K22 incremental encoder Miniature optical encoder resolution 1024ppr hollow shaft encoder 6.5mm hole line driver circuit 5-30V

--Professional working team

--Over 19 years encoder production experience

--High quality standard

--Perfect service with quick response

--Own brand and unique brand

--More than 20 years experienced engineers

--CE certification for all models

--Utility model patent certificate

--Prompt delivery date

--100% full inspection before shipment

Shipment: Goods can shipped via TNT, FedEx, UPS, DHL, EMS, etc.

Applications: Remote control, Printing machinery, Projector, Injection molding machine, Disc shoe machine, Textile dyeing, Leather machine, Paper equipment, etc.

What is quadrature encoder?   

A quadrature encoder is an incremental encoder with 2 out-of-phase output channels used in many general automation applications where sensing the direction of movement is required. Each channel provides a specific number of equally spaced pulses per revolution (PPR) and the direction of motion is detected by the phase relationship of one channel leading or trailing the other channel. 

How do  quadrature encoders work?

The code disk inside a quadrature encoder contains two tracks usually denoted Channel A and Channel B. These tracks or channels are coded ninety electrical degrees out of phase, as indicated in the image below, and this is the key design element that will provide the quadrature encoder its functionality. In applications where direction sensing is required, a controller can determine direction of movement based on the phase relationship between Channels A and B. As illustrated in the figure below, when the quadrature encoder is rotating in a clockwise direction its signal will show Channel A leading Channel B, and the reverse will happen when the quadrature encoder rotates counterclockwise.

How do  quadrature encoders work?

Apart from direction, position can also be monitored with a quadrature encoder by producing another signal known as the “marker”, “index” or “Z channel”. This Z signal, produced once per complete revolution of the quadrature encoder, is often used to locate a specific position during a 360° revolution.