Old Hobart Welder

[DaveHath]

Hi can any body ID this machine? If so How do I hook it up and make it work? I have seen a similar one running off a stationary engine. I'm kinda new to this old equipment. Here is what I know about it. HOBART MML-304 ARC WELDER, WHEELED, GENERATOR 300AMP-40V, MOTOR-220/ 440V, 3PH, 20HP, 1750 RPM, 52/ 26 AMP. Can this be made to work off a stationarey engine and be skid mounted?

[DaveHath]

Sorry I forgot the pics,

[Gene O. Carpenter]

Dave,
That "thing" is a "dynomotor" ! It uses the 222/440 to turn the armature which has 2 sets of windings and 2 commutators...1 winding is for running and the 2nd winding generates the 40volt,300 amp welding current.
Since it has a covered bearing on each end there would be no practical way to install the pulley that would be needed to run it with an internal combustion engine! UNLESS a way could be devised to direct couple it inline with the driving engine shaft. Then direction of rotation might be a problem !
Even if you were successful in hooking it to an engine and if the driving windings can be rewired you would still have to figure out a control system and it would still generate 220/440/40 which would be usless for house hold use.. It would be a conversation piece but it'll still just be a welder!It's just not practicle !

My opinion,for what it's worth, is to put that in Harrys Classified's, there's got to be someone out there that could use a welder like that! It must have a "bodacious" duty cycle !
And then look for a dedicated generator,either operational or not ! The help on this site is phenominal( think I spelled that right) ,so help to get it going is just a few keystrokes away !
Gene

[DaveHath]

Thanks, I'm not really interested in using as a generator. I need to set up a good mobile DC stick welder to mount on a trailer for maintenance work. I'll probably sell it and replace it with Gas or Diesel powered unit.
Thanks Again
Dave

[Carl Wheeler]

My grandfather had one just like it in the shop. It has to have 220/240V to make it run. Carl

[K D Redd]

Could be used in a shop which has a 20 HP RPC ( rotary Phase Converter)

Kent

[Robert Ward]

To DaveHath,

What did you decide to do with the old welder? Do you still have it? I have 480, 3 phase in my shop, so I could run such a unit with no problem. Do you want to sell it?

[Robert Ward]

PS to DaveHath,

My email is as follows:

robert.j.ward@usace.army.mil

Bob