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.
Results 11 to 20 of 24
Thread: Miller Matic 252 Slipping
08-09-2013, 07:46 PM #11Senior Member
- Join Date
- Oct 2007
- Cave Creek Az
08-10-2013, 11:19 AM #12
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
08-10-2013, 12:01 PM #13
08-10-2013, 12:47 PM #14
08-10-2013, 01:45 PM #15
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 at 01:48 PM.
08-10-2013, 02:10 PM #16
08-10-2013, 02:26 PM #17
08-10-2013, 04:00 PM #18Bob Wright, Grandson of Tee Nee Boat Trailer Founder
Metal Master Fab Salem, Oh 44460
Birthplace of the Silver & Deming Drill
1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
08-10-2013, 08:15 PM #19Senior Member
- Join Date
- Aug 2007
- Northern California
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.Miller Syncrowave 200
08-14-2013, 07:54 AM #20
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.