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  1. After messaging Tech support they kindly sent me...

    After messaging Tech support they kindly sent me a pinout diagram for the spool gun. I did some testing with a meter and the spool gun wire feed speed is controlled by the MTS221 by varying the...
  2. No one has a pinout diagram for the MTS 221 they...

    No one has a pinout diagram for the MTS 221 they will share?
  3. PowerMTS 221 STI Adapt Snap On MHG5-B spool gun?

    I picked up a very nice used Snap On MHG5-B this past week and was thinking of making my old Lincoln mig welder that I have had for 25 years a dedicated spool gun machine. I have sense rethought...
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    PowerMTS 221sti Spool gun (Miller A30?)

    I purchased a new 221STI first of the year and I am sad to say I have not even completely unboxed it yet. I have an upcoming project where I will be welding a good bit of aluminum and I was looking...
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