Stepper motor door control apparatus and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 16, 1985
Grant Date -
N/A
app pub date -
Mar 19, 1984
filing date -
Mar 19, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A door movement control apparatus and method are provided for opening and closing door apparatus with a stepper motor supplied control pulses in response to a command signal indicating the desired movement direction. A table of time delays for the respective control pulses and resulting motor steps provides a desired speed pattern for the door movement. A comparison of the number of motor steps taken with the number of control pulses provided is made to determine when a closing door is obstructed.
First Claim
Family
International Classification(s)
Cited Art Landscape
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