Miller 30 amp spool gun drive roller slow then speeds up?

[wamcleod]

http://www.millerwelds.com/resources...xclamation.png

Hello, Is the drive roller supposed to turn slow when the trigger is first pressed then after a few seconds speed up? If so what is the purpose of it?

Thanks
Bill

[cruizer]

Because your "Run-in" off the power source is on a percentage of where ever you have your 30A set on.

Not 30Amp, its a 30A

[wamcleod]

Thanks now could you explain "run in", in case you have not guessed this is a new setup for me. It is hooked up to a miller 251 if that affects anything

[walker]

Run in is the time that the wire feeds slowly, so that it gives you time to let go of the darn trigger before it bird nests after the aluminum wire arcs back and fuses itself inside the contact nozzle!

Run in is to give the arc time to establish and start the puddle before cramming in a bunch of wire.

[wamcleod]

Thanks again guys I appreciate the help !!!!

[jessey]

Run in is the time that the wire feeds slowly, so that it gives you time to let go of the darn trigger before it bird nests after the aluminum wire arcs back and fuses itself inside the contact nozzle!

Run in is to give the arc time to establish and start the puddle before cramming in a bunch of wire.

Hi Walker,

Do all the Miller Mig welders have this "Run In" feature? Is there a way to disable this feature.

Thanks
jessey

[walker]

It sems as though the newer ones do. The higher priced welders seem to have an adjustable run in timer, though the lower end ones do not. I have never had an issue on the welders that do not have it, and the only issue I have with the ones that do is when I am doing small spot welds on thin sheet metal. You have to adjust the wire speed up, so that the run in is hot enough to make the spot weld.

[wamcleod]

Thanks for the info. This is on 251 Miller and I have not seen anything about the run in on the machine or on the gun. Is the run in controlled by the 251 or is it in the the 30A gun? We tried the M25 (steel) and it does not seem to do a run in
Help is definitely appreciated here.

[cruizer]

Well, the 251 is factory set to have a run-in @ 100%, sooo, you wouldn't notice it on your mig gun, however it is adjustable in a sub menu if you had a looksee in your owners manual.

I read the tech manual a little farther, and you can set your spoolgun to 100% as well in the submenu, so there you have it

[Miller Kevin]

The run-in on the Millermatic 251 for the steel gun is factory set at 100%. The run-in for the spoolgun is factory set at 50%.

These are both adjustable.