Miller syncrowave 250

[gimpyrobb]

Found a 250 with cooler, pedal, 300 pulser, and new torch(ck20) for $1200. Going to try it out tomorrow. What do I need to watch out for?

[GWIZ]

Make sure it is "not" a three phase only machine.
and check voltage requirements.

[gimpyrobb]

Would the serial number tell me that? I know you can look them up on-line.

[mccutter]

Originally Posted by gimpyrobb

Would the serial number tell me that? I know you can look them up on-line.

Yup, ser # will lead you to a manual and also you can find out the year of mfg. Price depends on if it is an earlier model or later. Good price for later model and it sounds like it has a cooler (20-series is wc 250A torch). The pulser is a bonus, I think to add it was $300 or so. If it is in rough shape and has been out in the weather I'd be prepared to pull the cover(s) off and take a look. Ideally you'd bring a bottle of Ar, gloves, hood, scraps, filler, Ws, etc. so you can lay down some beads. If you can get a continuous foot of weld I'd say it's a keeper.

PS: last one I had was about 5 years old and I got it for $2000. Sold a few months later for $2500. They DO take up a lot of space and are in the 500lb range...

[gimpyrobb]

Serial KA911690

[gimpyrobb]

Manual
https://www.millerwelds.com/files/ow.../O353D_MIL.pdf

Looks like a 1990 single phase compatible.

[toprecycler]

The serial number should. But if you can read the serial, you should be able to read the rest of the info tag.

Make sure the high frequency start works.

Check the foot pedal for smooth amperage control. Replacements for Miller/ Lincoln are pricey.

If it does not, the electrodes might need adjustment.

Side story, I have a Lincoln precision tig 275. I just added a cooler to it last year. On initial test welds, it was working fine. Then the high frequency start stopped working.

I had forgotten to tighten the new lead in properly, and coolant was leaking down the welder, into the opening for the electrode adjustment. The coolant shorted out the high frequency. I blew it out with air, tightened the connection, and it worked again.


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[JBFab]

I can't imagine how that would work, for standard mig or fcaw you need a CV power source.

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