3D Systems SLA 825 Dual

The 3D Systems SLA 825 Dual is an SLA 3D printer from 3D Systems with a 830 x 830 x 550 mm build volume.

Specifications

3D Systems SLA 825 Dual: Technical Brief

Light Source / Laser

Two solid-state UV lasers at 4 W each, wavelength 355 nm. Both beams operate simultaneously and in synchrony: extending the SLA 750 Dual architecture with higher per-laser power for faster curing over the expanded build area.

Optics / Scanner: HyperScan Technology

Proprietary HyperScan Technology provides dynamic multi-spot beam sizing: for large area fills the laser switches to a larger spot diameter (higher speed); for fine features it contracts to a smaller spot (higher precision): all within a single layer pass.

Platform

Build platform 830 × 830 mm: 22% greater area than SLA 750. Z-travel 550 mm.

Calibration

SLA 825 Dual Calibration

• HyperScan initialisation: on startup the system auto-verifies the dynamic beam-size control parameters. Wait for confirmation without warnings. Allow at least 45 min warm-up for the dual 4 W lasers to reach thermal equilibrium.
• Dual-laser stitching: print a test coupon whose geometry crosses the central stitching zone. Expected: zero visible density difference or surface texture change at the seam. Re-calibrate on any deviation.

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Common defects

Common SLA 825 Dual Defects

Stitching mismatch: narrow bands of different density or texture at the laser stitching zone. Cause: thermal expansion or vibration shifts the galvanometers. Fix: re-calibrate stitching; isolate the machine from vibration sources.

Warping on large flat parts: corners lifting. Cause: accumulated cure stresses. Fix: tilt orientation; add stiffening ribs to large monolithic surfaces.

Resin bubbles / clouding: caused by moisture ingress or degradation.

What it is used for

Applications

Best suited for:

• Large-format aerospace and automotive prototypes: 830 mm build width accommodates most structural parts at full scale.
• High-throughput service bureaus: 25% speed gain over SLA 750 Dual with directly comparable quality.
• High-volume dental laboratories (SLA 825 Dual for Dental configuration).

Poor fit for:.