Encoders are an electromechanical sensing device primarily used for sensing position. They are available in either a “linear” or “rotary” construction. A rotary encoder that is mounted on a motor shaft can used to precisely position the motor or be used to control velocity. The encoder, tracks the turning of motor shafts to generate a digital “pulse” output to give a position feedback to a motor controller. Whether incremental or absolute, magnetic, resistive or optical, rotary encoders track motor shaft rotation to generate digital position and motion information. Today, encoders are common place in all facets of manufacturing and automation.
Rotary encoders are available in two distinct families, incremental and absolute. The absolute encoder utilizes multiple detectors and tracks for position sensing at all times so, a specific position is not lost.
Most modern encoders use either magnetic disc (hals) or optical disc (LED). Using an LED light source that passes through a convex lens and pass through a grid diaphragm, now creates multiple channels in a light/dark state. Since many different channels can now be produced the signals can be processed by pulses, direction, and speed.
Today, most manufacturers of AC and DC motors offer encoders mounted, in just about any resolution as an option to their customers.
If you would like to have us prepare a competitive quote on encoders, please contact one of our sales representatives or contact our office directly at (949) 369-8000.