When choosing compressor you have to consider if it can constantly provide desired pressure and volume of air. Small airbrush compressors small compressors boast amazing pressure figures but really poor flow rates Air Compressor For Laser Cutting china enough limited to airbrush pistols. Actually if small compressor can push enough air it will likely overheat in couple of minutes.
Our laser cutter came with little membrane pump (Smallest on the picture), I do not know what specifications it has but blast of air was extremely weak. It is enough if all you want to accomplish is engrave, although also then we got considerable smoke traces around engraved picture.
it had been rated for volume of ~2.4cfm and had a 1 gallon tank which may be filled to 58 PSI. It were able to give us continuous 1 bar (14 PSI) of pressure, but it had to run on a regular basis 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 are able to run at constant ~2bar (31psi) without concern with overheating since compressor engine is not on on a regular basis. Using reserve atmosphere in tank we are able to also press up to 3.5bar (50psi) for short jobs.
The best setup in my opinion would be compressor rated to >6cfm, large 70+ gallons tank rated to 10bar (140psi) and software air control via solenoid valve.