Dan, I can't do the 16ga. with 210

[Srubrn]

Dan,

It is a good thing I still have my HH135 becasue I can't do anything but burn holes in that 16ga. tubing. I tried the tap 2 and 28 fpm and I just burned holes. I can however weld it where there is no joint or gap, like maybe a lap joint.

[Jerry]

Re: Dan, I can't do the 16ga. with 210

Originally posted by Srubrn
Dan,

It is a good thing I still have my HH135 becasue I can't do anything but burn holes in that 16ga. tubing. I tried the tap 2 and 28 fpm and I just burned holes. I can however weld it where there is no joint or gap, like maybe a lap joint.

You'll find that with metal that thin you will need to spot weld it along its length. When welding tubing on its radious the best way is to weave from part to part and weld very low settings for the radious and gauge of material will make this very difficult to weld without burning thru.

[10secBu]

There should be no reason you can't weld 16 ga sheet steel with a MM210. I did quite a bit of it using my MM251 on my tailer.

I used .030 wire with 75/25 gas mix, but typically use .023" wire for thinner stuff in the bidy shop industry.

There are a couple tricks...either spot or trigger weld on/off if it's an outside corner, or lengthen your wire stickout to reduce the heat input. You usuallu have to move pretty quick on sheet metal to prevent burn through and minimize warpage.

On thinner stuff, it's better to weld short welds than to try and lay one long bead...typically, 1 to 1 1/2" long bead max...thinner stuff, use 1/2" weld beads.

[Srubrn]

I think I will just use my 135 for this stuff.

[Dan]

Todd

Honestly sq tube with a 16 ga wall thickness is no problem for your MM 210. With the proper settings you should have no problem with burn thru. Im assuming, if you are having burn thru problems with settings you mentioned you must be welding a miter joint (see attachment) which means two butt joints and an outside corner joint to deal with. On these joints I d suggest trying voltage tap #1 and the wire somewhere around 25 to start with, then adjust the wire down more if you need to.

Todd, I do have to admit though that I personal like using my HH 135 or HH 175 on thinner material over the MM 210. This isn t based on weld quality, because I have no problem welding 16 ga with any of my wire feed machines. I just like the smaller H-10 gun over the larger M-25. I mainly purchased the MM 210 for 1/4" steel. My plan was to run an all position gas shielded fluxcore wire on it. However as you probably know I discovered that I was able to produce spray transfer with the machine at a duty cycle acceptable for hobbiest welding, which is all I use the machine for. I have a few projects this summer helping my Dad fab a few new pieces of farm machinery, which would probably push this duty cycle so I m hoping that things go OK around here so that next month I can get the MM 251 that I want.

By the way I came acrossed one of my test pieces that I ran on the sq tube with a 16 ga wall thickness. I ll post a couple pictures of these welds for you. I don t remember the settings right now, but I know I posted the settings for you already.

[Dan]

weld on 1 1/4" x 1 1/4" x.063 sq tube

[Dan]

One more weld on 1 1/4" x 1 1/4" x .063 sq tube

[Srubrn]

I am having trouble on the same joint as you show the pics on. If there is a gap, I burn right thru. I will try tap #1 next time. I am still learning.

If you look at this thread, you can see what I was building with 16ga. tubing.

http://www.hobartwelders.com/mboard/showthread.php?s=&threadid=1720