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IndustryArena Forum > CNC Electronics > CNC Machine Related Electronics > Magnetic starter | contactor to start and stop cnc
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  1. #1
    Join Date
    Jul 2014
    Posts
    39

    Magnetic starter | contactor to start and stop cnc

    Hi all

    I`m getting ready to rework my control panel. I`m looking to start and stop the machine with
    a magnetic starter. I`m looking for sources and the necessary specifications to start and stop
    a 115 Ac line at 15 amps. I basically know little regarding magnetic starters.

    Thanks

  2. #2
    Join Date
    Dec 2003
    Posts
    24221

    Re: Magnetic starter | contactor to start and stop cnc

    Here all is revealed, you can get starters/contactors like telemecanique with add on O/L's that fit to the bottom of the starter.

    http://static.schneider-electric.us/...0140CT9201.pdf
    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
    Jul 2014
    Posts
    39

    Re: Magnetic starter | contactor to start and stop cnc

    Hi
    I just received my 3 pole 115 volt contactor from Automation Direct. I found some videos online.
    I used the videos to create a wiring diagram. I`m hoping someone could check my diagram.
    Attachment 251916

  4. #4
    Join Date
    Oct 2006
    Posts
    323

    Re: Magnetic starter | contactor to start and stop cnc

    Poorly illustrated as far as clarity, but looks good as far as functionality.

    Your NO push button switch should pull the coil in and close 83-NO-84, and your NC push button (PB) switch is closed and latches or holds the coil keeping 83-NO-84 closed, until NC PB pushed to open the circuit, unlatching or releasing the coil and 83-NO-84 returns open.

    To help reduce EMI noise in your cabinet you may consider a flyback diode or other RC Snubber circuit for your coil.

  5. #5
    Join Date
    Dec 2003
    Posts
    24221

    Re: Magnetic starter | contactor to start and stop cnc

    Quote Originally Posted by Novett View Post
    Hi
    I just received my 3 pole 115 volt contactor from Automation Direct. I found some videos online.
    I used the videos to create a wiring diagram. I`m hoping someone could check my diagram.
    The link I posted had it on p4 among others.
    True about the RC snubber across the coil if AC, you can only use a rectifier if the coil is DC.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

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

  6. #6
    Join Date
    Oct 2006
    Posts
    323

    Re: Magnetic starter | contactor to start and stop cnc

    Wow! That is an excellent reference doc. Very clear diagrams.

    All IS now revealed. Saving that one to my library.

    Al, can you put the rabbit back into the hat?

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