Filament Runout Sensor and Guide - CR10
thingiverse
This is a filament runout sensor mount and guide for the CR10 with a BMG extruder. Runout switch can be purchased on Amazon. https://www.amazon.com/gp/product/B00MFRMFS6/ I tapped the holes of the switch for M3 screws, but you can use M2 with nuts if you want. Uses four M3x12 and one M5x20 with stop nut. I had a spare Y axis V wheel/bearing so I used those parts for the filament guide. The guide wheel slides over the stock wheel. Bolts on the X gantry using the stock bolt and nut. I'm not sure if the Ender 3 uses the same X gantry bracket, but if it does this should work. The PTFE tube between the BMG and the Sensor housing is 33mm long, but yours may vary a bit. Step file is included. Original Onshape document is here: https://cad.onshape.com/documents/69f3108352a5e3b75b0a80c5/w/6e59bc2831a4b6d2ddc63902/e/b592e356f5961a1f046b4b3d
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