Spool winder, diameter sensor and cooler

thingiverse

I've been working on my new FelFil extruder and I decided to design a cheap and affordable spool winder. I also needed to create a cooler for the extruded filament and a digital sensor for measuring filament diameter. The spool winder can be adjusted manually, but it can also be controlled directly from the FelFil extruder's speed settings. With the provided adapter, the winder can support almost any type of spool. I remixed the spool support design from Foreverwinter's original design on Thingiverse. I created a video showing how to measure and test the winder's performance. The full project can be found in Tinkercad by searching for "FelFil spool winder". For those who are feeling adventurous, I've uploaded a V5 version of the firmware that includes an optional AUTO running mode and a remixed case. This new mode allows you to automatically adjust winding speed based on the extruder's output. To select between AUTO and MAN modes, simply flip the toggle switch. In MAN mode, you can choose your desired winding speed using the potentiometer. In AUTO mode, the winder will automatically adjust its speed based on the extruder's PWM signal. The input pin for this signal is defined as "const int Auto_PWM = 47;" and ranges from 0 to 9. I've also uploaded a new version of the case design, along with a ZIP file containing all the necessary software. Note that you'll need to modify the ratios in the "// ratios:" section if you're using an extruder other than Felfil.