Question about Miller Welding Tools
I run a university welding shop and found a bird's nest, near the rollers, that had changed color but not burnt out or melted . now the millermatic 251 is no longer driving wire. the drive wheels are not moving. and thus no wire coming out. electrics are working and running relays, gas control is working fine. not really sure where the problem is. could the motor be burned out? i am really not sure what the problem is, and would appreciate any help.
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Posted on Jan 02, 2017
SOURCE: millermatic 200 won't weld
first check on the plate that tells imfo of unit ,there is what is called duty cycle.If the duty cycle says per say 30%,that means you can weld full power for 3 minuets before unit will shut down to cool.if it says 100% duty cycle there is no limit on weld time.this is the first thing to understand,if that is not the case check the main contactor where the power imput wires go,pull the gun trigger see if the contactor is pulling in , it should if not no welding amperage.
Posted on Jul 12, 2009
SOURCE: wire doesn't feed
Either the trigger mechanism in the gun is bad, the servo that turns the feed wheel is bad, or you have too much tension on the adjustable tensioner knob. Take the wire out of the feed wheel, plug unit in and see if you can get the wheel to turn. If not, it is the trigger or the servo. If it turns, the tensioner was too tight.
Posted on Jul 25, 2009
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The problem with my MIG 175 Pro is the
"voltage selector switch" (part # M15750-1). I took it apart and
saw all of the contact points where corroded. I can hold the knob between
two settings and the machine will work.
I have the same issue only after about a year of very light use. I am not sure how to prevent this from happening again.
Posted on Sep 04, 2009
Flux core wires will run on reverse polarity (gorund +), for solid core wires you need straight polarity (ground clamp at negative ). That will take care of the problem.
Posted on Jan 04, 2011
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