CR-10 v2 or v3 Y-aligned Filament Sensor Bracket

thingiverse

NOTE: I did a 350mm print with this and there are serious issues with it and the stock sensor. The two main issues with this is that it's too low, interfering with the extruder at the top of the build volume, and it's not strong enough in PETG to resist the lateral forces exerted on the sensor or near the top. The filament sensor itself has an issue with the copper lining digging into the filament at angles. over about 40° from vertical. Making it taller and thicker is easy enough, to work around the sensor, I plan to run the filament through a pair of 608 bearings to get the tension off the copper tube in the sensor. After that, I plan to design a new sensor housing that uses PTFE tubing instead of copper so it won't cut into the filament at higher angles. I created this to go along with [my spool holder](https://www.thingiverse.com/thing:4599059). It slides into the top crossbar and the filament sensor screws onto it. This should line up reasonably well with a direct drive extruder, so the filament is only pulled in the X axis. I've also put a hook on the back for a retracting line I use for cable management. I considered having this slide into both the top and front V-slots, but there should never be very much strain on this part. It currently has some slop because of how short the extrusion is. This shouldn't matter, but if you want to fix it, you should be able to extend the extrusion then tie it back into the plate pretty easily. The stock screws will self-tap into PETG pretty easily. I would assume it works with PLA too (maybe even better), but haven't tried it.