When choosing compressor you should 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 really poor flow rates enough only for airbrush pistols. Also if small compressor can push enough air it will Air Compressor For Laser Cutting likely overheat in couple of minutes.
Our laser cutter was included with small membrane pump (Smallest on the picture), I really do not know very well what specifications it has but stream of air was very weak. It is enough if all you have to to do is engrave, although actually then we got significant smoke traces around engraved picture.
it was rated for level of ~2.4cfm and had a 1 gallon tank which may be filled to 58 PSI. It managed to give us continuous 1 bar (14 PSI) of pressure, but it had to run at all times and overheat badly within five 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 continuous ~2bar (31psi) without concern with overheating since compressor engine isn’t on continuously. Using reserve air flow in tank we are able to also press up to 3.5bar (50psi) for brief 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.