Ender 3 Z endswitch as runout sensor
Description
Because I am using BLTouch on Ender 3, original Z endstop switch can be used as filament runout sensor. Design of holder also work well as filanent guide. Printed from PETG with 100% infill. Use M3 tap and make threads into 2 holes for PCB screws. It is necessarily to use 2mm drill and calibrate filament hole.
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