Motor-control scheme yields four positions with two outputs

December 01, 2012

Bernard Cole-December 01, 2012

In “Motor-control scheme yields four positions with two outputs,” Jean-Bernard Guiot, DCS AG, Allschwil, Switzerland shows how to position a mechanical device into four discrete positions but with only two free outputs and one free input from the control system.

The position depends on a set of cams and four corresponding limit switches. Whether the motor is rotating or stopped, the use of a polymer-based resettable fuse, protects the motor and the circuit against overcurrent conditions, such as a stalled motor.

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