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  1. #1
    Join Date
    Mar 2009
    Posts
    15

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

    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

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,473

    Default

    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

  3. #3
    Join Date
    Mar 2009
    Posts
    15

    Default

    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

  4. #4
    Join Date
    Oct 2007
    Location
    Cave Creek Az
    Posts
    948

    Default

    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.

  5. #5
    Join Date
    Mar 2009
    Posts
    15

    Default

    Thanks again guys I appreciate the help !!!!

  6. #6
    Join Date
    Aug 2009
    Location
    Ladysmith BC Canada
    Posts
    4

    Default Can "Run In" be disabled?

    Quote Originally Posted by walker View Post
    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

  7. #7
    Join Date
    Oct 2007
    Location
    Cave Creek Az
    Posts
    948

    Default

    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.

  8. #8
    Join Date
    Mar 2009
    Posts
    15

    Default

    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.

  9. #9
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,473

    Default

    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
    Last edited by cruizer; 02-08-2012 at 04:23 PM. Reason: reading problems.

  10. #10
    Join Date
    Sep 2005
    Location
    Appleton, WI
    Posts
    383

    Default

    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.
    Kevin Schuh
    Service Technician
    Miller Electric Mfg. Co.

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