Wire burning betwen rool and feed drive

Hi:

In order to check the wire speed control you will need to open the machine and test the wire speed control mechanism (rehostat, potentiometer) with the use a volt meter. If you see a a variation on it while moving the knob then your problem is the PC board.

Good luck and have a great day.

Newer welders as hobart and miller are set up from factory to use innershield wire therefore polarity is set up as inverse. Check inside your machine and check that ground cable is on negative side. Your gas must be mix argon/CO2 or pure CO2 (not recommended).
Other potential problem is wire not being a mild steel one. Check you have gas flow out of your nozzle.
That's all I can think of.

Sounds like the restate that controls the wire speed is gone. Replace it.

Check the two main diodes. These units have a light duty cycle. About 20% if I remember correctly. I have one that I was welding with for a considerable amount of time, and burned up the diodes. You can test them by disconnecting the wires (with unit disconnected) and use a ohm meter. You should get a reading in one direction, but not the other. If no reading, then the diode is blown. You can order new ones from your local welding shop. Also check all conections on the secondary for any signs of overheating and loose connections.

Locate your locale Hobart welding distributer, or contact hobart, the are nice people and will give you all the avice you need.

You will have to adjust the tension at the feed wheels, also make sure the spool is not too tight, I had the same trouble with the 180 model, just a bit of fine adjustment

If it is new i would not play around with the welder Just take it back to where you bought it get them to replace it under warranty

check main contactor or diode bank.

does it have a reset button? if so it has gone bad, if not there is a fuse or something inside. they protect that circuit against shorting at the working end of the gun. happens ALL the time.
Hawk

A schematic would certainly help, give Hobart a call and ask for a wiring diagram. or manual. Hobart are very helpful and may even give you guidance, you may have to pay the postage, they usually fax these documents so it will not cost you anything.