Millermatic 185 Wire Feed Problem

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I have a fairly new MM 185 and the wire feed motor stopped working. I pulled it out and tested it and the motor works fine, so i tested the two leads that plug into the motor and i am getting positive voltage out of both of them, I would think one should be negative. Any help would be much appreciated, im just a kid in high school so i'm trying to avoid bringing it somewhere. thankyou.-Chris
Reply:Check the liner, it may be dirty and stopping the wire from feeding. Quick way to tell is take the tip off and see how much buildup is at the end of the liner.Miller Thunderbolt 225Millermatic 130 XPLincoln HD 100 Forney C-5bt Arc welderPlasma Cutter Gianteach Cut40ACent Machinery Bandsaw Cent Machinery 16Speed Drill PressChicago Electric 130amp tig/90 ArcHobart 190 Mig spoolgun ready
Reply:yea the liner is clean and i can pull the wire inside the cord, so its not stuck in the gun, and the wire didnt weld itself to the tip either,  i think its more of an electrical problem
Reply:Something shorted on the board maybe?MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:It doesn't look shorted but I'm not sure what to look for. I would think if it was shorted I wouldn't get any power to the two leads, but I just get positive voltage for both.
Reply:Put your meter leads in the two wires feeding the motor and trigger the gun. You should get a DC voltage reading that will vary with the wire feed speed control. Approx 4VDC to 24VDC. When you press the gun trigger does the gas flow, or does the weld output turn on.
Reply:

Originally Posted by 79FordF250

I have a fairly new MM 185 and the wire feed motor stopped working.
Reply:yes, both the gas flows and the weld output turn on. and by fairly new i meant it was in good shape
Reply:Does your have the toggle switch inside the machine right above the drive rolls that says spoolgun/wire feeder and is it flipped the right way?...BobBob WrightSalem, Ohio  Birthplace of the Silver & Deming Drillhttp://groups.yahoo.com/group/southbend10k/http://groups.yahoo.com/group/sawking/1999 Miller MM185 w/ Miller 185 Spoolmate spoolgun
Reply:i know that it is an electrical problem because the motor is getting positive voltage out of both leads, so i guess my question is what would cause this, or what is the most likely culprit
Reply:Your motor voltage is a DC voltage that that comes from the motor control board. You should be checking for this DC voltage across the two motor leads (pos. and neg.) not to chassis gnd. The drive motor is a 24 volt DC motor that runs on 4.5 to 24 vdc, to verify you have a good motor you could try disconnecting the motor and hook a 12 volt car battery to it. While you have the motor disconnected check the voltage across the two wires that feed the motor from the board. If no voltage from board, the board is probably bad
Reply:yea, the first thing i did was put 12 volts to the motor and the motor was fine so next i checked for voltage at the two leads that plug into the motor and i got positive voltage out of both of them. So i have no idea what now.
Reply:If you got positive voltage from both the black and red leads, you'd have Zero dc voltage, it that a correct assumption.
Reply:that is correct, but both leads are white, almost all the wires in the thing are white and marked with numbers
Reply:Anyone have any thoughts? Its getting annoying using my buddies welder.
Reply:At this point, may as well take it to an authorized Miller repair center and have them figure it out...MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:Did you ever find out what the problem was with your 185 ?