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Welding Discussions
A place to talk about how-to, techniques, troubleshooting, welding processes, welders, plasma cutters or other metalworking tools.
Topics: 28,868
Posts: 282,961
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Bobcat 225 Adjusting Idle/Hz/RPM and Voltage
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Welding Projects
Whether you want to build it or fix it - share advice, ideas, plans and photos.
Topics: 5,832
Posts: 62,884
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Camera Mount
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Motorsports
Topics ranging from stock cars to street rods and motorcycles to trucks.
Topics: 551
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oil pan madification
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Has someone fooled with the rheostat? Have you welded with it to see if the heat increases when you turn the rheostat?Today, 06:00 AM
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Reply to XMT350 exploded capacitorsTry doing diode tests across each. If there is a dead short across any of them both need to be replaced. If one tests different from the other thats a sign one is bad also. Check the diodes and resistors on the power board....Today, 05:57 AM
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Reply to Melting TungstenAll multimeters measure polarity. If it's a digital one, it'll show a positive (no polarity symbol) reading if you connect the red probe (which should be in the V/ohms socket on the meter) to positive and the black probe (which should be in the common socket on the meter) to negative, and a negative...Yesterday, 07:19 PM
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Multimatic 220 set to 1/8 mild steel. I didn't touch the work or filler wire, the arc is about 1/8 inch. Using the tungsten that came with the welder from the factory. I'm a newb with only a few minutes actual tig time, but constantly needing to resharpening my tungsten after a minute or two. I posted...05-13-2021, 07:41 PM
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Bobcat 225. I found here in the forum how to adjust low and high idle using a Hz meter. I did that and when I check AC voltage at the receptacle, I am only getting 90vac. Do I adjust the RPM higher or look for a problem somewhere else?...05-14-2021, 06:48 AM
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Hello,
Please forgive me if this is outside of the rules on this board.
I wanted to get the word out that I buy nearly any kind of modern-ish broken (mostly) welding machines and plasma cutters. I have been buying several victor brand and spectrum plasma cutters each month...05-10-2021, 04:59 AM -
Does anyone know how to test the IGBTs on an xmt350? My capacitors exploded yesterday. Heard that it takes the IGBTs with them or the IGBT caused it and the PC-2 needs to be checked out and some resistors replaced at least if not an entirely new PC-2 interconnect board.
I am going through...05-14-2021, 05:03 PM -
Good Morning,
I have a Miller XMT 350 CC/CV Auto-Line S/N MB29012A. Its connected to single phase power which is at around 245 volts AC phase to phase.
The machine starts up and shows data on the display. Any setting with a voltage display reads between 0v and 0.3v. The amperage...05-08-2021, 02:20 AM