Dimensional limits that prevent failures
Tolerance on 1–30mm features
Resolution these guidelines are tested at
Every value backed by Formlabs test data
A wall connected to others on two or more sides. Thinner walls risk warping under peel forces.
A wall connected on fewer than two sides. Below this, expect warping or full detachment.
Beyond this length, a horizontal feature won't fully form without added support structures.
Shallower angles risk breaking off during the peel step of printing.
The maximum distance between two supports for a 5×3 mm beam before failure becomes likely.
0.3 mm supports up to 7 mm of height; 0.6 mm supports up to 30 mm before deforming.
Raised surface details like text or logos smaller than this may not be visible on the finished part.
Recessed details narrower or shallower than this may fuse with the surrounding surface.
The gap needed between two moving or mating parts (like gear teeth) to avoid fusing together.
Holes smaller than this in any axis risk closing over during printing.
Required on fully enclosed cavities so trapped resin can escape and avoid a cupping blowout.
| Feature Size | Tolerance | Lower Limit |
|---|---|---|
| 1–30 mm | ±0.15% | ±0.02 mm |
| 31–80 mm | ±0.2% | ±0.06 mm |
| 81–150 mm | ±0.3% | ±0.15 mm |
| Feature | Intended Size | Form 4 Actual | Form 3 Actual |
|---|---|---|---|
| Min. supported wall | 0.2 mm | 0.17 mm | 0.25 mm |
| Min. unsupported wall | 0.2 mm | 0.18 mm | 0.26 mm |
| Max. unsupported overhang | 5.0 mm | 5.00 mm | 5.03 mm |
| Min. vertical wire (7mm) | 0.3 mm | 0.20 mm | 0.35 mm |
| Min. embossed detail | 0.1 mm | 0.13 mm | 0.24 mm |
| Min. hole diameter | 0.5 mm | 0.42 mm | 0.26 mm |
| Min. drain hole | 0.75 mm | 0.91 mm | 0.90 mm |
