All Laser Cutters want two additional devices which move surroundings: blower which removes surroundings / extracts smoke from machine and atmosphere compressor as a source for compressed surroundings for so called surroundings assist.
Why and How
Laser cuts by temperature, very high heat focused in tight beam. Side items of high heat 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 get out of control leading to serious emergency.
Fire needs atmosphere to burn but it can also die if you blow too hard, think of a candle in the wind. That is essentialy what air flow assist is definitely for: compressed air flow is extruded straight at the laser mind in a very tight stream and is fond of where laser touches material.
Pressure and level of air
Pressure of air flow is essential variable for air support efficienty, inside our shop we found out that optimal worth is between 2 and 3.5 bar (31-50psi).
To attain required pressure compressor needs to push certain volume of air through surroundings assist opening, specific volume depends on size of the starting and desired pressure. Top quality laser cutter heads have Air Compressor For Tire Production Equipment little and finely tuned openings while cheaper chinese cutters just 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 small compressors boast impressive pressure figures but really poor flow rates adequate only for airbrush pistols. Also if small compressor would be able 
to push enough air it’ll likely overheat in short while.