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