Rosetta Handwheel encoder

CNC Machine Handwheel Encoder.

Manual pulse generators are typically rotating knobs that generate electrical pulses.  They are normally associated with computer numerically controlled (CNC) machinery or other devices involving positioning.  When the pulse generator sends an electrical pulse to an equipment controller, the controller then moves a piece of equipment a predetermined distance with every pulse.

Optical encoders use a light source and a photo detector array to read the optical pattern of a plastic or glass disc and translate the pattern into a position data code.