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Miller Matic 252 Slipping

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  • kiwi
    started a topic Miller Matic 252 Slipping

    Miller Matic 252 Slipping

    I have a MM 252 with a 15 foot fairly new Bernard 300 gun. The wire seems to be slipping when it encounters resistance. I checked tension and for a moment tightened it all the way up with a little more success, but I do realize that is not the solution. In addition I removed the drive wheels and removed the gun then reinstalled them. Do you have any other suggestions.
    Thanks,
    Nick

  • BukitCase
    replied
    If you really want a single, v-knurled drive roll,

    http://miller4less.com/advanced_sear...x=0&search.y=0

    But, according to the manual for the 22a and 24a wire feeders (which use same drive rolls as the 252, at least on 2-drive rolls), the knurled rolls are for hard-shelled cored wires.

    The wire feeder manual is here

    http://www.millerwelds.com/om/o193472ab_mil.pdf

    and has much more complete info on this @ page 33 or so... Steve

    Oh, the 24A kit is for a FOUR roll feeder. The 22a feeder has 2 rolls, same as the 252.
    Last edited by BukitCase; 08-14-2013, 11:47 PM.

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  • Synchroman
    replied
    Originally posted by kiwi View Post
    I found the drive roller kit for 0.35 wire the number is 079-606. Please let me know if this is the correct part number. In addition Cruizer said to use just one roller, is it possible to just purchase a sinle knurled roller. If so does anyone know that part number?
    Thanks,
    Nick

    Here is a link to Miller Mig machines. Somewhere around page 18 there is a chart showing that P/N 079-606 is a .035 V-knurled for hard shell cored wires. They give numbers for a 22A kit (079-606) and a 24A kit (046-792) but I don't know the difference. The roll kits come with two identical rollers.

    Be patient when downloading the link. It takes a while.

    http://www.google.com/url?sa=t&rct=j...50723672,d.aWc
    Last edited by Synchroman; 08-14-2013, 10:47 PM.

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  • kiwi
    replied
    I found the drive roller kit for 0.35 wire the number is 079-606. Please let me know if this is the correct part number. In addition Cruizer said to use just one roller, is it possible to just purchase a sinle knurled roller. If so does anyone know that part number?
    Thanks,
    Nick

    Leave a comment:


  • Synchroman
    replied
    Originally posted by kiwi View Post
    Hey Guys,
    Thanks for all the replies. I was aware of the "block of wood test" for setting the roller tension and that is exactly what my machine would not do even with the tensioner tightened all the way. I also realized that this would destroy the feed motor. I took the suggestions and started from there. When I adjusted the roller alignment I was able to back off the tension and still get proper feeding against a block of wood. So in this case the alignment was off and you could see that it was quite easily when viewing the roller from the top of the machine. Cruizer, the knurled roller makes sense, I will do some research and post the part number for anyone who might need it. As an aside my MM252 came with a 12' M-25 gun and I replaced it with a 15' Bernard 300 amp gun. Again thanks for the advice.
    Nick
    I'm glad you got working! I sure like mine. I did about a half hour of welding on some brackets yesterday to hold steel tubing for a project that I'm doing. The machine welds beautifully and is a delight to operate. It's a keeper!

    Leave a comment:


  • kiwi
    replied
    Hey Guys,
    Thanks for all the replies. I was aware of the "block of wood test" for setting the roller tension and that is exactly what my machine would not do even with the tensioner tightened all the way. I also realized that this would destroy the feed motor. I took the suggestions and started from there. When I adjusted the roller alignment I was able to back off the tension and still get proper feeding against a block of wood. So in this case the alignment was off and you could see that it was quite easily when viewing the roller from the top of the machine. Cruizer, the knurled roller makes sense, I will do some research and post the part number for anyone who might need it. As an aside my MM252 came with a 12' M-25 gun and I replaced it with a 15' Bernard 300 amp gun. Again thanks for the advice.
    Nick

    Leave a comment:


  • Synchroman
    replied
    My new 252 came with a 15' M-25 gun. I use the .030 rollers with the 194-011 liner (.030/.035) that came with the machine and it feeds properly. I did have an issue when I first fired it up last month. I discovered that the rollers were not lined up. I adjusted them so that the notches were perfectly in line and the problem went away.

