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Motor position control using DSP

Discussion in 'General Electronics' started by gyang, Jul 13, 2004.

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  1. gyang

    gyang Guest

    I'm having problems in using my DSP (microcontroller - motorola
    MC68HC908KX8) to control the rotary position of the motor. Especially
    the 'control of motor rotation'.

    This particular design is part of my 3rd year project and hence the
    cost of my components are limited. In other words I can only implement
    simple and low cost designs (for example I've seen some guys using
    LM628 from national semiconductors to do the job - but it's too
    expensive and I don't need such high precision for my model).

    Basically I need :
    1.) my DSP to stimulate the motor
    2.) Allow the motor to rotate 30 degrees clockwise or anti-clockwise
    per step/stimulation.

    ques: I don't know if it is necessary to use feedback for controlling
    the rotation of my motor?
    suggestion: What I have in mind is using PWM to control the rotation
    of my motor. Will this work properly or otherwise is it the best

    Would someone please give me some advice as to How I can use my DSP to
    control the rotation of my motor. It would be greatly appreciated!!!

    Thank You
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