I'm using Rhino 5 in combination with Boltgen to create threads and screws. Boltgen is a free plugin to create either screws or threadcutters.
Boltgen can be downloaded either
After creating a threadcutter, in my case a 10mm M6-1 (Std) threadcutter, you need to rescale the threadcutter with the option threadcutter-scaler a little bit.
Material: Z-Ultrat, 0.19 layer, rescaled to:
- 1.15 - screw is going easily through the thread.
- 1.10 - screw has a little resistance
- 1.08 - screw has more resistance, like a self-locking nut.
A .zcode file / 3dm file and some pics will follow...