Welder won't feed on c or d settings
If this is an old machine the reason it's not welding on C or D set is because the voltage control rheostat it's worn out or just dirty. Open your machine and take the rheostat out (also know as petentiometer) and inspect it for carbon build up along the spring try to clean it with a stainless steel toothbrush if problem persist then just buy another control.
SOURCE: Lincoln 135 PRO MIG Welder feed stops after a few minutes
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.
SOURCE: My lincoln 180 mig welder sounds like the
The wheel does not spin because its not making contact with the wire.
Try adjusting the tension screw.
SOURCE: lincoln mig welder
Check the earth clamp, make sure all the cables or in good condition and secured, if the unit is three phase, get an electrition the ensure all the phased are functioning. test the fuses with a meter, get back to me if all is OK
SOURCE: I have a Lincoln pro core 100 when I pull the
content.lincolnelectric.com/pdfs/products/navigator/im/IM781.pdf
manual above.
Often this is caused by the Motor Driver, Electronics failing, you need to troubleshoot the PCB, Motor Drive circuit.
This is generally where you find the problem. Of course check ALL connections etc First too. Also Check out your switch too, sometimes they fail.
Wire feed stoppages and wire feed system malfunctions can adversely affect the welding arc and create irregularities that may weaken the weld bead. Birdnesting, a tangle of wire that halts the wire from being fed, is a common problem. You can resolve birdnesting by flipping up the drive roll and pulling the wire back out of the gun. Next, trim the affected wire and re-thread it through the feeder and back to the gun. If the welding specifications allow, decrease the drive roll tension, use a larger diameter wire and/or reduce the distance the wire feeds (use shorter cables) to minimize the chance of birdnesting.
Burnback is also very common. It results when a weld forms in the contact tip, and usually occurs because of too slow of wire feed speeds and/or from holding the MIG gun too close to the base metal during welding. To correct burnback, increase the wire feed speed and lengthen the distance of the MIG gun from the workpiece (the nozzle should be no further than one-half inch from the metal). Replace burnback-damaged contact tips by removing the nozzle and the contact tip (which may be melted to the wire), snipping the wire, installing the new contact tip and replacing the nozzle with one that has the appropriate tip recess for the application.
Other causes of wire feeding problems include liner blockages, improperly trimmed liners (too short/burred/pinched) or the wrong size liner. To remedy these problems, replace any liner if you find a blockage, always trim the liner according to the manufacturer’s direction and be certain you are using the correct size liner for the welding wire diameter.
troubleshooting how to, fix the PCB if you need to.
http://weldingweb.com/showthread.php?s=a8f5deacd13615dae178740c72f32f93&t=4385
Lincoln Support website below, please go here and obtain your Service and repair manual, one simply cannot troubleshoot without one, it just makes it a lot easier with one too.
http://www.lincolnelectric.com/
Online help below.
http://www.lincolnelectric.com/knowledge/askus/default.asp
SOURCE: SMALL PUDDLES NO PENATRATION
Hi:
If you are using flux core wire you need to switch the polarity of the machine. With flux core wire, your ground clamp becomes positive (lead) and your gun the ground. All you need to do is switch the cables above the feed rolls.
That will take care of the problem
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