CR10 or CR-10 vertical low filament guide

thingiverse

My CR10 came with a convenient filament sensor that pauses printing when the filament runs out. I wanted to mount my spool holder on top of the frame, which was a breeze, but then the filament ran vertically straight down to the filament sensor, causing issues with its horizontal channel for the filament. This resulted in it pulling the sensor off the extruder bracket. I managed to get hold of the STL file for the filament sensor housing and reworked it. I had several attempts before getting it right; I wanted to guide the filament out of the sensor housing through 90 degrees into the extruder. I tried a curved surface, but was worried about excessive friction. To reduce friction, I designed a small pull wheel and added a spindle to the bracket. I had to move the entire assembly slightly to avoid the Z screw and raised the sensor housing high enough to clear the wheel. If you have this sensor, you can remove the lid of the existing housing by unscrewing it, then undo the two screws holding the small PCB in place. Next, screw the PCB into the vertical case. The old lid may fit, but if it's a bit tight against the bracket, I modified the STL file to reduce its size along that edge. I created this design using Tinkercad, which you can edit online at https://www.tinkercad.com/things/lktY3KaPRoV.