The wire is slipping on the wheels and not feeding to the gun
check the tension on the spool - is it free to rotate ( but not so free it over-runs when you release the trigger)
check the tension on the drive wheels - are they turning and slipping on the wire?
Do you have the correct drive wheels for the wire size? if you're using .8 wire, you need to be using .8 drive wheels (or the .8 grooves if you have multiple grooves.
is there a kink in the liner? pull out the liner (remove the whole gun attachment, usually the liner will slide out from the end where it attaches to the welder). Blow out the liner with an airgun while you're at it as they fill up with crud.
When you reassemble the gun, slide a lenght of wire up the cord and check that you can push it all the way in freely.
Then when you rig the welder, leave the tensioner off the drive rollers, and push the wire into the gun by hand. you'll feel if there are any tight spots ( usually caused by kinks in the liner).
once you've rigged it, clamp the drive rollers shut and adjust the tension until they feed the wire smoothly. (leave the contact tip off the gun when you rig it as the tolerances are so fine that even the small flattening of the wire where you cut it will usually prevent it from feeding into the tip. Once it feeds properly, reshape the cut end of the wire and attach the tip (don't force it over the wire or you' ll just damage it)
Jul 13, 2012 |