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Speed control

Discussion in 'Electronic Basics' started by Stumpy, May 28, 2006.

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  1. Stumpy

    Stumpy Guest

  2. Christopher

    Christopher Guest

    Hello Stumpy,


    It won't get you where you want to go!


    "I don't need much power" Then why are you starting off with 1/3 hp.

    Possible disengage the motor and use the lathe as a winding jig form
    holder with a crank handle mounted on the end.

    For "home-brew", modified BBQ motor or Can Opener motors with a foot
    pedal switch works ok. I have wound many coils and prefer to use my
    own hand turned crank wheel, no motor, for the "best control". Hold
    the wire with a rubber glove or washed hands for traction.

    Good Luck,

    * * *
    Christopher

    Temecula CA.USA
    http://www.oldtemecula.com
     
  3. Stumpy

    Stumpy Guest


    The BBQ motor and can opener sound like a better speed. I guess a simple
    on/off foot switch would work. I want 2 hands for the wire, so hand crank
    is not ideal.

    If I could put a ratchet on a pole lathe so it only goes one direction, that
    would work too.

    http://www.historicgames.com/lathes/springpole.html

    I hate it when making the tools takes longer than the project itself.

    How would I couple a can opener motor to the chuck? I've never opened one
    up yet.
     
  4. Chris

    Chris Guest

    H, Stumpy. Actually, the manual states the speed range is 750 to 3200
    RPM.

    You've already got a DC PM motor, and a DC speed control. Putting a
    variac in will probably smoke the speed control. I'm sure it will
    actually go slower than 750RPM, particularly if there's an adjsutment
    to the minimum speed setting on the DC drive. The problem is, the
    motor will probably go cogging at lower RPMs, and will not provide you
    with sufficient torque. Your piece part will suffer as a result.

    If I were in your shoes, and I was interested in getting a lower speed
    out of this lathe, I'd look at part #31, the drive pulley. You might
    want to ask the manufacturer if they've got one with a wider diameter,
    which would give you a lower speed range. Depending on the adjustment
    range, you might have to specify another drive belt (part #32), too.

    Don't ignore the possibility of making or modifying a pulley here.

    Good luck
    Chris
     
  5. Stumpy

    Stumpy Guest

    Never mind. While diddling around in the garage trying to attach a chuck to
    a 12v pencil sharpener. I slowly realized that I had a prebuilt system
    already there. I put a variable speed drill in a bench vice, looped a cord
    over a piece of PVC and tied it to a closed end wrench 2" off the floor. Put
    a 1/4" rod in the chuck and wrapped ~100' of 26 gauge wire on in a couple of
    minutes.

    I like it when I don't have to spend any money or wait on parts.
     
  6. John Fields

    John Fields Guest

  7. John Fields

    John Fields Guest

    ---
    Oops...

    Missed your earlier post.
     
  8. Stumpy

    Stumpy Guest

    Now you tell me. I'm going to end up doing my own thinking.
     
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