Optical counting motor shaft positioner
AssigneeHoneywell Inc.
InventorsFred C. Selkey, Louis S. Smulkstys
Life of this patent
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Abstract
A system for positioning the output shaft of a motor is disclosed having a set of terminals for receiving a predetermined count representing a desired position for the output shaft, a counter having first and second inputs, the first input being connected to the set of terminals, a count generator associated with the output shaft and connected to the second input of the counter for supplying to the counter counts dependent upon the rotation of the output shaft, and a switch connected to the motor and to the counter for energizing the motor when the counter receives a predetermined count representing the new desired position and for de-energizing the motor when the count generator supplies a number of counts equal to the predetermined counts.
Claims18
A system for positioning the output shaft of a motor comprising:
- terminal means for receiving a predetermined count representing a desired position for said output shaft;
- counting means having a first input connected to said terminal means for receiving said predetermined count, a second input for receiving a count enable signal, and third input means;
- count generating means including an optically encoded disc to be driven by said output shaft, said optically encoded disc having a reset window and a plurality of count windows, said count generating means further comprising a light source on one side of said disc and first and second photosensors on the other side of said disc, said first photosensor being operated by said reset window once per revolution of said shaft for supplying said count enable pulse to said second input of said counting means to allow said counting means to count and said second photosensor being operated by said count windows for supplying counts to said third input means of said counting means dependent upon the rotation of said output shaft;
- and,
- switch means connected to said motor and to said counting means for energizing said motor when said counting means receives a predetermined count representing a new desired position and for de-energizing said motor when said counts supplied by said second photosensor to said third input means matches said predetermined count.
A system for positioning the output shaft of a motor comprising:
- terminal means for receiving a predetermined count representing a desired position for said output shaft;
- down counting means having first and second inputs, said first input being connected to said terminal means so that said predetermined count can be loaded into said down counting;
- parallel enable means for loading in said predetermined count into said down counting means and for initiating energization of said motor means;
- count generating means associated with said output shaft and connected to said second input of said down counting means for supplying said down counting means with counts dependent upon the rotation of said output shaft and for supplying a count enable pulse to said down counting means for allowing said down counting means to begin down counting said counts;
- and,
- switch means connected to said motor, to said down counting means and to said parallel enable means for energizing said motor when said motor is to be driven to a new position and for de-energizing said motor when said counts supplied by said count generating means to said second input matches said predetermined count.
Dependencies are inferred from the claim text.