Laser scanner using two scan motors independently controlled by a single signal
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United States of America Patent
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Nov 30, 1993
Grant Date -
N/A
app pub date -
Jan 11, 1991
filing date -
Jan 11, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual motor speed control circuit for providing independent speed control of two motors in a laser scanning device is disclosed herein. This apparatus utilizes a single input signal having variable frequency and duty cycle components. The speed of the first motor is controlled by utilizing the frequency component of said input signal while the speed of the second motor is controlled by utilizing the frequency and duty cycle components of said input signal. Specifically, a DC signal is generated that is dependent upon the duty cycle component of said input signal and said DC signal is utilized to offset the speed of the second motor from the speed value as determined by the frequency component of said input signal.
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