Sintratec S2

The Sintratec S2 is an SLS 3D printer from Sintratec AG with a 160 x 160 x 400 mm build volume.

Specifications

Sintratec S2: Technical Overview

Technology and Laser Source

The Sintratec S2 uses Selective Laser Sintering (SLS), where a CO₂ laser scans a polymer powder bed and fuses it layer by layer. Galvanometric mirrors direct the beam for fast, precise scanning.

Modular All-Material Platform (AMP)

The S2's defining feature is its split architecture: the Fusion Module (FM), containing the laser, optics, and electronics, is physically separated from the Material Changing Unit (MCU), which contacts the powder. The Fusion Module is purchased once; MCUs are swapped per material or to enable parallel build workflows.

Build Volume and Modularity.

Calibration

Sintratec S2: Calibration

1. Heating Zone Stabilisation

Before loading powder, run the heating cycle without the MCU for 30 minutes. The goal is for all 8 heating zones to reach a uniform temperature within ±2 °C. Expected result: stable platform temperature within the target range for the selected material (e.g., 160–175 °C for PA12).

2. Powder Level and Moisture Check

Verify the powder is dry (moisture <0.1%) before loading the MCU. Dry at 80 °C for 4–8 hours if in doubt.

Common defects

Sintratec S2, Common Defects and Remediation

Warping

The most common SLS issue, parts curve after cooling, especially long flat profiles. Cause: uneven or too-rapid cooling, or poor part orientation. Fix: extend the cooling cycle; orient parts so the smallest cross-section faces the XY plane; ensure a uniform powder envelope around the part.

Orange Peel Surface

A rough, uneven surface resembling orange peel.

What it is used for

Sintratec S2: Use Cases

Suitable Applications

R&D and Universities: The modular architecture and entry price of ~€33,000 make the S2 a realistic choice for academic and research environments. SLS produces support-free, isotropic PA12 functional prototypes that speed up design iteration.