Sintratec S3

The Sintratec S3 is an SLS 3D printer from Sintratec AG with a 160 x 160 x 400 mm build volume.

Specifications

Sintratec S3: Technical Overview

Technology and Laser Source

The Sintratec S3 uses Selective Laser Sintering (SLS) with a 30 W fiber laser: the key upgrade over the S2. Fiber lasers offer higher efficiency, longer lifespan, and a more stable beam than CO₂ lasers, resulting in approximately 3× faster sintering speeds.

Modular All-Material Platform (AMP)

The S3 fully retains the S2's modular architecture: the Fusion Module houses the laser and optics; Material Changing Units (MCU) are interchangeable. MCU-160 provides 160 × 160 × 400 mm; MCU-220 expands the volume to 15.2 litres (~220 × 220 mm XY).

Heating and Chamber

8 independent heating zones: identical to the S2.

Calibration

Sintratec S3: Calibration

1. Chamber Stabilisation

Before loading powder, heat the chamber for 30–45 minutes without the MCU. A tighter temperature tolerance (±1.5 °C) is recommended for the S3 due to the more concentrated heat of the fiber laser. Expected result: stable pre-sintering temperature across all 8 zones.

2. Fiber Laser Beam Check

Use the built-in diagnostic tool to verify beam diameter and power uniformity across the scan field.

Common defects

Sintratec S3: Common Defects and Remediation

Warping

The faster sintering of the S3 can cause more pronounced warping in long, flat profiles if cooling is uneven. Fix: extend the cooling cycle; optimise part orientation; ensure a uniform powder envelope.

Over-Sintering

With incorrect power settings, the fiber laser can cause blurred edges or fused adjacent parts. Fix: reduce laser power or increase scan speed; reduce beam spot size for delicate geometries.

Orange Peel Surface.

What it is used for

Sintratec S3: Use Cases

Suitable Applications

Continuous 24/7 Production: The fiber laser and robust AMP frame are designed for uninterrupted production. Swappable MCU modules allow a new build to be loaded immediately after the previous one ends: minimal downtime.