When choosing compressor you have to consider if it can Air Compressor For Laser Cutting constantly provide desired pressure and level of air. Small airbrush compressors small compressors boast impressive pressure figures but really poor flow rates sufficient limited to airbrush pistols. Even if small compressor would be able to push enough air it will likely overheat in short while.
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 blast of air was extremely weak. It is sufficient if all you have to to accomplish is engrave, although also then we got significant smoke traces around engraved picture.
it was rated for volume of ~2.4cfm and had a 1 gallon container which may be filled to 58 PSI. It were able to give us continuous 1 bar (14 PSI) of pressure, nonetheless 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 device with 13 gallon container which is filled to ~100psi. With this unit we are able to run at continuous ~2bar (31psi) without fear of overheating since compressor engine is not on constantly. Using reserve air in tank we can also drive up to 3.5bar (50psi) for brief jobs.
The best setup for me will be compressor rated to >6cfm, huge 70+ gallons tank rated to 10bar (140psi) and software air control via solenoid valve.