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When choosing compressor you have to consider if it will be able to constantly provide desired pressure and volume of air. Small airbrush compressors small compressors boast impressive pressure figures but actually poor flow rates sufficient limited to airbrush pistols. Even if small compressor would be able to push enough air it will likely overheat in couple of minutes.

Our laser cutter was included with small membrane pump (Smallest upon the picture), I really do not know what specifications it has but stream of air was extremely weak. It is adequate if all you want to accomplish is engrave, although also then we got considerable smoke traces around Air Compressor For Laser Cutting engraved picture.

it was rated for volume of ~2.4cfm and had a 1 gallon container which can be filled to 58 PSI. It were able to give us constant 1 bar (14 PSI) of pressure, but it had to run at all times and overheat badly within 5 minutes.

Third and current compressor we got was 6cfm rated belt driven unit with 13 gallon container which is filled to ~100psi. With this unit we can run at constant ~2bar (31psi) without fear of overheating since compressor engine isn’t on constantly. Using reserve air in tank we can also force up to 3.5bar (50psi) for short jobs.

The best setup for me would be compressor rated to >6cfm, large 70+ gallons tank rated to 10bar (140psi) and software air control via solenoid valve.