PET filament spool

### EN

This spool is designed specially for DIY PET filament. As one may know this filament is hard and springy and tries to run out from regular spools.

The spool consists of 4 types of parts: A, B, C, D, which may be printed separately or combined (using the corresponding files). Assembly is performed using small self-taping screws.

A and D parts may be printed quicker with less material using special modification models for sparse infill. Recommended settings for sparse infill are

* 10% to 30%
* Triangles or tri-hexagon shape
* 0.7 to 1.0 mm line width

The central hole is large enough (36.5 mm) to fit the default Ender 3 spool holder, other holders were not tested.

I don't recommend printing the spool from PLA since it may not withstand 70° C used for drying PET filament on the spool.

### RU

Эта катушка сделана специально для самодельного PET филамента. Этот материал достаточно жёсткий и упругий, из-за чего пытается размотаться с обычной катушки.

Катушка