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replacing control panel on Treadmill with potentiometer

Discussion in 'Power Electronics' started by jeff kopp, Sep 25, 2020.

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  1. jeff kopp

    jeff kopp

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    Sep 25, 2020
    [​IMG] [​IMG] Trying to use the DC motor and power board on a treadmill for a sander build. The control panel has a 12 pin connector between it and the power board. Would like to eliminate the control panel with a simple 5k potentiometer.
     
  2. davenn

    davenn Moderator

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    Sep 5, 2009

    Not going to happen

    The pot will not handle even a tiny fraction of the current needed for the motor to operate
    that's why there are controllers for such situations
     
  3. Minder

    Minder

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    Apr 24, 2015
    What is the model of the motor board, I designed some for the MC2100 series that require a 20Hz PWM control signal.
    These use a pot and a start & stop P.B.
    This is when using the motor controller in a stand-alone installation, drill press, sander etc.
    M.
     
  4. Minder

    Minder

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    Apr 24, 2015
    I assume the OP is asking if he can substitute the control console with a 5k pot into the motor control board.
    That is the way I read it anyway.;)
    M.
     
  5. Alec_t

    Alec_t

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    Jul 7, 2015
    How many wires go from the control panel to the power board? Any more than 3 and you'll need more than a pot for controlling the motor. Even with just 3 there's no guarantee a pot would suffice.
     
  6. davenn

    davenn Moderator

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    Sep 5, 2009
    regardless of the number of wires, a pot on it's own isn't going to handle the voltage and current
     
  7. Minder

    Minder

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    Apr 24, 2015
    Like I said the MC2100 and some others will not do it with a pot, it requires a PWM signal, this was sent down from the console in normal operation.
    The older MC-60 had a 5k-10k pot that would do it. This was a SCR bridge controller.
    So far the OP's board is unknown.
    M.
     
  8. Alec_t

    Alec_t

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    Jul 7, 2015
    Totally agree, but we don't know what is on the 'power board'.
     
  9. Minder

    Minder

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    Apr 24, 2015
    I think there is a little confusion as to what exactly the pot refers to, the OP did say 'replace the control panel',
    Which to infers that he wants to use the motor board as a stand-alone unit.
    Not use a pot to directly control the motor.
    M.
     
  10. dave9

    dave9

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    Mar 5, 2017
    Since you did not give us enough info to see a solution, it is not possible, yet.
     
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