The build chamber is the container into which the Fuse 1 deposits powder. That powder is then sintered into solid parts or left loose to support parts as they print. Be sure to inspect, clean, and store the build chamber properly between each print.

Check that the build chamber is in good condition between prints:

• Inspect the gasket on the top surface of the build chamber for tears.
• Gently lift the edge of the gasket and ensure that the seal under it is undamaged.
• Check the build plate for any debris.
• Inspect the build chamber plug and ensure it is free of debris before plugging it into the Fuse 1 or Fuse Sift.

Build chambers are mechanical devices and have moving parts that wear over time. Contact Formlabs Support or your certified service provider if your build chamber is making unusual noises during a print, is not detected by the printer, or otherwise not functioning properly.

To prevent loose powder from becoming airborne, vacuum the top of the build chamber before storing empty build chambers outside of the Fuse 1 or Fuse Sift.

If the build chamber plug is contaminated or build chamber-related errors occur, clean the plug on both the build chamber and on the corresponding Fuse 1 generation printer or Fuse Sift. Use compressed air to blow out any powder from the plugs. Inspect the plugs carefully and apply a small amount of contact cleaner if any contamination remains visible.

If you need to clean all powder out of a build chamber, such as when switching powder types, follow the instructions in this guide.

The printer automatically tracks maintenance tasks and alerts you to overdue, upcoming, and future maintenance tasks. Included in those are build chamber maintenance tasks.

After 500 hours of printing:

• Vacuum the build chamber felt seal

After 1,000 hours of printing:

• Replace the build chamber inner gasket (volcano sheet seal) [EN] [DE] [ES] [FR] [IT] [JA] [ZH]
• Replace the build chamber external frame gasket [EN] [DE] [ES] [FR] [IT] [JA] [ZH]
• Lubricate the build chamber lead screw [EN] [DE] [ES] [FR] [IT] [JA] [ZH]

Certain troubleshooting steps may also require build chamber maintenance:

• If you experience layer shifting and have ruled out issues with the printer’s Z-drive, your print settings, and the assembly of the print bed, you may need to tighten the screws in the build chamber piston arm.

For more information on printer and build chamber maintenance, see Schedule of maintenance (Fuse 1 generation).

Between prints, store empty build chambers in the Fuse 1, Fuse Sift, or on a sturdy flat surface. To prevent powder contamination that can lead to failed prints, avoid storing build chambers in areas where dust or other debris may settle.