I'm getting pretty close to running carbon fiber tow through the filament winder that I've been tinkering on for a few months now. I designed it to be assembled entirely from off-the-shelf hardware and 3D printed parts, so it is quick to iterate on the hardware and should be fairly easy for other tinkerers to replicate. I'm currently driving it from an easily available marlin board.
This video shows what it was capable of as of 4/13/22. After a lot of tinkering with both the marlin config and the path planning script I'm writing, it now is able to complete helical winding layers of thread without needing any intervention. There's still some weirdness at the ends of each pass due to the thread wandering on the delivery head, but I'm happy with it so far and think it can be fixed by changing when/how the delivery head tilts.
