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  1. #11
    Join Date
    Sep 2005
    Location
    Vernon Ct
    Posts
    118

    Default

    I forgot to mention I have a speed controller hooked up also.
    Mike
    MD Welding & Fabricating L.L.C.
    mdwelding@sbcglobal.net

  2. #12
    Join Date
    Feb 2008
    Posts
    865

    Default

    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.
    "All I ever wanted was an honest week's pay for an honest day's work." -Sgt. Bilko
    "We are generally better persuaded by reasons we discover ourselves than by those given to us by others." -Pascal
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