Form 4L
Formlabs Form 4L
Blazing Fast Large-Format Resin 3D Printer
The Formlabs Form 4L is a large-format industrial resin 3D printer powered by Low Force Display™ (LFD) technology. It delivers high-speed, precise, and reliable prints—completing full builds in under six hours. Ideal for automotive, aerospace, and manufacturing, it supports a wide range of engineering and specialty materials, making it a seamless fit for production workflows.
Key Features of Form 4L
Large Build Volume
35.3 × 19.6 × 35.0 cm—4.6× bigger than Form 4, ideal for large parts or batch production.
Blazing Speed
Completes full builds in under 6 hours, with up to 80 mm/hr print speed.
High Reliability
Intelligent controls, durable consumables, and an integrated camera for remote monitoring.
Exceptional Quality
46 µm XY resolution, ±0.15% accuracy, sharp details, and smooth injection-molded finishes.
Material Versatility
Works with 37+ Formlabs resins (ESD, FR, engineering) plus third-party options via Open Material Mode.
Precision at Scale
Maintains accuracy and surface finish across large prints.
User-Friendly
Simple four-step workflow; easy to learn in 15 minutes.
LFD™ Technology
Delivers speed, consistency, and high output for industrial-grade production.
Technical Specifications
| Category | Details |
|---|---|
| Technology | Masked Stereolithography (MSLA) |
| Printer Engine | Low Force Display™ (LFD) |
| Key Engine Components | Backlight Unit, Light Processing Unit 4L (LPU 4L), Release Texture, Flexible Film Resin Tank, Intelligent Control Systems, Automatic Resin Handling |
| Light Source | 145 uniform-wavelength LEDs with plano-convex lens array + air cooling; 405 nm wavelength; 16 mW/cm² intensity at cure plane; 46 µm pixel size |
| Print Speed (Max.) | 80 mm/hr (3.1 in/hr) |
| Print Speed (Typical) | Avg: 24 mm/hr (0.9 in/hr); Range: 20–35 mm/hr (0.8–1.4 in/hr) depending on material |
| Dimensional Tolerances (XY) | 1–30 mm: ±0.15% (min ±0.02 mm); 31–80 mm: ±0.3% (min ±0.06 mm); 81–150 mm: ±0.3% (min ±0.15 mm) |
| Surface Accuracy (Precision Model Resin) | 99.9% surfaces within 100 μm; 96.7% within 50 μm; 71.4% within 25 μm |
| Reliability | Testing in progress |
| Materials | 19 Formlabs resins + third-party (Open Material Mode); new materials in development |
| Biocompatible Materials | Not available (Form 4BL only) |
| Build Volume (W × D × H) | 35.3 × 19.6 × 35.0 cm (13.9 × 7.7 × 13.8 in) – 24.2 L |
| Build Area | 692 cm² (107 in²) |
| Maximum Part Length | Not measured |
| XY Resolution | 46 µm with pre-tuned anti-aliasing (subpixel resolution) |
| Layer Thickness | 25–200 µm (0.001–0.008 in) |
| Resin Cartridges | 2 |
| Resin Cartridge Type | Next-gen cartridge: 5–10× faster filling, 63% less waste, 30% less shelf space |
| Resin Heating | High-speed conduction heating with infrared sensing |
| Internal Temperature | Auto-heats resin: 25–45 °C (77–113 °F) |
| Force Sensing | Z-Axis Force Sensor (auto-optimizes print quality & speed) |
| Supports | Auto-generated; Light-touch removal |
| Printer Dimensions (W × D × H) | 66.4 × 52.8 × 79.4 cm (26.1 × 20.8 × 31.3 in) |
| Minimum Access Dimensions | 88.9 × 116.9 × 81.3 cm (35 × 46 × 32 in) |
| Weight | 58.5 kg (129 lb) |
| Operating Environment | 18–28 °C (64–82 °F) |
| Power Requirements | 100–240 VAC, 9 A, 50/60 Hz, 900 W |
| Connectivity | Wi-Fi (2.4/5 GHz IEEE 802.11 b/g/n/ac, WPA/WPA2), Ethernet (1000 Mbit), USB-C 2.0 |
| Control | 7″ touchscreen (1280 × 800); Languages: EN, DE, FR, ES, IT, JP, ZH-Simplified |
| Alerts | Touchscreen, SMS/email via Dashboard, Audio alerts |
| Sensors & Control Systems | Resin heating with infrared sensing, Ultrasonic resin level sense, Z-Axis Force Sensor, Resin cartridge load cell, Printer leveling sensor, Integrated 5MP camera (2592 × 1944) for monitoring/history/timelapse |
| Software | PreForm & Dashboard |
| PreForm Requirements | Windows 10+ (64-bit), macOS 10.15+; OpenGL 2.1; 4 GB RAM (8 GB recommended) |
| Supported File Types | Input: STL, OBJ, 3MF; Output: FORM |
| PreForm Features | One-Click Print, Adaptive layers, Remote Print, Auto-orient, Auto-mesh repair, Auto/manual supports, Rotate/scale/mirror, Layer slicer, Custom print settings |
| Dashboard Features | Cloud print management, Resin/tank tracking, SMS/email alerts, Enterprise group accounts |
| Resin Tank Lifetime | 75,000+ layers (~190 prints, avg. 39 mm model at 100 µm) |
| LPU Lifetime | 600k–1.9M layers (~1,300 prints, avg. 87 mm model with Grey Resin V5 at 100 µm) |
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