Runout sensor

thingiverse

Filament Runout sensor/switch. This micro switch is designed for a 19mm x 6mm size, but the one I used had a different lever tip - no curved tip in sight. However, it works flawlessly, and you may need to curve or shorten the lever as needed. To assemble this unit, print two identical parts: one regular and one mirrored copy. Once printed, simply put them together and start using the sensor/switch.