All Laser Cutters want two additional devices which move air flow: blower which removes air flow / extracts smoke from machine and air compressor as a source for compressed atmosphere for so called air assist.
Why and How
Laser cuts by high temperature, very high high temperature focused in tight beam. Side products 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 will even get out of control leading to serious emergency.
Fire needs air to burn nonetheless it can also die if you blow too hard, think about a candle in the wind. That is essentialy what air assist is 
certainly for: compressed air is extruded straight at the laser mind in a very https://www.ever-power.net/?s=laser+cutting+air+compressor&post_type=product limited stream and is directed at the place where laser touches material.
Pressure and level of air
Pressure of atmosphere is essential variable for air assist efficienty, in our shop we discovered that optimal value is between 2 and 3.5 bar (31-50psi).
To achieve required pressure compressor must push certain level of air through surroundings assist opening, exact volume depends on size of the opening and desired pressure. Top quality laser beam cutter heads have small 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 will be able to constantly provide desired pressure and volume of air. Small airbrush compressors small compressors boast impressive pressure figures but actually poor flow rates adequate limited to airbrush pistols. Even if small compressor can push enough air it’ll likely overheat in short while.