I've got one of these cheap welders / plasma cutters. I want to use the plasma cutter don't I don't have an air compressor yet.The manual specifies that it needs 50-80 PSI (60 recommended), but doesn't specify the CFM. Does anybody have a similar plasma cutter and have suggestions for CFM ratings? This machine is 110V or 220V and the cutting amps can be adjusted between 10A-50A.
>>1957488I'm reading that article right now.
>>1957481I gave almost the exact same one they are made mostly the same with different names.the CFM is not really relevant for a plasma cutter. You just need enough air coming out of the nozzle to blow the melted metal away.I provide mine with 125 psi and then set the pressure to the plasma cutter depending on the thickness of metal I am using. for thin sheet metal 40psi is fine for half in or so you might want 80.
>>1957498That's good to know. The articles I've read say to get a compressor that's rated 1.5x the cutter's CFM requirements. So that's what I was wondering about since mine didn't specify CFM.Do you just have a little pancake compressor then? I see a lot of cheap compressors for sale that are easily rated for 100+ PSI but then only like 2CFM. The ones that are rated for 5-7 CFM are like $300 at the lowest.Right now I'm mostly working with sheet metal, but eventually once I'm a better fabricator I'll want to start cutting up to 1/4" plate.
>>1957517I use mine with a 5 gallon compressor, which is fine for short cuts of a few feet on sheet metal before the compressor kicks in.A pancake compressor would probably not hold enough for long cuts. If you don't already have one, I would recommend the largest compressor you can afford. if you need it portable that is a different story.I high CFM compressor will mean you can cut longer though.
>>1957481A home gamer compressor isnt going to be good unless it's got a huge tank, and even then that will be short cuts. If you just want to try it out, try renting a nitrogen bottle and regulatorIf you're pretty committed, then get a 240v compressor
>>1957550>nitrogen bottle and regulatorfor plasma cutting? that's a bit overkill.
>>1957550The manual for this says to use compressed air only.I'm just working out of my garage practicing stick welding with this thing so far. I'm planning on making a small table for my PC to sit on and then some patio furniture to practice, but ultimately I want to build some bumpers and skid plates for my Jeep. As of now only have access to 120V, so I'll probably look into a 10-30 gal compressor... and try to get as high of a CFM rating as I can, but not sweat it if it's not like 6CFM.I've been on /biz/ a lot lately so hopefully my investments will pay off so I can eventually buy a house and build a nice workshop. So far, so good.
You could figure out the maximum possible cfm by knowing the air outlet size, the input pressure and some math.