Rotary filament encoder.
Features internal filament guide.
Customize model with OnShape.
Example usage with SmoothieBoard.
Parts:
1 x HC-020K sensor
3 x 625ZZ bearing
2 x PC4-M6 socket
1 x 5x11(4+7)mm(40T) gear
1 x JST 3-pin connector
1 x 0.7x4.5x14mm spring
4 x 3.5x25mm screw
1 x M5x30mm bolt
1 x M5x4mm nut
Notes:
use thread lock glue on the nut
use black plastic (or paint) for the rotor
HC-020K sensor works at both 3.3V and 5V
Signal:
Gear circumference (C=πD): C=34.55 mm
Rotor pulses (see model): P=30 pulse per turn
Encoder signal rate (E=P/C): E=0.8681 pulse per mm