ROUNDSS Encoder CE Approved 100PPR Handwheel Encoder 

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Principle of Incremental Encoder

An incremental rotary encoder provides cyclical outputs (only) when the encoder is rotated. The incremental rotary encoder is the most widely used of all rotary encoders due to its low cost and ability to provide signals that can be easily interpreted to provide motion related information such as position and velocity. 

Optical encoders use light (optics) to identify unique positions for the encoder. Optical encoder engines can be amazingly precise, with some designs hitting 4 million counts per revolution. This makes an optical encoder a desirable choice where resolution matters, from office equipment like computer mice and copiers to medical equipment. With phased-array technology, an optical encoder is increasingly able to perform in much tougher environments which require a combination of durability and resolution, like crane operations and automated vehicle guidance.

cnc handwheel mpg

Rongde  Optics offers a full range of Manual Pulse Generators (also called MPG, Hand Wheels and Handy Encoders) as well as complete Handheld Pendants with a variety of configuration options.
 

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.