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  1. #11
    Join Date
    Sep 2005
    Vernon Ct


    I forgot to mention I have a speed controller hooked up also.
    MD Welding & Fabricating L.L.C.

  2. #12
    Join Date
    Feb 2008


    Quote Originally Posted by gearhead View Post
    Why couldn't I just use an electrical reastat (sp) switch on the motor to change the speed.
    Assuming you are talking about an AC motor...

    You can't use a rheostat or autotransformer to slow the motor down because you are only changing the voltage. The frequency determines idle speed and the voltage applied to the motor affects only the torque when operating against the load. If you decrease input voltage enough to slow the motor down, you'll burn it up.

    Now a DC motor is a whole 'nother animal.

    80% of failures are from 20% of causes
    Never compromise your principles today in the name of furthering them in the future.
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