I have a craftsman mig welder that stopped welding. the cooling fan works but a switch inside (overload?) clicks inside and kills the fan until it resets. nothing else works on the welder
temp sensor there for a reason so not to fry the thermo protector ....protector being the key wordtemp sensor there for a reason so not to fry the thermo protector ....protector being the key word
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wrong
gasless mig welders are used the same as gas /wire migs
the only difference is the polarity of the leads to the hand piece and the work ground and this is indicated by the plug in the machine for the ground lead
what the "someone " would have been referring to is the duty cycle of the unit
every welder has a duty cycle because of the heat generated in the welding process by the electronic components and transformers and if that duty cycle is exceeded the machine stops working until it cools down or damages the circuits
it is stated as a % of time in use so a unit with a 20% duty cycle means that for every 20% of use it has to cool for 80% of time
as an example ---if you were using a stick welder, the time taken to burn the stick would be 20% and the time taken to insert a new stick and clean the slag off the weld to resume the process would be the 80%
It also depends on the amps being used for the weld
on a machine with 120amps capacity and you were using 15 amps to weld sheet metal--body panels - the length of welding time will be considerable compared to using 115 amps where the weld time would be a few minutes
there are plenty of helpful hints in the operators manual and other technical publications on line
Elmer, If you remove the gun assembly from the machine, if the machine is now not feeding wire, the problem is most likely the gun trigger is faulty. The switch contacts heat up and start sticking over time. If able too disassemble and clean trigger contacts. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." CRAFTSMAN 934 205111 Operator Manual commin problem with wire feed welder Wire won stop feeding
probably over heated and blew the reset button
100 amp welders have a duty cycle ( time in actual welding use ) of less than 20%
that means for welding for five minutes you have to let it cool down for 20 minutes
the lower the amps the longer you can weld for
beware tat the total amperage of the welder does not mean that you can weld for a long time at that amperage
on the plate on the welder is the duty cycle and you have to be aware of it or the machine will shut down
Been welding for a while, open side, check for proper tension on the feed wheel inside side panel, hit the trigger, if feed motor continues to spin tensioner needs tightened or mig wire may be getting hung up inside main cable lead. If motor is off on off on then its probbably the switch on the trigger getting a bad good connection, hope this helps o and check welding tip on gun end, may need replaced if worn or melted, unscrews.
check to see if the cooling fan is working. put a box fan behind the welder so it will blow threw the vents on the rear, or better yet remove the side cover and let the fan blow into the side of the welder.if this works replace the cooling can......GOOD LUCK
Hello, I had a similar problem with a mig welder of my own. There is a temperature sensor on the heat sink. This can be in the form of a temperature switch which when the heat limit is reached, it activates a fan which cools down the heat sink. This is how it operates. Now, my problem was I was welding at a high current and it overheated my welder. I fixed this on my welder by replacing the fan with a higher volume one. The issue here is cooling. If you are welding at a high current, then the welder will overheat as the cooling is designed for average use. I am thinking that your temperature switch is not weak but operating as normal. I would suggest therefore increasing the cooling somehow by getting more air moving over the heat sink. An easy try is to have an external fan blowing over and into the welder case. Overheating is the issue here and if you have to weld at the higher currents or welding continuously for long times, then you have to get the unit cooler inside.
joe
these need a good power supply , i looked and did not see the duty cycle on this welder
if you are doing heavy welding 100% power it will need 30- 40 minutes to cool of to weld again. it all depends on the units duty cycle, stated on the welder spec plate ..can you bypass the auto feed speed mode ? this might be the issue.. good luck ..use all the protection you can when welding these are like the sun and can and will burn exposed skin and eyes .. if'n i was any help throw me a bone and vote thanks jay
1/4" plate with a 135 amp machine is probably beyond it's duty cycle abilites. If you are using a mixed gas, and pushing the max on the settings, it will be cutting out because it is designed to.
You might want to get a higher amperage welder for consistent welding of 1/4"
The 140 Pro maxes out at 5/16" using inner shield wire. and 1/8", or 10 guage with gas.
I have the same problem with my ya219b every year or so. it is the diodes located on the aluminum plate above the transformer. usually they short first and cause the welder to grun and barely weld at all and the they open up and everything works except for welding. when replacing, pay close attention to the polarity of the diodes. there is usually a little schematic symbol printed on it to tell you which is the anode and which is the cathode
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