What is quadrature encoding, and why is it important in incremental encoders?

Quadrature encoding is a method used in incremental encoders where two output signals (channels A and B) are generated with a phase difference of 90 degrees. This phase shift allows the system to detect the direction of rotation by comparing the leading or lagging signal. It also helps in determining the speed and distance of movement. Quadrature encoding is crucial because it increases resolution—by detecting all the rising and falling edges of both signals, the system can achieve a 4x multiplication of the original resolution, leading to finer positional control. This makes it an essential technology for precision motion control in industries like robotics and CNC machines.