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CNC Plasma Air Pressure Flow Inconsistency – Tips and Tricks with Jim Colt


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In this episode, Jim Colt, an industry expert from Hypertherm, talks about CNC Plasma air pressure flow inconsistency. Visit https://www.maverickcnc.com/ for more information on all of our plasma cutting tables.

Air pressure-flow inconsistency is a common problem that people run into, but it has little to do with the size of the compressor you have. Most likely the issues with the airflow have to do with the size of the hose going from the compressor to the plasma.

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Video description :

Hi this is Jim and I’m here with MaverickCNC. One of the things I always run into is with air pressure flow inconsistencies that come into the plasma cutting system, very common problem that we run into and it really has little to do with the size of the compressor that you have, unless your compressor is way too small, of course. You can have a 500 horsepower compressor with a 1000 gallon tank on it and you can still have low air flow coming into the plasma and the air flow is really related to the plumbing that goes between the air compressor in the plasma so 3/8 inch hose, if you’re running quarter inch hose you’re going to have trouble.

If you have 3/8 ID hose you’re probably ok unless you’ve added too many filters to it. Everybody wants to put filters to separate water, moisture content from the air or oil from the air or particulates from the air and every time you add anything to an air line between the compressor and plasma cutter, you will affect the flow somehow. It’s going to cause a restriction. Here at Welders Supply in Louisville, their solution for troubleshooting anyway is a gauge with a quick disconnect fitting and a flow meter that you can actually pop right on the back of a plasma cutter and you can look at the real time flow to the plasma as well as the static and dynamic pressure going into the system.

So it’s a good troubleshooting tool. You can get away without the flow meter, you know in simple cases, just put a gauge on but it has to be right at the back of the plasma cutter, not 10 feet away and certainly can’t be any filters or anything like that in between the gauge and plasma cutter or you’ll get an incorrect reading. So air flow, air pressure into the back of the plasma is absolutely critical. That air flow and air pressure is what controls the cut quality and also controls the cooling of the torch. So consumable life and cut quality are key issues with correct air. This is a good tool to troubleshoot that. Thanks.



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