JPS60201965A - Printer with compensation for missing of dot - Google Patents

Abstract

PURPOSE:To enable to maintain favorable printing quality by compensating for missing of dots, by providing a detecting part for detecting and judging the presence or absence of a missed dot and the position thereof, and a controlling part, in a wire dot printer. CONSTITUTION:At the time of turning ON a power source or an initializing operation, a carrier part 3 is moved to the position of a piezoelectric element 5 for detecting missing of a dot, and in response to a signal from the controlling part 1, a printing head 4 sequentially releases all wires by one dot at a time relatively to the element 5 through a driving part 2. Simultaneously, the controlling part 1 judges the position of the missed dot. After printing a line, where a dot is missed, the controlling part 1 sends a signal to a line feed driving part 8 so that a normal printing wire is moved to the position of the missed dot, and a line-feeding motor 9 is driven to rotate a platen 10 to the position of the line, followed by printing only at the missed dot part in the line by the normal wire. Where missing of a dot is still present, the same printing as above is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a dot compensation printer, and more particularly to a wire dot type dot compensation printer.

(Prior Art) In conventional wire dot type printers, if the print head driver is damaged, the driver must be replaced, and if the print wire is broken, the print head must be replaced, otherwise dots will appear in the printed results. Therefore, there is a drawback that the print quality is greatly reduced until these replacement works are carried out.

(Objective of the Invention) The object of the present invention is to detect missing dots due to damage to the print head driver or bending of the print wire, and compensate for the missing dots with other normal print wires, thereby eliminating the above defects and improving print quality. A possible improvement in dot extraction lies in providing a compensating printer.

(Structure of the Invention) According to the present invention, there is provided a detection unit that detects the existence and position of missing dots due to damage to the print head driver or broken print wire, and a detection unit that detects the presence or absence and position of missing dots due to damage to the print head driver or broken print wire, and a detection unit that performs normal line printing when missing dots are detected. A dot compensation printer is provided, comprising: a controller for controlling printing of the same line at least once with a normal print wire;

(Example) Next, the present invention will be explained with reference to the drawings.

The figure is a block diagram showing an embodiment of the dot compensation printer of the present invention. In the figure, the printer is a controller 1.
, a print head driver section 2, a carrier section 3,
The dot extraction device comprises a print head section 4, a piezoelectric element 5 for detection, a cross-feed shifter section 6, a cross-feed shifter section 7, a line feed driver section 8, a line feed motor section 9, and a platen 10. .

When the power is turned on or during the initialization operation, the carrier section 3 is placed in the position shown in the figure, that is, the dot is placed in the position of the detection piezoelectric element 5.
The print head 4 is moved to the position shown in FIG. 1, and the print head 4 discharges all the wires one dot at a time to the detection piezoelectric element 5 in order through the print head driver section 2 in response to a signal from the control section 1.

At the same time, the control section 1 determines the position of the missing dot.

Next, if there is a missing dot after printing one line, the control unit 1 sends a signal to the line feed driver unit 8 and drives the line feed motor unit 9 so that the normal print wire comes to the position where the dot is missing, so that the platen 10 is Rotate and stop at the same line position. Thereafter, only a portion of the dots in the same row are printed using the normal print wire. Furthermore, if there is a position for dot punching, printing is performed in the same manner to complete printing of one line.

(Effects of the Invention) As explained above, the dot removal compensation printer of the present invention has a detection unit and a control unit that detect and determine the presence or absence and position of a missing dot, so that when a dot removal occurs, However, it has the effect of compensating for this and minimizing the deterioration in print quality.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the dot compensation printer of the present invention. In the figure, 1...control section, 2...print head driver section, 3...carrier section, 4...print head section, 5...piezoelectric element for detection for dot extraction, 6...transverse feed driver section , 7... horizontal feed) motor section, 8... line feed driver section, 9... line feed motor section, 10... platen @ agent, patent attorney Susumu Uchihara 6

Claims (1)

[Claims] A detection unit that detects the presence and location of missing dots due to print head driver damage or broken print wires, and when a missing dot is detected, performs normal line printing and then prints the same line at least once using another normal print wire. A dot-pull compensation printer, characterized in that it is equipped with a control unit that controls the printing of the dots.