Power MIG 255C Wont Weld

Tue, 31 Aug 2021 09:05:36 GMT

go to see Welding Machine for Power MIG 255C Wont Weld

Turned off my 255C evening before last was welding fine, went out yesterday and no soap. Getting power, wire feeding fine, but wont weld. Checked input on back of machine all ok. Any ideas on what to check would be appreciatedGeezerPower Mig 255C185 TIGBlue 175 MIGRanger 8 Kohler 20HP1974 5K Lincoln/Wisconsin Powered (Cherry)Victor/Harris O/AK 487 Spool Gun
Reply:I would check the work clamp (aka ground) first. I would probably change the contact tip second, and if none of that works, break out the multimeter and see if there is voltage present where the power lead connects to the gun when you press the trigger. After that I would open up the gun and check the trigger switchMiller Multimatic 255
Reply:Originally Posted by Louie1961I would check the work clamp (aka ground) first. I would probably change the contact tip second, and if none of that works, break out the multimeter and see if there is voltage present where the power lead connects to the gun when you press the trigger. After that I would open up the gun and check the trigger switch
Reply:Boy am I confused. Rechecked ground clamp. Good continuity from machine connection to clamp.Dismantled gun, took switch out and checked continuity. No problem.One lead to ground other to tip when switch depressed voltage, bout 28 vdc.Put work clamp on piece of scrap, welded fine.My guess is I have an intermittent switch. You agree????appreciate the reply and post, again, nice bassGeezerPower Mig 255C185 TIGBlue 175 MIGRanger 8 Kohler 20HP1974 5K Lincoln/Wisconsin Powered (Cherry)Victor/Harris O/AK 487 Spool Gun
Reply:sure sounds like it. 28 volts seems right. You didn't hit the thermal overload yesterday by any chance did you? Maybe that was stuck. Yeah, nice bass. Caught him in Long Island sound in what is called "the race", an area of narrows between the north fork of Long Island and Fishers Island. I was drifting live eels on the bottom. He was a 40 incher, weighed about 25 lbs IIRC. Biggest I have ever caught, but really a medium sized fish around here. The big ones around here go 50+ inches and 40+ lbs.Miller Multimatic 255
Reply:don't believe I hit thermal overload but have had allot of birthdays so it is possible.Thanks again for taking the time to respondGeezerPower Mig 255C185 TIGBlue 175 MIGRanger 8 Kohler 20HP1974 5K Lincoln/Wisconsin Powered (Cherry)Victor/Harris O/AK 487 Spool Gun
Reply:If your gun has the open trigger switch. Contacts can get dirty and will work intermittently until cleaned or switch is replaced.
Reply:Originally Posted by ccawgcIf your gun has the open trigger switch. Contacts can get dirty and will work intermittently until cleaned or switch is replaced.