Position reading with stepper motor

Discussion in 'General Electronics Chat' started by mlaymance, Nov 23, 2008.

  1. mlaymance

    Thread Starter New Member

    Nov 22, 2008
    7
    0
    A friend of mine said that he had at one time used a stepper motor and a couple of IC's to provide a digital output of shaft position.

    Is there anyone out there that is familiar with this circuit and components?

    Thanks,
    Michael
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    He was probably using a stepper as a generator (alternator), tied into a comparator and a counter to count the pulses.

    Not a very reliable way to do it, as if the shaft were rotated very slowly, the pulse generated may be too low of an amplitude to be detected. Also, a stepper used as a sensor would add considerable inertia and drag to the shaft.

    Better to use a rotary encoder.
     
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