What is the first sizing number for a laser-cutting compressor?

Start with the required pressure at the cutting head, then add pressure loss through the dryer, filters, receiver, pipework, and valves.

Why is motor power not enough for selection?

Motor power does not show whether the compressor can provide the required free air delivery under the working pressure and duty cycle.

What should be included in a laser-cutting air package?

A complete package normally includes the compressor, receiver, dryer, precision filters, drains, and suitable pipe diameter.

Engineering insights

How to Size an Air Compressor for Laser Cutting

Laser cutting does not only need a compressor with a large motor. The system has to hold pressure at the cutting head while also delivering clean, dry air through the receiver, dryer, filters, drains, and pipework.

Start with pressure at the cutting head

Confirm the pressure required by the laser source and cutting process, then add pressure loss from the dryer, precision filters, receiver, valves, pipe length, and fittings. A package that looks large enough at the compressor outlet may still fail if the downstream line drops pressure during continuous cutting.

Match air delivery to real duty cycle

Use free air delivery or rated air delivery, not only motor power. Cutting speed, nozzle size, material thickness, and the number of machines running together all change the required flow. If demand changes during the day, a variable-speed screw package can reduce unloaded running and stabilize pressure.

Protect the cutting head with air treatment

Moisture, oil, and particles shorten component life and create unstable cutting quality. Select the dryer capacity, filter grade, automatic drain, receiver size, and maintenance interval together with the compressor instead of treating them as accessories after the machine is ordered.

Questions to answer before quotation

What pressure must be maintained at the cutting head?
How many laser machines run at the same time?
What is the required air delivery under continuous operation?
What dryer, filter, receiver, and piping layout will be used?