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Thread: DC Treadmill motor Table saw?

  1. #16
    Quote Originally Posted by Frank Pratt View Post
    The problem with a treadmill motor is that at most it's only going to be 1 - 1 1/4 HP, in spite of what the label on the machine says.
    That still sounds better than the 3/4 horse i have. Not seen nearly as many >1hp ac motors for cheap in my area.

  2. #17
    Quote Originally Posted by Rick Potter View Post
    Art,

    For what it's worth, my 2000 Felder KF700 had variable speed, on both the shaper and the TS. It was nice for me, because the motors they used were 50 cycle, and ran 20% faster than US motors. I often dialed down the speed depending on what I was cutting.
    The Felder's motor actually runs at the same speed as US-made motors as an induction motor's speed depends on line frequency and all induction motors with the same number of poles will run at about the same speed. The difference is that Felder had the sheaves sized for a motor that ran 20% slower than you are currently running it, so you are getting a speed increase due to the sheave ratio diameter being different than if it were designed to be sold in 60 Hz land.

    Quote Originally Posted by Jamie Rickards View Post
    That still sounds better than the 3/4 horse i have. Not seen nearly as many >1hp ac motors for cheap in my area.
    Look at 3 phase motors. If you use one of them, you can also use a VFD to very easily get speed control. Hooking up a VFD to a 3 phase motor is trivial to do. 3 phase motors have the same frame and shaft sizes as single phase motors so one would be a direct bolt in. A treadmill motor will be difficult to adapt into the motor mount and you will also have to get a speed control for it as well as you will be unlikely to be able to use a treadmill PCB to do it and have it work well.

  3. #18
    Join Date
    Mar 2003
    Location
    Upland CA
    Posts
    5,547
    Art,

    No expert here. All I know is what Felder told me, back in '99. My saw was 3 phase with a built in converter that enabled it to run on single phase.

    I got it that way to have VS on the shaper motor, and didn't even know it worked on the saw motor until I got it.
    Rick Potter

    DIY journeyman,
    FWW wannabe.
    AKA Village Idiot.

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