All Laser Cutters need two additional devices which move atmosphere: blower which removes surroundings / extracts smoke from machine and air flow compressor as a source for compressed air flow for so called surroundings assist.
Why and How
Laser cuts by heat, very high temperature focused in tight beam. Side items of high temperature are smoke 
and fire, both aren’t welcomed addition, smoke disperses laser reducint it’s efficienty and fire causes charring of material / edges and may even escape control causing serious emergency.
Fire needs Air Compressor For Tire Production Equipment atmosphere to burn nonetheless it can also die if you blow too hard, think about a candle in the wind. This is essentialy what surroundings assist is normally for: compressed air is extruded directly at the laser mind in a very tight stream and is fond of the place where laser touches material.
Pressure and level of air
Pressure of surroundings is essential variable for air aid efficienty, inside our shop we found out that optimal value is between 2 and 3.5 bar (31-50psi).
To achieve required pressure compressor must push certain volume of air through atmosphere assist opening, precise volume depends upon size of the starting and desired pressure. High quality laser cutter heads have small and finely tuned openings while cheaper chinese cutters simply blow in general direction via large holes.
Proper compressor
When choosing compressor you have to consider if it can constantly provide desired pressure and volume of air. Little airbrush compressors little compressors boast amazing pressure figures but really poor flow rates sufficient only for airbrush pistols. Also if small compressor can push enough air it will likely overheat in couple of minutes.