¶ Air compressor connection and dry-air cutting
This is shop air. It is not nitrogen and it is not oxygen. Gweike’s 3 kW / 1.5 MPa compressor video is how they hook their box to the air circuit. If your compressor cannot hold pressure while the nozzle is flowing, the tank gauge between jobs is a lie.
¶ What the official video is doing
- Place the compressor on a stable, ventilated floor with drain access.
- Connect the hose to the documented air inlet, not to a nitrogen or oxygen fitting.
- Power the compressor on its own circuit; it is not a USB accessory.
- Drain condensate. Water in the line clouds windows and wrecks cuts.
¶ How this interacts with process rows
Gweike’s published CNC parameter article treats air at about 6 bar at the head as a cheaper alternative to nitrogen for some thin-sheet rows. It is a different library row (lower frequency in their tables) and leaves a more oxidized edge. Do not open the air valve while mLaser still has an N2 or O2 row loaded and expect the same edge.
1.5 MPa at the compressor (15 bar) is not the same number as 6 bar at the head. Regulator, hose length, and leaks sit in between. Measure at the head if a dry-air row fails.
Oxygen cutting of carbon steel is a different gas path and a fire process. Do not feed the oxygen circuit from this compressor.
Related: gas guide, utilities, parameter library.