JPH0313365A - Reverse line feed control system for printer - Google Patents

Abstract

PURPOSE:To always apply a tension of a sheet in a positive direction by reversely line feeding more by a stopping position correcting line feeding amount in case of reverse line feeding, and then effecting line feeding by the stopping position correcting line feeding amount in the positive direction. CONSTITUTION:If a reverse line feed command of 2/3'' of line feeding amount is received to line feed to next printing line 3 when a printing head 1 is disposed at a present column 2, a printing sheet is first reversely line fed by 2''/3+1''/3=1'' if a stopping position correcting line feeding amount is 1/3''. Then, it is line fed by 1/3'' of the stopping position correcting line feeding amount in a positive direction to reversely line feed by 2/3'' designated by a reverse line feed command.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an IC control system for reverse line feed in a printer.

[Conventional technology]

Conventionally, a method for executing a backward line feed command in a printer equipped with a backward line feed mechanism has been to cause the printing paper to line feed in the opposite direction by a specified line feed amount.

[Problem to be solved by the invention]

Therefore, due to the looseness of the transmission mechanism between the line feed motor and the line feed of the printing paper, when a line feed is performed to an arbitrary print line by a forward line feed command, and when the same line is printed by a reverse line feed command, If a line break is made, the disadvantage is that the printing position will vary.

[Means to solve the problem]

In the present invention, when performing a line feed in the reverse direction, the line feed is performed in the reverse direction as many times as the line feed amount for stopping position correction, and then the line feed is performed in the forward direction by the line feed amount for stopping position correction. Since the line feed direction always ends in the positive direction when starting a line, the tension of the paper can always be applied in the positive direction.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 diagrammatically shows the operation of an embodiment of the present invention. FIG. 1(a) shows the case where the print head 1 is in the current state 2. Here, the line feed amount is 2 in order to start the next print line 3.
Suppose that a backward line feed command of /3 is received. If the line feed amount for stop position correction in this embodiment is set to 1/3#, printing paper will not be generated in the opposite direction.

〔Effect of the invention〕

As explained above, by using the backward line feed control method of the present invention, even when there is a backward line feed command, printing can be performed at the same printing position as a forward line feed, resulting in excellent printing. This has the effect of providing a high quality printer.

line break only. This state is shown in FIG. 1(b). Next, if you feed a line in the forward direction by 1/3' of the line feed amount for stop position correction, it means that you have performed a line feed in the reverse direction by 2/3'' specified by the backward line feed command. Figure (c
) K is shown.

Further, this process is shown in a flowchart [7] in FIG.

When the line feed ends on the next print line 3, the print paper is under tension in the forward direction, and the tension of the paper is the same as when the line feed is started on the next print line 3 using the forward line feed command. As a result, the printing position may be misaligned.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the operation of an embodiment of the present invention. FIG. 2 is a flowchart of this embodiment. In the figure, 1...print head position, 2...
...Current print line, 3...Next print line.

Claims (1)

[Claims] When executing a reverse line feed command on a printer equipped with a reverse line feed mechanism, perform a reverse line feed by an amount equal to the specified reverse line feed amount plus the stop position correction line feed amount for a fixed reverse line feed amount. A reverse line feed control method for a printer, characterized in that the line feed is performed in the forward direction by the amount of line feed for correcting the stop position, thereby executing a reverse line feed at an arbitrary position.