Can an oversized mig gun liner cause misfeed problems?

[chadjans]

Lincoln Powermig 215: I was using a .035 solid core wire. Ran out on the 33lb spool. I was wanting to try a .030 wire solid core. So I bought the .030 wire. Switched the drive rolls and quide plate to the correct size. The welder still won't push the wire. Even with the pressure cranked, it just bird nests. I am sill using the .035 gun liner, can an oversized gun liner cause misfeeds or lack there of?

Chad

[Stupid frnch jackasS]

yes. Maybe the liner or contact tip is poorly lined up, or too short to start with, and the small wire worsens the phenomenon.
I'm running 0.031 in a 0.039/0.047 liner and it works flawlessly.

[Aces'n'8s]

Did you remove the welding tip from the mig gun? If you don't, the wire will usually snag itself on the lip at the threaded end of the tip.

[chadjans]

The wire clears the liner and tip. It just will not push strong enough. If you put any resistance to the wire, i.e. push it to the ground and pull trigger it will not feed.

Chad

[D60]

Isn't the standard just kind of an .035 liner, but that just means it can handle UP TO .035, not ONLY .035? I dunno, I've used the .035 liner for everything from .023 to .035 without a problem.

It sounds to me like you have another issue, ie you're probably due for a new liner anyway. How old is this liner? And did you have any feed problems with the .035 wire?

[4x4extreme]

Do you have the right pressure on the drive rollers

[D60]

Do you have the right pressure on the drive rollers

Sounds as tho he's tried various adjustments:
Even with the pressure cranked, it just bird nests

[Aces'n'8s]

If you have checked all the areas mentioned previosly, try pulling the wire out and feeding it back in the liner and gun again. It may have just caught up on a burr or something. If you think you ever kinked the liner in the past, this is especially true.

[KILLER"B"3]

I run size range of .023 to .045 thru my liner, the only time I experience bird nesting is on the 3lb spool when it is close to running out. It is being pulled at such an angle that it binds up causing it to bird nest. So I try to keep all my wire sizes in 10lb spools. It gets expensive but so does throwing away half a spool from a 3lb'er.

[AprilzWarrior]

Sounds as tho he's tried various adjustments:


Sounds like hes using smooth drive rolls when you should be using the drive rolls with teeth.

Basically its slipping at the rolls. Running a larger liner or even tip wont affect the wire feed. Unless your using aluminum wire. This is a drive roll issue Id bet on it.


*edit*


could also be the spool itself. Ive seen cross wrapped spools several times where its wound incorrectly.

AW

[MuddMachine]

Sounds like hes using smooth drive rolls when you should be using the drive rolls with teeth.

Basically its slipping at the rolls. Running a larger liner or even tip wont affect the wire feed. Unless your using aluminum wire. This is a drive roll issue Id bet on it.


*edit*


could also be the spool itself. Ive seen cross wrapped spools several times where its wound incorrectly.

AW

He says it's bird nesting so the drive rolls are feeding it, could be a gunky liner. Take the liner out, clean it with thinners or something and then blow it out. Do you have the right size tip? Using too big a tip will cause you alot of grief.

Ditto on the incorrect winding too.

[Static-XJ]

I don't think an oversize liner could be the issue. At work we've found that 1/16" liners were lasting longer and fed smoother with .045 wire than the .045 liners. We were running through almost one 44lb spool per day, per welder (two for this job). The larger liners made a huge difference.

[knaffie]

Oversize liner won't hurt anything. Its common practice to use a liner .010" over the wire size you're using.