A well-prepared model saves time and money – the print comes out right the first time. Below are the key rules for FDM printing, which is what we do at KaiForge.
1. File format
Preferably send STL, OBJ or STEP. STL is the most common; STEP keeps the CAD solid and lets us make corrections. Use millimetres and a 1:1 scale.
2. A watertight, valid solid
The mesh must be closed (no holes or self-intersecting faces). Most CAD programs can check a model; if something is wrong, let us know – it can often be repaired.
3. Wall and detail thickness
- Load-bearing walls: preferably at least about 1.2 mm (several nozzle perimeters).
- Tiny details and text: below about 0.5 mm may not reproduce.
- Raised or engraved lettering: about 0.6–1 mm high/deep with a clear sans-serif font.
4. Clearances and fits
When parts must fit together (snap, screw, press-fit), plan a clearance of about 0.2–0.4 mm per side. The exact value depends on the material and geometry – we can print a test sample.
5. Overhangs and orientation
Unsupported overhangs steeper than about 45° need supports, which leave marks. Orient the model so the largest flat face sits on the bed – the print will be stronger and cleaner. Layers are weakest where they separate, so align the part with the loads.
6. Maximum size
The build volume is 400 mm high and 300 × 300 mm base. Larger objects are split into parts with joints and glued.
No model yet?
Describe the idea, send a sketch or photo, or bring an object to be 3D scanned – we will prepare the model.