Filament Runout Sensor / Filament guide
thingiverse
Nothing too special here. It's just a combination of 2 pre-existing upgrades, the filament runout sensor and the filament guide. If you don't have either already then you'll get 2 upgrades at the same time. I added holes in the sensor part for the cheap M3 brass threaded inserts. The pic shows that my printer is using the Z Belt upgrade, but the parts will fit this to a standard stock printer: https://www.thingiverse.com/thing:4243512 If you also have the Z Belt upgrade, then you can find the remixed shaft support here: https://www.thingiverse.com/thing:5926783
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