    I presume that everyone here has seen the test in the manual for proper roller tension on page 22. That's the one where the gun is held near to a piece of wood on a slight angle and the trigger is pulled. The wire should coil up. I tried that and got the coil on the second try.

    The downward angle of the gun mount isn't a problem for me. I have welded with a friend's 250 and it has the gun mount that goes into the front of the machine horizontally. Either way would be OK with me.

    Leave a comment:


  • aametalmaster
    replied
    Originally posted by cruizer View Post
    Till ya twist the cord a little or something you have to get up and over, twists and turns. I deal with the industrial guys exclusively. And this is how I fix it. Zero problems. Just a thought.....
    The worst engineered thing about the MM252 is the downward pointing cable. If you work on a bench or up in the air like i do it always has a kink where it comes from the machine no matter how long the lead is. Miller had a write up a while ago agout the easier to load wire because the of tilt and i think its harder. The MM251's we have are much better. We have close to 50 of each machine all with 15' guns and i would take a 251 any day. Pushing 15' of .045 gas flux core is quite a challenge on some jobs, lots of time wasted fixing wire stuck in the tip or birds nests on the wire in the drive with the 252 the 251's don't seem as bad. Just my rant...Bob

    Leave a comment:


  • cruizer
    replied
    Originally posted by cope View Post
    I put a 15' M25 on my MM210, and it feeds fine with the factory rollers. Actually, Miller sells the M25 in 10', 12' and 1`5' models.

    http://www.millerwelds.com/products/...s/migmatic.php
    Till ya twist the cord a little or something you have to get up and over, twists and turns. I deal with the industrial guys exclusively. And this is how I fix it. Zero problems. Just a thought.....

    Leave a comment:


  • cope
    replied
    Originally posted by cruizer View Post
    Unsure, though the last time I measured a M-25 it was 12', The extra 3' just kills the motor, ie, the use of a knurled roll.

    A 4 roll is 15', 2 rolls are 12' as far as I know...
    I put a 15' M25 on my MM210, and it feeds fine with the factory rollers. Actually, Miller sells the M25 in 10', 12' and 1`5' models.

    http://www.millerwelds.com/products/...s/migmatic.php

    Leave a comment:


  • cruizer
    replied
    Unsure, though the last time I measured a M-25 it was 12', The extra 3' just kills the motor, ie, the use of a knurled roll.

    A 4 roll is 15', 2 rolls are 12' as far as I know...
    Last edited by cruizer; 08-10-2013, 01:48 PM.

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  • Great White TJ
    replied
    Click image for larger version

Name:	Jeep grill.jpg
Views:	1
Size:	10.4 KB
ID:	516006My 252 came with a M-25 Gun, the unit is 4months old.

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  • aametalmaster
    replied
    Originally posted by cruizer View Post
    OK, didn't read all the posts, buttttt, that machine never came with a 15' gun.
    They do now...


    Larger Work Area

    Now with longer 15-ft M-25 gun.
    ...Bob

    Leave a comment:


  • cruizer
    replied
    OK, didn't read all the posts, buttttt, that machine never came with a 15' gun. Some never have a problem pushing wire through it, but most do. What you HAVE TO DO is, get yourself a single knurled drive roller, of the size of wire your using. Install it and don't crank the tenstioner down much. This will save your drive motor from baking itself and reduce your stress levels. Do not install both knurled , ONLY one....


    This is what I do as a service tech

    Leave a comment:


  • walker
    replied
    Ditto checking the liner. Try this; run the wire through the liner, do not close the rolls. Grab the wire at either end with a pair of needle nose pliers, and push back and forth through the liner. It should be very easy to feed with a straight gun. Form the cable in a loop and feel the change in force required to feed it, now screw on the front end consumables and feel the difference. Also, check the liner for size. I had tons of trouble with Bernard liners feeding 035 wire, through an 035-052 (iirc) liner. The wire would zig zag inside the liner, and I had major feeding issues for a long time before I figured it out.

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