Interesting.

[Shield Arc]

I found some interesting reading. Both from Miller.:confused3:

 

[Fifelaker]

They don't say that the 3/16" weld will be cold and weak just that it will weld it:stirthepot:

 

[Shield Arc]

The Miller calculator says it takes 140 to 150-amps to weld 1/8-inch steel.

 

[ericher69]

They don't say that the 3/16" weld will be cold and weak just that it will weld it:stirthepot:

I know with the MM252 I almost always use the next up settings as I find the reference card on the front of the welder too cold for my taste.

Sent from my iPhone 5s 64Gb using TractorByNet

 

[Mark @ Everlast]

You mean the interesting reading where they recommend 70S-3 and say it is common and economical? :mur: Or where it says the welder is rated for 90 amps at 20% duty cycle?

 

[Shield Arc]

I find it interesting that Miller sales says the machine can weld up to 3/16-inch thick steel. And output range is 30 to 140-amps. But the Miller calculator says it takes from 140 to 150-amps to weld 1/8-inch steel.:confused2:

 

[MinnesotaDaveChalmers]

I find it interesting that Miller sales says the machine can weld up to 3/16-inch thick steel. And output range is 30 to 140-amps. But the Miller calculator says it takes from 140 to 150-amps to weld 1/8-inch steel.:confused2:

Seems I remember the common caveat goes something like this "...with proper prep and multiple passes.."
Not very specific and leaves too much grey area to quibble over.

Personally, the part I generally dislike is when any manufacturer lists the duty cycle of a 140 amp machine as 20% at 90 amps and drawing 20 amps 120v circuit.

But often they don't list the duty cycle or amp draw at 140 amps.

Some I've seen list the max output at 10% duty cycle and 28 amps draw.

 

[Mark @ Everlast]

Most 140 amp welders really ARE about 90 amps. They can spike up to 140 amps, but most of the time you will see them running on a meter around 90-110 amps. Ever wonder why there is no digital meter on these things?

 

[Shield Arc]

Ever wonder why there is no digital meter on these things?

I never paid any attention to them. Don't remember seeing any in my line of work.