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Thread: Harbor Freight spool gun - Miller Shop Master connection

  1. #1
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    Harbor Freight spool gun - Miller Shop Master connection

    Not sure if it is possible....... I would like to use my friends HF spool gun, but not sure on how to make it work with my Miller Shop Master power unit.

    Any help would be appreciated.

    Thanks,

    NT

    Lincoln Tig 300
    Miller Dial Arc HF
    Hobart Mig
    Lincoln LN 25
    Atlas lathe
    And a lotta other stuff

  2. #2
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    Re: Harbor Freight spool gun - Miller Shop Master connection

    If post the Wiring-Diagram i can help.
    Most spool guns work on 24 volts .
    But I need to look at schematic.

    Dave

    Quote Originally Posted by nordictom View Post
    Not sure if it is possible....... I would like to use my friends HF spool gun, but not sure on how to make it work with my Miller Shop Master power unit.

    Any help would be appreciated.

    Thanks,

    NT

  3. #3
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    Mar 2010
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    Ceres, California
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    Re: Harbor Freight spool gun - Miller Shop Master connection

    Trying to use the Vulcan or titanium model?
    Just a quick look of harbor freights web site, the titanium appears to be set up for harbor freight machines only. The Vulcan looks like it might work on small Lincolns and Miller's if it comes with two different power pins.
    To use the Vulcan on the SHOPMASTER you will need to modify the feeder.
    You will need use of the wire drive motor pcb. You add a switch between the feeder drive motor and will need to add two sockets to the feeder trigger plug for the motor.
    Switch sends motor power there. You also will need a Miller power pin so it can pick up gas and weld power from the feeder. You can call Harbor Freight tech support and ask them if they have a way to connect the spoolgun to the feeder you have with the shopmaster. Go to harbor freight.com and look up the spool gun at the bottom of the page is the phone number.

  4. #4
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    Re: Harbor Freight spool gun - Miller Shop Master connection

    Yes it can be done.
    I do not data to tell where the wires go.
    The photo is from Harbor Frieght it shows a little data https://www.harborfreight.com/omnipro-220-industrial-multiprocess-welder-with-120240-volt-input-63621.html

    Dave
    Attached Images Attached Images  
    Last edited by smithdoor; 06-23-2021 at 02:48 PM.

  5. #5
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    Re: Harbor Freight spool gun - Miller Shop Master connection

    Quote Originally Posted by smithdoor View Post
    Yes it can be done.
    I do not data to tell where the wires go.
    The photo is from Harbor Frieght it shows a little data https://www.harborfreight.com/omnipr...put-63621.html

    Dave
    The schematic for the OmniPro™ 220 iIndustrial multi process Welder but doesn't tell you anything of use for it or for the Harbor freight spool gun especially. No pin outs for anything that I can see. ???


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