Filament cleaner with jam sensor

Compact filament cleaner for mounting on a side of your printer, with holder of PTFE pipe and sensor for detection of jammed / ended filament.
For cleaning of filament I recommend to use part of sponge curlpapers (found in wife/girl/mother's cosmetics or to buy in any drugstore, if you don't want to risk ;) ), it has right diameter and useful axial hole ideal for filament.
For making a sensor you need some other things except printed body:
- 2x bearing 623 (3x10x4mm)
- 2x steel axle fi3mm (I used plain part of old drill 3.0mm)
- bottom roll, it can be plastic/metal/anything but I recommend to do it of teflon. Diameter: 6mm, but important is to do a groove around, without it sliding resistance is too high.
- upper roll, it is just a pinch roll from old tape recorder, drilled for 3mm axle. Diameter of roll used by me: 9mm
- hall sensor: I recommend TLE4905, but it can be any other unipolar.
- 4x neodymium magnet fi3x2mm
- plastic disk for these magnets. In my case it is made