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[MasterKwan]

Miller has all the manuals on their website That's what I was quoting from. The link I posted is to the manual PDF....

[MasterKwan]

https://www.millerwelds.com/files/ow...o1325a_mil.pdf


Manual says voltage ranges from about 12 to 34v. Wire speed ranges from 35 to 700 ips.

So I'd say the markings on the dials are arbitrary numbers. With the speed probably meaning 0-100% of 35-700 ips. ...

[MasterKwan]

Your point is valid.

On the other hand, if you only need 200 or so amps, all that extra power just means you need bigger service to your breaker box for a welder that weights over 800 lb. Meaning virtually impossible to transport without a crane. The shear bulk of this thing means you'll...

[MasterKwan]

I was looking on ebay. They seem to have a wide range of prices. I see reports of them selling for $400 on up. I'd like to have a tig welder but they weight 850 lbs and require more breaker than my work shop has. You're competing against 40lb chinese welders that cost $500-700 with the same performance...

[MasterKwan]

It's just a power cord. If it was me, since I already owned it, I'd have no issue cutting it and then adding two ends. Make it two cords, one 40 foot and the other 10 ft. It's cheaper than buying an additional cord and making another short one.

Use both when you're far away and just...

[MasterKwan]

https://www.millerwelds.com/files/ow...74A_PT_MIL.pdf

https://www.amazon.com/Miller-241297.../dp/B004HEKKIM

Looks like $1400 or so bucks.

I'd probably see if what Miller wants to fix it, assuming it's not under warranty. A new one is $1900 or so, if they wanted...

[MasterKwan]

I'd just buy some raw cable, some ends and make a shorter extension cord for close in work....

[MasterKwan]

Typically a new pot is $10-20 (just priced them yesterday). I'd replace before attempting to clean. I'd measure with a meter before I did either one. Assuming the wire speed really is messed up, I agree with Aeronca41 in that it probably means some component failed around the motor control circuit...

[MasterKwan]

It's a weird ass circuit. I've never seen a triac used in DC motor control. The schematic shows that the B+ for that section should be 20-24 volts. Probably the first thing I'd do is verify the power supply DC voltage. Is it some sort of PWM setup instead of straight DC to the motor?
...

[MasterKwan]

The manual shows the schematic but there's no "wire too fast" trouble-shooting step which means you'll have to probe with a meter. Is it possible the problem isn't the wire feeder but that the welder isn't putting out enough current? Meaning that the wire feed is fine but the output of the...

[MasterKwan]

Can you turn it down enough to allow proper welds?...

[MasterKwan]

My impression is that pulse on pulse aluminum is purely a cosmetic difference. I believe the 350p is single pulse. There's a bunch of videos on youtube showing pulse on pulse aluminum.

https://www.millerwelds.com/files/ow...o1327s_mil.pdf

Here's the manual....