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  1. #1
    Join Date
    Dec 2010
    Posts
    313

    Exclamation CNC Lathe Construction question

    Hi,
    I posted earlier look for a solution to a chuck, it isn't quite solved yet but thats alright. I am now on a different problem/ question.

    I have this contactor what is a cnc contactor and I am wondering how I use it to control the spindal motor. I am using steppers to move the tail stock and the tooling. The spindal is a DC motor out of a blower and it would be very cool if I could use this contactor some how to control the motor.
    Is it something I can use with pokeys or phidgets?

    Thanks for any help.

    Rob from what is a cnc

    My contactor is found at what is a cnc contactor and there is a link on the page to one for sale on the page.

  2. #2
    Join Date
    Dec 2003
    Posts
    24220
    The contactor you show is primarily used for 3ph AC control, DC requires some special arc shields and contacts, normally you control the spindle motor through a controller of some kind? or are you operating this motor full on?
    Do you need reversing feature?
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  3. #3
    Join Date
    Mar 2011
    Posts
    584
    I use a contactor (same brand) in my powder coating oven 220v 1phase and its really loud! I think you would burn it out trying to control a motor or drive you nuts before it burned out. At minimum get a SSR with a heat sink.

    Maybe use that in conjunction with the Super PID and have it trigger the SSR...

    keep the contactor to be your main power switch to the machine

  4. #4
    Join Date
    Dec 2003
    Posts
    24220
    Quote Originally Posted by vtx1029 View Post
    Maybe use that in conjunction with the Super PID and have it trigger the SSR...
    The OP mentions a DC spindle, the PID is for a universal motor.
    It all depends on the nature of the spindle control?
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  5. #5
    Join Date
    Mar 2011
    Posts
    584
    Quote Originally Posted by Al_The_Man View Post
    The OP mentions a DC spindle, the PID is for a universal motor.
    It all depends on the nature of the spindle control?
    Al.
    oops I miss that.

  6. #6
    Join Date
    Dec 2010
    Posts
    313
    Hi,
    Thanks for all your help.
    I suppose I am better off just leaving things the way they are for now, I don't need to control the spindal and if I do I will just change the motor to a stepper.
    I just figured I could use the contact block for something, it has been sitting around for a while now.
    Al what do you mean by a "universal motor"?

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