monitoring the voltage of the power supply and performing printing by 1/n of the number of dots in one longitudinal row from a voltage drop position and forming printing by performing scanning (n) times. CONSTITUTION:An A/D converter 1 converts the voltage value of a power supply to a digital value and a printing control part 2 controls a printing head driver 3 and a lateral motor driver 4 while monitoring the voltage converted to the digital value. A receiving data editing part 5 edits receiving data to deliver printing data to the printing control part 2. The printing control part 2 detects that the voltage value of the power supply becomes less than a certain reference value to control the printing head driver 3 and the lateral motor driver 4 so as not only to perform printing by 1/n of the number of dots arranged in one longitudinal row on and after the detection point of time but also to perform the printing of the remaining dots.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing control system, particularly to a printing control system in a dot impact printer.

[Conventional technology] Conventionally, printing control in dot impact printers was
Calculate the dot density before printing, and if the density exceeds the standard value, print by 1/n over the entire line and print in n scans to prevent voltage drop. was forming.

[Problem to be solved by the invention]

In this way, in conventional printing control, control is performed by calculating the dot density for each character before printing. Voltage drops due to environmental factors such as temperature cannot be detected, resulting in blurred or uneven printing. - Therefore, an object of the present invention is to provide a printing control method in which printing quality is not affected by voltage drop.

[Means to solve the problem]

According to the present invention, there is provided a dot impact print head that forms dots on printing paper by passing a current through a coil to cause a wire to protrude, a means for detecting a power supply voltage, and a means for detecting a power supply voltage that is lower than a certain reference value. A means for memorizing the position that was being printed at the time of the voltage drop, a means for printing only 1/n of the number of dots lined up vertically after the voltage drop, and a means for resuming printing of the remaining dots from the memorized position. A printing control method having means for

〔Example〕

Next, the present invention will be described in more detail with reference to the drawings showing one embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, A/
The D converter 1 converts the power supply voltage value into a digital value.

The print control unit 2 controls the print head driver 3 and the lateral feed motor drive 4 while monitoring the voltage converted into a digital value. The received data editing section 5 edits the received data and passes the print information to the print control section 2. When it is detected that the power supply voltage has fallen below a certain reference value, the printing control unit 2 prints only 1/n of the number of dots lined up vertically after the detection time, and then prints the remaining dots. The print head drive 3 and the traverse motor drive 4 are controlled to perform the operation.

Figure 2 shows the first and second print data and the final print data when the value of n is 2 in the print control unit 2 and only odd number dots are printed in the first scan and only even number dots are printed in the second scan. Shows the printing results. The printing control unit 2 monitors the power supply voltage during printing, and if it drops below a certain reference value, it stores the position A and thereafter prints only odd numbered dots. Next, the print head is returned to its original position and a second scan is performed to print only even numbered dots from the stored position A.

In this embodiment, the maximum number of wire drives is reduced by half when a voltage drop is detected.
Further voltage drop can be prevented.

〔Effect of the invention〕

As explained above, according to the present invention, by monitoring the power supply voltage and printing by 1/n of the number of dots in a vertical line from the position where the voltage has decreased, printing is formed in 0 scans. It is possible to prevent blurred and uneven printing that occurs when a drop in power supply voltage cannot be detected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of printing results according to the embodiment. 1: A/D converter, 2: Print control unit, 3: Print head driver, 4: Traverse feed motor driver, 5: Reception data editing unit, 6: Print data of the first scan, 7 = Print data of the second scan ,82I! the final print result. Agent Patent Attorney Uchihara Sound Diagram Z

Claims (1)

[Claims] A dot impact print head that forms dots on printing paper by passing a current through a coil to make a wire protrude, means for detecting a power supply voltage, and printing when the power supply voltage drops below a certain reference value. means for memorizing the position where the dots were placed, means for printing only 1/n of the number of dots arranged in a vertical line after the voltage drop, and means for restarting printing of the remaining dots from the memorized position. A printing control method characterized by: