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Optical Filament runout sensor — image 1
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Optical Filament runout sensor

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Optical Filament runout sensor for the BMG extruder

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Creative Commons — Attribution — Noncommercial

Uses the optical sensor to detect filament.
require: 2x10mm M3 screw and 2xM3 Heated inserts

I design it for the bowden bondtech bmg extruder. If mounting directly to 2020 extrusion then longer screws and might not require heated inserts.

NOTE: since this is a light sensor, this will only work with filament that is not transparent

Include the step file if you want to remix it 

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