Bill Harrison
New Member
- Messages
- 27
- Location
- England North Yorkshire
Hi all Bill Harrison here, I have a problem and am hoping someone from the collective may be able to help me.
I have looked at the forum section but cant figure how to post a new thread and this is the only location that offers me the choice, so if not allowed please will admin point me in the right direction and forgive my indiscretion.
I have a Newarc RM2500 Mig/MMA set that is acting up.
When I pull the trigger the wire emerges but when it touches the job the wire doesnt transfer into a molten poool and deposit onto the job but it instead heats up and starts to glow red and you can see the heat going back to the torch until it touches the tip at which time it sticks to the tip and stops the wire from feeding.
At first I thought it was a bad earth or too much drag on the wire feed reel but I am pretty sure those are not the problem. I have swapped torches and get the same problem.
I have spoken too the techs at Newearc and they said it sounded like the Burn Back variable resistor needed tweeking but I have done this to no avail.
I have spent a full day tweeking and checking, moving the trim pots on the circuit board (but putting them back where they were if nothing changed) and although I can make things worse, I cant get an improvement. Sometime I can get a strike and initiate an arc if I run a very long stickout but when I try to get back to a normal length then the red hot wire gets closer to the tip until it sticks to it . Upping the wire feed roller tension just causes ti to birdsnest at the feed rollers.
Can ANYONE help?
I have looked at the forum section but cant figure how to post a new thread and this is the only location that offers me the choice, so if not allowed please will admin point me in the right direction and forgive my indiscretion.
I have a Newarc RM2500 Mig/MMA set that is acting up.
When I pull the trigger the wire emerges but when it touches the job the wire doesnt transfer into a molten poool and deposit onto the job but it instead heats up and starts to glow red and you can see the heat going back to the torch until it touches the tip at which time it sticks to the tip and stops the wire from feeding.
At first I thought it was a bad earth or too much drag on the wire feed reel but I am pretty sure those are not the problem. I have swapped torches and get the same problem.
I have spoken too the techs at Newearc and they said it sounded like the Burn Back variable resistor needed tweeking but I have done this to no avail.
I have spent a full day tweeking and checking, moving the trim pots on the circuit board (but putting them back where they were if nothing changed) and although I can make things worse, I cant get an improvement. Sometime I can get a strike and initiate an arc if I run a very long stickout but when I try to get back to a normal length then the red hot wire gets closer to the tip until it sticks to it . Upping the wire feed roller tension just causes ti to birdsnest at the feed rollers.
Can ANYONE help?