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Removing the Play in the Stepper Motor Before Printing

IP.com Disclosure Number: IPCOM000041044D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Malcolm, JW: AUTHOR

Abstract

A method is described for automatically removing the play in the paper movement stepper motor to prevent vertical squeezing of the first two lines of graphic data. When paper is torn off of a printer, the paper is loosened from the paper holes pin feed and some play is introduced in the stepper motor that turns the pin feed. The first line of data absorbs this play as the paper is advanced to the next line. However, because of the play, the paper does not move the required amount, the print is distorted and the next line overlaps the first line.

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Removing the Play in the Stepper Motor Before Printing

A method is described for automatically removing the play in the paper movement stepper motor to prevent vertical squeezing of the first two lines of graphic data. When paper is torn off of a printer, the paper is loosened from the paper holes pin feed and some play is introduced in the stepper motor that turns the pin feed. The first line of data absorbs this play as the paper is advanced to the next line. However, because of the play, the paper does not move the required amount, the print is distorted and the next line overlaps the first line.

A method to avoid this problem is to automatically rotate the platen approximately 3/72 inch to absorb the play before each new printout. When the first blank area is encountered, reduce the requested line spacing to return the platen to the desired location. This method provides a simple yet effective method to prevent distorted printouts without impacting print jobs.

Anonymous

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