FS721M

The FS721M is an SLM 3D printer from Farsoon Technologies with a 720 x 420 x 420 mm build volume.

Specifications

Farsoon FS721M: Technical Specifications

Laser Engine: 2 or 4 × 500 W fiber lasers (standard); 8 × 500 W in beta configuration (unveiled TCT Asia 2022). Total laser power up to 4000 W in eight-laser variant.

Scanner: Galvo-scanner system; scan speed up to 10 m/s. Each laser has an independent scanner: enables simultaneous processing of different build zones.

Platform: Elongated build volume 720×420×420 mm with uniform heating to reduce thermal stresses.

Chamber & Inert Gas: Sealed chamber with argon atmosphere; recirculating gas flow with HEPA filtration; integrated breakout and powder filter modules.

Calibration

Calibration Protocol: Farsoon FS721M

1. Multi-Laser Calibration & Overlap Verification: Each laser calibrated individually; overlap zones verified with test patterns and CT analysis. Eight-laser configuration demands precise synchronization: smooth overlap is a critical quality parameter.

2. Elongated X-Axis Leveling (720 mm): Check at minimum 6 points along X; allowable deviation < 50 µm. Verify at chamber operating temperature.

3.

Common defects

Typical Defects, Farsoon FS721M

Porosity in Overlap Zones: Primary risk in multi-laser systems, poor laser synchronization or power drift. Fix: recalibrate laser powers, optimize overlap width and scan strategy.

Solidification Cracking: In Ti-6Al-4V, TA15, and nickel superalloys without adequate platform heating. Fix: activate platform heating, optimize supports and scan speed.

Recoater Collisions: Distorted parts obstruct recoater. Fix: optimize part orientation and supports.

What it is used for

Use Cases: Farsoon FS721M

Serial Aerospace Profile Production: X = 720 mm is ideal for spars, profiles, and elongated rocket components; quad-laser configuration delivers competitive throughput.

Automotive Serial Manufacturing: Simultaneous multi-zone processing with independent lasers enables high throughput for automotive series.