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Checking out used Miller XMT 350 cc/cv

10K views 22 replies 10 participants last post by  Steve007  
#1 ·
Hello,

I found a Miller XMT 350 cc/cv for sale at a great price, $600. It is just the power supply, no leads.

I would like suggestions on how to check this out before I buy it. Six hundred seems like a screaming deal.

I have leads from an older Dialarc.

Also, some of the cc/cvs had a feature that not all of them had. I almost think it was pulse but don't remember.

I would appreciate your opinions and suggestions.

Thank you in advance.
Steve
 
#2 ·
Yep, take your leads. Find out whether it has Tweco or Dinse connectors and either buy lead adapters or ends so your Dialarc leads will be usable.

Take a TIG torch if you have one, and everything needed to use it including a 14-pin control if you have one. If you can beg or borrow any 14-pin feeders like a 30A spoolgun, 8RC or 12RC suitcase, then you can try out the MIG circuits and the 14-pin wiring.

Not sure about the 350, but my 304's both have a marked spot on the main dial for pulsed MIG. But you need a separate pulsing pendant to use that function. I know there were and are 350's with built in pulse. Might be called the 350P or 350 MPa, can't remember. I'll bet there are extra pulse buttons and stuff under the hinged front cover in those cases, but you should probably look for some pics on ebay or somewhere else to see what they'll look like so you can quickly recognize them. Pulse / no pulse is not a deal breaker unless you're doing some pretty oddball stuff.
 
#10 ·
I'm honestly surprised. When I went to school, we had ten XMT350s, ten Dynasty 350s, and only two rod choices for standard work: 6010 and 7018. Neither the XMTs nor Dynasties gave us trouble with 6010. Each machine burned through hundreds of pounds of 6010 without so much as a hiccup. Hell, I personally have probably run 1,000 feet of 6010 root passes on them without issues. The worst part about it was not the machine's fault, it was the difficulty removing 6010 slag. I could never get it to lift off like 7018. The machines did their part like champs.
 
#8 ·
Most, if not all, INVERTERS struggle with 6010s. The problem is not restricted to XMTs. Celluosic electrodes do not perform well on inverters. Software and voltage range are not optimized for burning 6010s. Reference, post #7.

Switch to 6011s. Problem solved.
 
#13 ·
The 350 XMT will run 6010 fine. I have extensive use on the XMT 350.
If you want to test the mig feature you don't need to connect with the 14 pin hook up. You can plug a suitcase feeder directly to the leads and burn wire. The machine does have a gas solenoid for mig or duel shield wire welding.
The XMT arc does have a whistle sound when stuck welding but they weld just fine.
 
#14 ·
If you had your location listed, someone near might offer a wire feeder / tig parts to test the rest of the machine.
 
#19 ·
My school taught us to weld on 6010 Linclon 5P+ 1/8"on 304's. Can't claim a lot of experience beyond them, but I passed many bend tests with those in the class. My biggest problem passing was my torch work prepping the samples, not the actual weld... Flat, horiz, vert up, overhead... I even picked up a used one for home, but have only run it for MIG with a 22A Feeder, really. I guess I don't see the problem with a 304 (or probably a 350) and 6010... But what do I know?
 
#20 ·
@ davec - check. Same here. Trained on several beat-to-death-from-use XMT304s at our local school house. Ran 5P+ fine~ish. Passed multiple D1.1 bend tests for 3G on 3/8" plate. Did not run/bend any 1" samples in 3G using the XMT.
 
#21 · (Edited)
I've passed pressure pipe bend tests with an XMT. That's good enough for me. I've welded a lot of low hy structural with an XMT.
I still prefer the Invertecv350 over an XMT for any type of smaw welding.
Not all inverters struggle with 6010.