Mig wire burning back at end of weld

[scottmk1]

I've been doing some welding on the chassis of my truck today and found that most of the time when I finish a run the wire has burnt back and got stuck to the tip. I've increased the wire feed a touch and it does seem a bit better, but still a pain in the hoop.

I'm reluctant to increase the wire feed any more as I think it would then be too much. So aside from playing with the voltage and wire feed settings is there anything else that can help with this?

Welder is a Migatronic 231 and doesn't have much in the way of settings, voltage, wire feed and a dial for Argon/CO2

 

[8ob]

Is the contactor staying in/stuck ? You could check the voltage at the tip.

Bob

 

[123hotchef]

how does it weld now u have increased the wire speed?

 

[scottmk1]

Is the contactor staying in/stuck ? You could check the voltage at the tip.

Bob

Possibly, I'll try that tomorrow.

how does it weld now u have increased the wire speed?

I'm happy with it, certainly makes me look better than I really am

 

[Seadog]

Dirty wire?

 

[123hotchef]

Possibly, I'll try that tomorrow.

I'm happy with it, certainly makes me look better than I really am

well if it is welding well and not pushing the torch back turn it up some more mate

 

[scottmk1]

Dirty wire?

It doesn't look dirty if I feed some through the torch

 

[scottmk1]

well if it is welding well and not pushing the torch back turn it p some more mate

I'll give it a bash and see how it goes

 

[123hotchef]

It doesn't look dirty if I feed some through the torch

no he emans talking dirty surley listen closely

 

[123hotchef]

I'll give it a bash and see how it goes

you might be supprised! my lorch was playing up like that and its suppose to be smart! quick fiddle of the wire speed back to burning the wire as it should be

 

[scottmk1]

you might be supprised! my lorch was playing up like that and its suppose to be smart! quick fiddle of the wire speed back to burning the wire as it should be

OK cool well hopefully that's all it needs, not so sure about the talking dirty though lol

 

[123hotchef]

OK cool well hopefully that's all it needs, not so sure about the talking dirty though lol

after 10pm 30 mins left then go try lol

 

[a111r]

If it's not technique or bad front end bits, is this a new 'performance issue' with your machine?

There must be some time delay designed in, otherwise the wire would fuse in the weld pool when you release the trigger.
It could be that a component on the PCB related to the wire feed function is degrading, or otherwise, a trim pot needs a tweak?

 

[mr haynes]

Are you sure it doesn't have burn back adjustment knob?

 

[scottmk1]

Doesn't look like any burn back adjustment to me?

 

[EM1L4]

Its the little adjustment with Ar and CO2 on it

 

[EM1L4]

Found the manual...

 

[scottmk1]

OK, I've got it turned all the towards Argon

 

[EM1L4]

OK, I've got it turned all the towards Argon

I think that’s the shortest burn back 0.05s I think CO2 is max or 0.5s but I’m just a novice and I’m sure someone can provide their wisdom...