When choosing compressor you need to consider if it can constantly provide desired pressure and level of air. Little airbrush compressors small compressors boast impressive pressure figures but actually poor flow rates adequate limited to airbrush pistols. Actually if small compressor can push enough air it will likely overheat in short while.
Our laser cutter was included with little membrane pump (Smallest upon the picture), I really do not know what specifications it has but stream of air was extremely weak. It is enough if all you have to to do is engrave, although actually then we got considerable smoke traces around engraved picture.
it had been rated for volume of ~2.4cfm and had a 1 gallon container which may be filled to 58 PSI. It managed to give us constant 1 bar (14 PSI) of pressure, but it had to Air Compressor For Laser Cutting china operate constantly and overheat badly within five minutes.
Third and current compressor we got was 6cfm rated belt driven device with 13 gallon container which is filled to ~100psi. With this unit we can run at continuous ~2bar (31psi) without concern with overheating since compressor engine isn’t on constantly. Using reserve air flow in tank we are able to also press up to 3.5bar (50psi) for brief jobs.
The best setup in my opinion will be compressor rated to >6cfm, huge 70+ gallons tank rated to 10bar (140psi) and software air control via solenoid valve.