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  1. #1

    Default Millermatic 252 Eats Tips and about 1 in 10 bad Starts

    I have a Millermatic 252 and it eats tips like M & Ms This is very annoying and expensive any Ideas

  2. #2
    Join Date
    Nov 2003
    Posts
    3,265

    Question

    Quote Originally Posted by Richard Baird View Post
    I have a Millermatic 252 and it eats tips like M & Ms This is very annoying and expensive any Ideas
    tough to speculate without...

    what you are welding.. material & thickness

    machine settings

    gas & flow rate

    wire type and size... brand...

    contact tip size and style...

    wire stickout

    not to mention some pics of the "eaten tips"

    Last edited by H80N; 10-07-2014 at 02:43 PM.
    .

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  3. #3
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    If your using real Miller tips, you likely won't have this problem. If you are then its obvious that your wire is slipping.

    See, we don't read minds, absloutely no idea how old your gun is, if you've ever changed a liner, if your using clone (cheap) tips, condition, or correct size of your driver rollers,

  4. #4
    Join Date
    Feb 2009
    Location
    Lodi, CA
    Posts
    1,285

    Default

    How is it eating tips? Is it burning back and fusing the wire, or actually melting the tip?
    Obviously, I'm just a hack-artist, you shouldn't be listening to anything I say .....

  5. #5
    Join Date
    Feb 2009
    Location
    Lodi, CA
    Posts
    1,285

    Default

    Sorry, I just went back and re-read your original post, and the title. Sounds like you are burning back and fusing the wire to the tip.

    If it is not due to incorrect voltage/wire speed settings, open the machine up, check your capacitors. This happened to me with my LN-25, the capacitors were broke loose, bouncing around at the bottom, we replaced them with new, more secure mountings, no more burning back, or wasting tips.
    Obviously, I'm just a hack-artist, you shouldn't be listening to anything I say .....

  6. #6
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    Extremely unlikey in a 252, it would mean that his drive is bouncing around, and that would throw an error. His wire is slipping to eat tips. Whether or not its a failed liner, rolls, to cheapo tips is an unknown.

  7. #7
    Join Date
    Aug 2007
    Location
    Northern California
    Posts
    197

    Default

    A welder such as the MM252 could burn tips and stick the wire if, as mentioned above, the wire is slipping in the rollers. Also, the user could have set way too much voltage and too little wire speed. It could also be a dirty liner or corroded wire.

    On my MM252, I changed the outer cover on the original torch to the one that permits a 1/8" recess for the tip. This shields the tip a bit more. I've yet to burn a tip, however, after a year of intermittent usage. I use only original Miller parts.
    Miller Syncrowave 200
    Milermatic 252
    Lincoln AC/DC "Tombstone"

  8. #8
    Join Date
    Nov 2011
    Posts
    157

    Default

    Quote Originally Posted by Synchroman View Post
    A welder such as the MM252 could burn tips and stick the wire if, as mentioned above, the wire is slipping in the rollers. Also, the user could have set way too much voltage and too little wire speed. It could also be a dirty liner or corroded wire.

    On my MM252, I changed the outer cover on the original torch to the one that permits a 1/8" recess for the tip. This shields the tip a bit more. I've yet to burn a tip, however, after a year of intermittent usage. I use only original Miller parts.
    I did just the opposite. Tip flush and no issues

  9. #9
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,910

    Default

    Quote Originally Posted by ericher69 View Post
    I did just the opposite. Tip flush and no issues
    The idea behind reccesing the tip, is for gas to wire coverage, and to prevent the tip from shorting to the work. Flush means that your working in a PERFECT enviroment, ie, no outside air movement, kinda silly really, as you may be using more gas than is required.

  10. #10
    Join Date
    Nov 2011
    Posts
    157

    Default Millermatic 252 Eats Tips and about 1 in 10 bad Starts

    It is PERFECT! In the shop with NO air movement.

    Silly is chastising someone without knowing what works for them.

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