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Control Circuit For Two Stepping MotorsControl circuit operates two independent stepping motors, one at a time. Provides following operating features: After selected motor stepped to chosen position, power turned off to reduce dissipation; Includes two up/down counters that remember at which one of eight steps each motor set. For selected motor, step indicated by illumination of one of eight light-emitting diodes (LED's) in ring; Selected motor advanced one step at time or repeatedly at rate controlled; Motor current - 30 mA at 90 degree positions, 60 mA at 45 degree positions - indicated by high or low intensity of LED that serves as motor-current monitor; Power-on reset feature provides trouble-free starts; To maintain synchronism between control circuit and motors, stepping of counters inhibited when motor power turned off.
Document ID
19900000260
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Ratliff, Roger
(NASA Goddard Space Flight Center, Greenbelt, MD.)
Rehmann, Kenneth
(NASA Goddard Space Flight Center, Greenbelt, MD.)
Backus, Charles
(NASA Goddard Space Flight Center, Greenbelt, MD.)
Date Acquired
August 14, 2013
Publication Date
June 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 6
ISSN: 0145-319X
Subject Category
Electronic Components And Circuits
Report/Patent Number
GSC-13202
Accession Number
90B10260
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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