Optical runout sensor
thingiverse
Optical filament runout sensor: Marlin setting: #define FILAMENT_RUNOUT_SENSOR #if ENABLED(FILAMENT_RUNOUT_SENSOR) #define NUM_RUNOUT_SENSORS 1 // One sensor per extruder, up to one. Define a FIL_RUNOUT#_PIN for each. #define FIL_RUNOUT_INVERTING false //true // Invert the logic of the sensor. //#define FIL_RUNOUT_PULLUP // Use internal pullup for filament runout pins. //#define FIL_RUNOUT_PULLDOWN // Use internal pulldown for filament runout pins. Necessary parts: 4x15 mm soft spring Optical end stop: https://www.aliexpress.com/item/32972342907.html?spm=a2g0o.productlist.0.0.70dc15eebTHpAe&algo_pvid=7a5f3d77-1af8-4a9c-a74f-f17b21c6e8ef&algo_expid=7a5f3d77-1af8-4a9c-a74f-f17b21c6e8ef-0&btsid=0be3743b15880101146a35c52d2a93&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ Optical filament runout sensor requires Marlin setting to be enabled.
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