Smallest Motion(Smart) Filament sensor mk2

Description

For now it seems working, future changes on demand/result of long term testing. 6.4.2022 replaced by https://www.thingiverse.com/thing:5342918 5.3.2022 It wil grind through hole and starts slipping in about 100m of PLA. You may try ptfe from both sides or use nylon on body, but I currently working on 3 bearing versión. 3.3.2022 aditional distance of axis 28 tooths encoder instead of 30 (precision 0,45 -> 0.9 in Marlin) filament hole 0.1mm closer to axis PTFE ends before wheel, option add/remove PTFE to both sides - you can have wires to left instead to right 28.2.2022 - fine tunning - added 0,2mm between axis and sensor - I was getting false alarms, tooth encoder base partly covered sensor 28.2.2022 - first mk2 version, currently in testing resolution < 0.5 - you can use 1mm setting in Marlin FW motion sensor section accurate - can detect missed full step. If you get random filament runouts during print, than you have step skip or filament slip at extruder normaly unoticable, I have to increase current from 400mA to 470mA on my extruder to have successful 130mm/s / 1mm runout distance print. you will need: - ir pusa filament sensor (without accessories) - i have 0.1 vesion only, let me know, if 0.4 can be fit - mk8 extruder drive gear http://www.na3d.eu/p/2421/toothed-feed-wheel-mk8 - but sensor is customizable, any with diameter < 10mm will most likely work after customisation. - M3x30(25) screw for axis (+ nylon nut, but works even without it) - M3x20 screw + nut Encoder…