Lincoln weld pack 100

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I have a lincoln Weld Pack 100. Today I was welding 1/8" 1x1 tubing and was getting to much wire feed, so I turned it down to D-2 which has worked the best before for this type of tubing, when it stopped feeding and welding.  The machine is still running but with no feed or weld.  Does anyone know what happened?
Reply:Drive motor may have given up the ghostCould be a loose wire in the gun, thus not sending the signal to the driver motor.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:I think those little cheapy guns are pretty bad, mine was temperamental to say the least. Try messing with the trigger until something happens. Good luck...[Account Abandoned 8/8/16 Please Do Not Attempt Contact Or Expect A Reply]. See you on YouTube! -ChuckE2009
Reply:How are you at electrical troubleshooting?  Could be a number of causes including the two already mentioned (trigger circuit and drive motor).But some of the most common are:Tripped temperature overheat switch (exceeding duty cycle)Failed motor control boardFailed diode(s) in weld output rectifier (where motor drive voltage comes from)Failed secondary winding in cooling fan / control transformer OR loose wires at same (where control voltage comes from)Do you have the unit manual and wiring diagram to follow?  Unit code#?MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!