3D Systems ProX 950

The 3D Systems ProX 950 is an SLA 3D printer from 3D Systems with a 1500 x 750 x 550 mm build volume.

Specifications

3D Systems ProX 950: Technical Brief

Light Source / Laser

The ProX 950 uses a 355 nm UV laser integrated into the proprietary PolyRay print head: an innovative system that traverses the beam mechanically along the X-axis, achieving up to 10× faster speeds than previous 3D Systems SLA machines.

Optics / Scanner

The PolyRay print head combines galvanometer scanning along the Y-axis with mechanical translation along the X-axis. This approach maintains accuracy across the full 1500 mm X-span without the XY distortion that would afflict a pure galvanometer system at this scale.

Platform

Build platform 1500 × 750 mm: among the largest in the production SLA segment.

Calibration

ProX 950 Calibration

Given the extraordinary 1.5 m X-axis span, calibration requires a dedicated approach:

• PolyRay initialisation: 60 min warm-up; the system verifies optical components and X-axis mechanical travel. Expected: green status with no warnings.
• 1500 mm levelling: use a laser level or precision inclinometer. Deviation under 0.2 mm along the full length. Even small frame deformation (from resin weight or temperature) is significant at 1.5 m.

3.

Common defects

Common ProX 950 Defects

Zonal dimensional non-uniformity: parts printed at the ends of the 1500 mm X-axis have different dimensions from those at centre. Cause: thermal expansion of the X-axis or stitching errors. Fix: recalibrate zonal parameters; control room temperature.

Warping of large monolithic parts: corners lifting during cooling. Cause: massive residual cure stresses. Fix: angled orientation; additional vertical supports with larger contact diameter.

What it is used for

Applications

Best suited for:

• Full-scale automotive parts: bumpers, hoods, sills: 1500 mm accommodates most components without assembly.
• Investment casting master patterns at full scale: Accura CastPro.
• Large aerospace functional prototypes: Accura Xtreme and Accura 60.
• Production tooling: thermoforming, vacuum forming, master patterns for moulds.

Poor fit for:.