We also use compressed air, and ours is filtered to prevent moisture.
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Originally Posted by Andrew Blair
We just use the schools compressed air for ours. This drawing a bit off topic, but perhaps a gas would improve this. How can you make precise cuts in Al with a plasma cutter? We have no problem with steel, but with 1/8" Al, it just leaves an 1/8" cut, and terribly ragged edges.
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How many amps and at what speed are you running the cutter? We get great cuts on aluminum, so I'll look up the numbers on Tuesday at our meeting and post them.