The Fuse X1 requires a supply of compressed nitrogen gas. Formlabs recommends using a nitrogen generator, which takes in power and compressed air and outputs nitrogen to the printer and oxygen to the environment. The nitrogen intake requirements are:

• Concentration: 99.5% or greater

• Nitrogen line fittings: ⅜ NPT (printer-side connector)

• Pressure: >50 PSI (regulated to 50PSI in printer) 

• Continuous flow rate: 0.8 SCFM (22.65 L/min) minimum, 1.0 SCFM recommended

• Gas temperature at machine inlet: 18 ºC or greater

Additionally, the vacuum conveyor for filling the printer with powder requires compressed air. Formlabs recommends using the same compressed air supply for both, running one branch to the nitrogen generator and the other to the vacuum conveyor.

If using a portable air compressor rather than a shop air system, power must be supplied.

With the nitrogen generator set up, the flow into the printer is set with a manual rotameter and pressure regulator.

3. Ensure the rotameter is closed initially by turning the knob clockwise to tighten.

4. Ensure the pressure regulator is closed initially by pulling up on the knob and turning counterclockwise.

5. Connect the outlet of the nitrogen generator to the inlet at the back of the printer using either the provided quick disconnect fitting or a suitable alternative.

6. Loosen the rotameter knob, turning counterclockwise, until the float reaches 48 SCFH (equivalent to 0.8 SCFM).

7. Turn the pressure regulator knob clockwise until it reads 0.3 MPa. Press the knob down.

8. Close the air handling access door. Latch it shut using an 8 mm hex driver.