System and method for controlling the winding of a ribbon on a receiver reel
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United States of America Patent
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-
Nov 12, 1996
Grant Date -
N/A
app pub date -
Feb 23, 1995
filing date -
Feb 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system controls the winding of a ribbon on a receiver reel rotationally driven by a stepping motor. The ribbon has successive indicators at regularly spaced intervals on the ribbon. A detection device, having two spaced optical cells at a predetermined distance between them, detects the passage of an indicator between the cells. A microprocessor counts the number of steps of the stepping motor that have been necessary to achieve movement of an indicator between the optical cells. The microprocessor also computes the number of pulses to be applied to the stepping motor per unit time to achieve a constant speed of the ribbon as it passes between cells.
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