Miller CP-300 Welder Haas-Kamp Conversion Part 1 - Cleaning and Prep

[@elkvis]

I'm about to buy one of these, so I'll be following your adventures closely

[@wirestiresandfires214]

Let me know if I can answer any questions!

[@DeRosaDriven]

Would this be the same for a cp302?

[@ahmadmhdghazaleh7587]

My Miller CP-300 3 ph has an issue. The wire burns and turns red the moment it touches the metal even without pressing the gun trigger. Any ideas? Thanks.

[@chrismclaurin4270]

Hey man thanks for video I have a Lincoln cv-250 you think this haas kamp conversion will work on that unit I got?

[@chrismclaurin4270]

???

[@wirestiresandfires214]

I'm fairly confident it's possible. What's the serial number on the unit, I want to make sure I'm looking at the correct wiring diagram. I'll try and make a reasonable diagram for the conversion from the original. I would also suggest looking on practical machinist forum, Dave Kamp(of haas-kamp) is very active on there and he helped me tremendously. The only complication I see is that the cv 250 seems to be a little more electronic on the inside than my old unit.

[@garygordon5401]

I have a Miller MC300VS welder with a miller S54A Feeder. From the wiring diagrams it looks like the conversion would work. Can i get input from you about it i can send my millers wiring diagram if need be but it all looks the same

[@Apollo1van]

So I have Airco CV250 3 phase someone told me this may work for me are they the same ?

[@wirestiresandfires214]

They are not the same, after some casual googling it looks like the airco is simpler in some ways as it has a 2 core transformer vs a 3 core in the miller. There are some posts on weldingweb and practical machinist. I would look for some posts where Dave Kamp chimes in, the guy really knows his stuff(he and a friend basically invented this conversion). weldingweb.com/vbb/threads/261721-Hass-Kamp-conversion-on-Airco-CV250 this link has some wiring diagrams that seem decent, but no real word on how well it worked. Good Luck!

[@elkvis]

Some powdered graphite might be good on the screw drive

[@wirestiresandfires214]

I wouldn't say it turns buttery smooth now, but once I worked it back and forth it was certainly serviceable. A touch of graphite certainly wouldn't be any worse for the insides than the unavoidable grinding dust.

[@elkvis]

@@wirestiresandfires214 some molybdenum disulfide might be a better option. it's slippery like graphite, with much lower electrical conductivity.