Filament Runout Sensor (Ball bearing)
cults3d
Other projects: https://www.instagram.com/engineeringns/ This runout sensor utilizes two ball bearings to prevent any wear and tear, it also enables the filament to be fed from both sides so that the printer can automatically eject it after the switch detects a runout condition. Bearings: 3mm-ID, 8mm-OD, x 3mm thick 5mm-ID, 8mm-OD, x 2.5mm thick https://www.amazon.com/5x8x2-5mm-Rubber-Shielded-Bearings-MR85-2RS/dp/B019I3PGWG/ref=sr_1_3?ie=UTF8&qid=1546484223&sr=8-3&keywords=5x8x2.5
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