Laser cutting air compressor

All Laser Cutters want two additional devices which move atmosphere: blower which removes air / extracts smoke from machine and surroundings compressor as a source for compressed air for so called air flow assist.

Why and How
Laser cuts by warmth, very high temperature focused in tight beam. Side items of high temperature are smoke and fire, both aren’t welcomed addition, smoke disperses laser beam reducint it’s efficienty and fire causes charring of material / edges and may even escape control leading to serious emergency.

Fire needs surroundings to burn but it will also die if you blow too hard, think of a candle in the wind. That is essentialy what surroundings assist is definitely for: compressed atmosphere is extruded straight at the laser head in a very limited stream and is directed at where laser touches material.

Pressure and level of air
Pressure of surroundings is key variable for air aid efficienty, inside our shop we discovered that optimal value is between 2 and 3.5 bar (31-50psi).

To achieve required pressure compressor needs to push certain volume of air through air flow assist opening, exact volume depends on size of the starting and desired pressure. High quality laser cutter heads have small and finely tuned openings while cheaper chinese cutters just blow generally direction via huge holes.

Proper compressor
When choosing compressor you need to consider if it can constantly provide desired pressure and volume of air. Small airbrush compressors small compressors boast impressive pressure figures but really poor flow rates adequate limited to airbrush pistols. Actually if small compressor can push enough air it will likely overheat in short while.