All Laser Cutters need two additional gadgets which move atmosphere: blower which removes atmosphere / extracts smoke from machine and air flow compressor as a source for compressed surroundings for so called atmosphere assist.
Laser cuts by heat, very high temperature focused in tight beam. Side products of high heat are smoke and fire, both are not welcomed addition, smoke disperses laser beam reducint it’s efficienty and fire causes charring of material / edges and will even get out of control causing serious emergency.
Fire needs air flow to burn but it will certainly also die in the event that you blow too hard, think of a candle in the wind. That is essentialy what air assist is usually for: compressed air flow is extruded directly at the laser mind in a very restricted stream and is fond of where laser touches material.
Pressure of surroundings is key adjustable for air help efficienty, inside our shop we found out that optimal value is between 2 and 3.5 bar (31-50psi).
To accomplish required pressure compressor must push certain level of air through surroundings assist opening, specific volume depends on size of the starting and desired pressure. High quality laser cutter heads have little and finely tuned openings while cheaper chinese cutters simply blow in general Laser Cutting Air Compressor direction via huge holes.