help millermatic 35

[marty68]

hello gents. i have a miller 35 old machine not "white face" i bought it used 15 years ago i use it very little. at one time it was feeding wire sporaticly. feed motor seemed to have a "dead spot" it would feed then quit then feed then quit. i took motor out looked at it put it back i took guns in had new liners installed bought new rollers for drive unit. it worked beautifully for a while. then it started "sometimes not feeding wire" any ideas? is it junk is the drive motor rebuildable? repairable fixable? here is a pic of the machine. thanks in advance

 

[Lx460]

Have you tried adjusting the wire tension at all? Is your roller size the same as the wire you are using?

 

[Lx460]

Also, here is a .pdf of the owners manual with a troubleshooting section. I don't think the drive motor is rebuild able but it's replaceable.

http://www.millerwelds.com/om/o1301d_mil.pdf

 

[Cope]

Miller has great customer service. Give them a call, and they will walk you through troubleshooting.

 

[marty68]

there is no tension on rollers right now. and the drive motor does not spin. i put it on clist. for 275. maybe i shold retract ad. getting lots of interest. and do more research to fix it. last time i had trouble with it i was told drive motor wasn't available.

 

[Petey156]

Check the plug where the trigger plugs into the unit

 

[marty68]

i checked for voltage at drive motor. none. spun rheostate no change. i need to trace where i am losing it. i feed 12v to drive motor it spins like crazy. whoo hoo deleting craigslist ad. i can fix this thing

 

[marty68]

update. at the rectifier on the right i have 7.36 vdc. the left rectifier. (picture is upside down) which has no dc out.(why rectify if you arent using the dc?.?) i have 34 vdc. if i pull the trigger i get a 7 vdc surge momentarily on the feed to the motor. after the bigger resistor (10 ohm.) my meter does not have the ability to test a capacitor. so i swapped the electrolytic capacitors on the rectifier. no change. where should i look from here? my machine has a second "ice cube" relay that does not change states. and is not on the diagram provided. again any help is appreciated

 

[marty68]

in case anyone is following, thanks to Lx460. and his pdf of wiring diagram. i went through all the wiring and testing all the devices. i determined that a 1.5 ohm variable resistor should not go from 1.2 ohm to k ohms to meg ohms. i then spun dial back and forth several times cleaning the "coil" and "wiper" this made the variable resistor vary from 1.0 ohm to 1.5 ohm just as the book said it should. so i then hooked it all back together and ran it. it is no longer for sale. i shall keep it.

 

[slip knot]

My Hobart had a similiar problem. Hobart actaully had a repair for it and even sold the parts. i had to do some soldering on the control board but the machine feeds wire without a hitch now.

Go to the Miller website and see if they have a forum section. Thats how I found what was ailing my HH.

 

[Lx460]

Awesome!

 

[Richard Cranium]

what is the difference between the white face and the black face? Asked the man who has a white faced mm35. Rich

 

[binder man]

Gas valve..and gun/gas block..white face have to have an adapter to run the m25 style gun, black does not