Filament cleaner with jam sensor

thingiverse

Compact filament cleaner for mounting on a side of your printer, with holder of PTFE pipe and sensor for detection of jammed or end-of-filament. To clean the filament, use a part of sponge curlpapers found in your wife's, girl's, or mother's cosmetics or purchase from any drugstore. It has the right diameter and useful axial hole ideal for cleaning the filament. To make a sensor, you need some additional parts beyond the printed body: two 623 bearings (3x10x4mm), two steel axles (fi3mm) - I used plain parts of old drills 3.0mm, a bottom roll made of plastic or metal but recommended to be Teflon with a diameter of 6mm and a groove around it for reduced sliding resistance. The upper roll is simply a pinch roll from an old tape recorder drilled for a 3mm axle. The used roll has a diameter of 9mm. A hall sensor such as the TLE4905 but any other unipolar sensor will do. Four neodymium magnets (fi3x2mm) and a plastic disk made from plexi or printed are required. You can also try using more than four magnets for higher resolution. I use this sensor with Repetier, and my configuration is below: define EXT0_JAM_PIN ORIG_X_MAX_PIN; define EXT0_JAM_PULLUP 1; define JAM_STEPS 2944; define JAM_SLOWDOWN_STEPS 4400; define JAM_SLOWDOWN_TO 70; define JAM_ERROR_STEPS 6000; define JAM_MIN_STEPS 30; define JAM_ACTION 1. Connect the sensor as Xmax end-switch, connecting Vcc to Vcc, GND to GND, and Out to Signal input without any other elements.