Filament Winder with linear rail (clean winding) Filawinder

A Filament Winder with a linear rail. Winds cleaner than the usual one. Uses a stepper for winding, thus allowing to count rounds and easy adjust speed. Uses dirt-cheap optical Endstops for the winding instead of a laser. (Makes it probably harder doing the horizontal extruding - never tried).

It' using Parts of the official Filawinder and, some upgrade gears form here https://www.thingiverse.com/thing:707993.

Pictures shows an alu frame, but only one boom (2020) is really necessary because it's the linear rail.

Two endstops, slideable attached to the rail, can be used to adjust the width of the spool.

You need:
2 x Nema 17
4 x optical Endstop
1 x Arduino Uno
1 x Arduino Uno CNC Shield
2 x Stepper driver (sometimes included in the cnc shield)
1 x Small StepDown Module (LM 2596. You can use of course a different one, but the box is build for that)
1 x 12 V power supply
4 x 5237mm Nylon Plastic Carbon Steel Bearings Pulley Wheels Embedded Groove Ball Bearings (https://www.banggood.com/10pcs-5237mm-Nylon-Plastic-Carbon-Steel-Bearings-Pulley-Wheels-Embedded-Groove-Ball-Bearings-p-1094058.html?rmmds=detail-left-hotproducts__2&HotRecToken=ChM4ODYzNzA5NjkzODIxOTI5MjE3EAIaAklWIgJQRCgA&cur_warehouse=CN)
1 x short piece of gt2 belt, around 30 cm will do
2 xGT2 Pulley 16 Teeth Bore 5MM
1x Profile 2020 ca. 30 cm for the linear rail
(If you want the same setup I have, you need additioinally:
1 x 2020 ca. 30 cm
2 x 2040 ca. 40 cm
(this measures are not special, I took what I had on stack)
20 nutstones with M4
)

The optical Endstops for the winding must be connected to one of the analogue inputs and then read out via Analog Read. The Programm tends to adjust winding speed to struder speed witch might work not well if your struder changes speed. (In that case, set a higher minimum speed. But don't be to hasty - speed will rise, if the winding takes to long before the next waiting brake).

The optical endstops on the linear rail can be connected conventionally - Endstop-plugs of the cnc shield. They're attached slidebal onto the rail. You can adjust the winder to the width of the spool.

As you can see in the last picture, a gt2 timing beld is layed into the V Slot and is used for driving the carriage. It's held there by the wheels (and have to be fixed at the ends) and is wrapped around the 16 teeth-belt pulley.

There are differences to some of the stls on the picture: This is the ptfe-tube-holder (guidance bridge wich should have a better grip on the ptfe-tube than the thing on the photo) and the housing, wich does not seperate anymore between the arduino and the stepdown. And I'm not quite sure about the driving wheel. I hope it is the one...)

After starting the program, the carriage will do the homing. Try to move some filament through the Endstop start and stop the winding.