Indirect Duet Laser filament monitor

thingiverse

This is my version of indirect laser filament monitoring, using Duet Laser filament sensor. I was inspired by this one: https://www.thingiverse.com/thing:4341389 But wanted to use a bondtech gear and different bearings. Also the U shape bearing is now free to move in the latch, and tensionning can be adjusted using thumb screw.. Reprap 3.x firmware config: M591 D0 P5 C"e0_stop" R75:125 E3.0 S1 A1 L0.406 => measured min 85% avg 98% max 115% over 47233.3mm Updates: - 14/06/21: . updated Case_Bottom and Latch. Now use a collar clip on the input side. - 12/06/21: . fix laser sensor in the wrong direction . added a hole to insert transparent filament part for the led. . added a new printed part on the 5mm shaft for the laser reading. Parts needed: 4 x Socket Cap Headscrew M3x20mm 2 x Socket Cap Headscrew M3x6mm 6 x M3 nuts 1 x Socket Cap Headscrew M4x8 mm 1 x bondtech drive gear for 1.75mm filament 5mm shaft 1 x 3mm x 19-20mm shaft ( provided with bondtech gears usually ) 1 x 5mm x 27mm shaft ( Carbon rod, or painted aluminium rod ) 1 x M3 thumbscrew , Spring and nylon washer ( https://www.3djake.com/bondtech/thumbscrew ) 1 x M3x4mm heat insert 1 x U604 4x12x4mm U shape bearings 2 x MR115ZZ 5x11x4mm bearings 1 Duet Laser filament monitor 1 x M6 Press Fit PTFE coupler 1 x PTFE collet clip coupler some PTFE tubes a piece of clear transparent 1.75mm filament ( for the led )