Spool winder, diameter sensor and cooler

thingiverse

**Superseded by ultimate [V2 Auto/Manual spool winder, diameter sensor and cooler](https://www.thingiverse.com/thing:3958955)** **This version shall not be maintened any more, sorry...** **Updates at BOP, read carefully...** Once assembled my new FelFil extruder I began to design a cheap and affordable spool winder; I had to design a cooler for extruded filament and a digital sensor for filament diameter. You can adjust manually the winder speed, but it can be managed directly from FelFil extruder (or others) speed; read just below. With provided adapter the winder can support almost all spools around. Spool support remixed from [Foreverwinter](http://www.thingiverse.com/thing:1241566)'s one. - [measuring test](https://youtu.be/-DmC_qaGq3w) (accelerated) - [final functional test](https://youtu.be/_JpjYn3FgKo) - [AUTO mode test](https://youtu.be/-4CrEfahBMU) The whole project can be found in Tinkercad.com searching for "FelFil spool winder". **Optional** **For brave of hearts only**, I uploaded a V5 version of firmware introducing the optional AUTO running mode and a remixed case. You'll find a toggle switch to select AUTO or MAN; MAN mode lets you choose desider speed via the potentiometer while AUTO mode takes input PWM signal from extruder to automatically adjust winding speed relying on its extrusion speed. The input pin is defined by "const int Auto_PWM = 47;" and ranges 0-9; you can change pin at your needs. Ratios are based on Felfil's range 0-9; with other extruders I'd advice to keep their output this range, otherwise you have to modify all parameters in section "// ratios:" (good luck!). Furthermore, now the cooler fan speed is proportional to winding speed, utilizing D8 PWM output. New items uploaded: - case_V5 - case_cover_V5 - VARSPEED_V5.ZIP containing all necessary software