PC joystick to (Servo or Stepper) STEP/DIRECTION


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  1. #17
    Join Date
    Feb 2008
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    Michigan, USA
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    Default Math thoughts

    So here is the path that my mind is headed down:

    Pulley Circumference 2.375"
    Rev/Sec 4.21
    Travel/Sec 10"
    Pulse/sec 6063
    Counts/bit A-D 12.126
    Freq of pulses 165 uS

    My conclusion so far is:
    You have a control range of 500 A/D counts on each side (plus/minus)
    for every bit of A/D change, you increment your pulses sent out by 12.126 @ full speed
    you have to be able to send a pulse every 165 uS to get full speed
    encoder counts of 1440/rev give you a movement of 0.00165" per count

    So, as long as I can read the A/D's, adjust the gain, check limits, and send out 2 pulse trains in under that time, I should be able to make it work.

    Anybody see any holes?

    Bo
    Last edited by boroko; - 30th October 2010 at 22:27.

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