Metal cutting - oxyfuel cutting, plasma cutting, machining, grinding, and other preparatory work.
Miller plasma cutter 375 spectrum
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borntoweld
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Just bought a miller plasma cutter a 20 gallon Ingersoll Rand air compressor just looking for some tips on settings and if I have enough electrical amps for the plasma cutter. The electrician put in a 20 amp fuse. When I'm cutting it seems to keep throwing the fuse so have to stop and start over any suggestions would be helpful. Thank you
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borntoweld wrote:Just bought a miller plasma cutter a 20 gallon Ingersoll Rand air compressor just looking for some tips on settings and if I have enough electrical amps for the plasma cutter. The electrician put in a 20 amp fuse. When I'm cutting it seems to keep throwing the fuse so have to stop and start over any suggestions would be helpful. Thank you

You running it on a 115v outlet with a 20amp fuse??

A good friend of mine, AKmud, has the same machine, I'll see if he'll chime in.

~John
Just a couple welders and a couple of big hammers and torches.

Men in dirty jeans built this country, while men in clean suits have destroyed it.
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Based on the specs for your machine, 20 amps at 115v will limit you.
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borntoweld
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thank you John
yes, I am running it on a 20 amp fuse.
Thank you again for getting back to me. teri
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borntoweld
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John
I think I just figured it out. I had my settings set wrong on the plasma cutter. I had the PSI set to high so I turned it down and now it seems to be cutting like cutting through butter.
Thanks again
Teri
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borntoweld wrote:John
I think I just figured it out. I had my settings set wrong on the plasma cutter. I had the PSI set to high so I turned it down and now it seems to be cutting like cutting through butter.
Thanks again
Teri

Nice!
What air pressure where you running?
Just a couple welders and a couple of big hammers and torches.

Men in dirty jeans built this country, while men in clean suits have destroyed it.
Trump/Carson 2016-2024
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I have the same trouble. I am running my machine on 115v right now and it calls for about 80 psi but I am lucky to get it to cut on 60. I am running around 40 psi and it cuts awesome. I have no trouble with it. When I ran it at a higher psi, when the compressor would kick on, and since the machine and compressor are on the same circuit, my cuts would sputter and wouldn't cut. I turned it down and now it will cut even with the compressor on. It takes a little bit of tuning and tweeking to get one set right but once you find the sweet spot they are amazing. :)
It's always best to build your own, especially when it comes to hitches!!!
Matt
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