Download Software Hobart Rc-256 Manual

Jun 13, 2016 I have aquired a Hobart RC 256 three phase welder and have attempted the. Converting an RC 256 to. The second is a diagram I got from the manual. Download now any manual for HOBART RC 256 WELDER Summary of the research: User's guide, Owner's Manual, Instructions Book, Service manual, Workshop Manuas.

I am posting this here as informational, I know Pirate4x4 will be here for years to come, it is also a top site on google search results. I dont want to make a WeldingWeb account just for this. Hopefully This information may come in handy for someone else looking to convert this industrial welder to home/small shop use on the cheap. I picked this up today for $400, its an oldie (1979).

How To Include A Js File In Html more. Hobart RC-256 with Hobart 27 wire feeder. 100% duty cycle @ 200 amps, max OCV is 38, not sure what maximum amps are, but I would imagine its pretty high. I spent a lot of time trying to find info on this welder with not much luck, there is a thread on Welding Web to convert it to single phase but that's about as much as I could find. Infinitely variable voltage (no taps) Its a dual transformer setup with a single choke, its also got 2 Variacs in a buck boost setup.

I plan on converting it to single phase to work at my house. Its strange that there is no capacitor on the output, I think adding one would make for a much smoother arc. I might try this just for fun. I have a question about the wire feeder, I am missing the wire that goes from the mig gun trigger to the wire feeder unit.

I am not sure what connector it uses. To me it looks like a large headphone jack, but that doesn't seem right to me. Does anyone have experience and know what connector that is? Well, I converted it to single phase, I did it a bit differently than the guys on welding web. Their focus was to try to emulate the 3 phase waveform by introducing capacitors on the input of one of the transformers, this would phase shift one of the transformers 90 degrees and bring it closer to 3 phase. By default the transformers are ran in series, producing 38 max OCV, 200amps.

If I were to add an output capacitor bank, it would bring the OCV probably close to 50v, wayyy too high. Instead I am running the transformers in parallel. This is producing 26 max OCV, and theoretically 400amps. When I add a capacitor bank to this setup, it should bring the max OCV back up to around 38v. I think the theory behind the original setup, is that with 3 phase you can get a decently smooth arc without output capacitors. Whereas with single phase the arc is not very stable, so output caps are needed.

Since I want to add caps anyways, I think running the transformers in parallel is the ideal setup. I noticed the wire feeder doesn't spin at around less than half the dial, maybe the motor or something needs to be cleaned and lubed. At max the wire feeder cant keep up. Max wire speed is netting a little over 200 amps.

Pretty exciting. I threw a 59,000uf capacitor on the output right before the choke. Results were great and as expected. The arc is much smoother with much less popping, I ran out of flux core wire for testing, so I am using solid core without gas. (I moved recently due to the Army and they wouldnt bring my gas cylinders, they wouldn't even bring my Soda Stream C02 tank.

) Hopefully I can find an affordable cylinder in the new few weeks) Max OCV is now around 38, the voltage adjustment is pretty accurate until you start dipping below 24v on the dial, it does not want to go down below 24v. Minimum OCV is 18v for this machine according to the dial. For my purposes, I did not buy this machine to weld thin sheetmetal so I am not concerned about this. Load voltage drops as expected throughout the operating range.