Wematter Gravity

The Wematter Gravity is an SLS 3D printer from Wematter with a 300 x 300 x 300 mm build volume.

Specifications

Laser: CO₂ laser: the standard technology for SLS of nylon-based powders; exact power not publicly disclosed by Wematter, but in the class range (~30–50W).

Optics/Scanner: Galvanometer scanner for precise beam steering across a 300×300 mm build area.

Platform: 300×300×300 mm sintering platform; minimum layer 60 µm.

Chamber: Actively heated chamber with HEPA + active carbon filter; CE-marked for office safety; up to ~200°C; no nitrogen inert atmosphere.

Build Volume: 300×300×300 mm; footprint under 1 m²; passes through standard doorway.

Power: Standard single-phase supply: no three-phase installation required.

Calibration

Warm-up: 45–60 min for chamber stabilisation at ~180–190°C for PA12; larger volume = longer warm-up.

CO₂ laser: Periodic power check: CO₂ tubes degrade over time; corner parts are an early indicator.

HEPA filtration: Preventive replacement on schedule; degraded filters = powder particles in the room.

Recoater: Sieve powder; visual check at start; 300×300 platform amplifies the effect of an uneven layer.

Common defects

Warping: Thermal gradient in large chamber → tilt parts 45°; slow cooling mode.

Orange-peel: Agglomerates in recycled powder → sieve regularly; maintain recoater mechanism.

Porosity (undercure): Reduced laser power over time → periodic check; update profile in Deep Space.

Recoating streaks: Caked powder on roller → clean before each job.

What it is used for

Office-based teams: The only CO₂ SLS with HEPA + single-phase power: no dedicated room required.

PA12/TPU small batches: 300×300×300 mm with 18+ materials: diverse applications from prototypes to end-use parts.

Medical and dental prototyping: CE marking and HEPA filtration for environments with air-quality requirements.