UnionTech RSPro 2100

The UnionTech RSPro 2100 is an SLA 3D printer from UnionTech.

Specifications

Laser and Optics

The RSPro 2100 features a multi-laser 355 nm array with multiple independent UV lasers and galvanometric scanners, each covering a zone of the 2100 mm platform. Minimum spot size is within the industrial RSPro-series standard (~0.08–0.15 mm).

Platform

Marble Z-axis platform with ball-screw drive; the 2230 kg machine weight requires a reinforced floor slab. The platform is configured for automatic levelling along the long axis.

Build Volume

2100 × 700 × 800 mm: claimed world's largest commercially available SLA envelope as of 2020.

Accuracy

±0.2 mm for features under 100 mm; ±0.2% of dimension for longer geometries along the 2.1 m axis.

Calibration

Multi-Laser Stitching Across 2.1 m

Calibrate each scanner separately, then run a cross-zone test with a part longer than 1500 mm. Target: seam under 0.2 mm visually and dimensionally. Thermal drift in the 2.1 m frame requires weekly re-verification or after a room temperature change exceeding 3 °C.

Nine-Point Z-Levelling

Use a precision level and dial indicator; adjust via spindle only: no shimming. Target: parallelism ≤0.08 mm along the length, ≤0.05 mm across.

Common defects

Zone Seams on Parts Longer Than 600 mm

Thermal drift of galvanometer during long prints. Fix: stitching calibration plus climate control to ±1 °C.

Warping of Flat Panels Wider Than 500 mm

Uneven UV coverage over large cross-sections. Fix: add ribs in build preparation; staged post-cure with fixturing.

Layer Separation in Cold Resin (below 20 °C)

High viscosity prevents even spreading. Fix: heat room to ≥22 °C; increase inter-layer pause.

Z Inaccuracy with Heavy Parts.

What it is used for

Full-Scale Automotive Studio Models

OEM design-approval single-piece bodies without segment bonding.

Aerospace Investment Casting Patterns

Castable resins for turbine housings and complex structural castings.

Wind-Tunnel Prototypes

Aerodynamic models at 1:1 or 1:2 scale with no seams.

Full-Scale Marine Patterns

Yacht hulls, blades, and marine architectural forms.