Is This Possible??

Discussion in 'The Projects Forum' started by rescueweasel, Aug 29, 2014.

  1. rescueweasel

    Thread Starter New Member

    Aug 29, 2014
    I have a small CNC router that uses mach3 and the program turns on and off two switched ac outlets to control the vacuum and the router during cutting.

    I have a small cutting laser which I want to attach to the gantry and use to cut, but it runs off 12 volts. I want to have its power controlled the same way as the router by the machine.

    I hooked up an ac to dc converter and it powers the laser fine but the problem is that there is a lag coming on and the power tapers off when shut down. I need instant on and off of the 12 volts.

    Is there such thing as a relay that I can have 12v in and out but have a 120v ac trigger? Or is there something better I could use.? The laser draws about 2.5 amps at 12 volts.

    Thanks for the help.
  2. Experimentonomen


    Feb 16, 2011
    The lasers power supply should have a enable/disable input, assuming its a commercially built thing made for like a laser cutter.
  3. BeerBelly

    New Member

    Dec 16, 2013
  4. rescueweasel

    Thread Starter New Member

    Aug 29, 2014
    Thanks for the info. This is not a commercial built product. I have been slowly making everything learning as I go. Here is a picture

    Not sure I understand which relay to get and how to hook it up but at least I have some direction now
  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    You need a 120VAC coil relay to switch the 12VDC output from the AC-DC converter to the laser. The input to the AC-DC converter stays on.
    Like the one BeerBelly linked to.