Absolute   |  Incremental


MSI TEC is an authorized distributor of Encoder Products Company, a leading global manufacturer of motion sensing devices. They are recognized for producing the most complete line of incremental and absolute rotary encoders in the industry.

An encoder is a sensing device, or an electromechanical feedback device, that converts motion to an electrical signal that can be read from a control device, such as a PLC or counter. Encoders indicate movement from one position to the next position and create signals using different technologies, like optical, mechanical, magnetic and resistive.

Encoders produce two types of signals: incremental or absolute. The  difference between the two is that absolute encoders indicate a change of position and location change relative to shaft rotation. Incremental encoders only indicate that the position has changed, but not the specific position.

We supply encoders that handle the following protocols: PROFINET, EtherCAT, CANopen, SSI Synchronous Serial Interface.

encoder shaft

Absolute Encoders

Absolute encoders provide position information for a rotating shaft. There are also two types of absolute encoders: single turn and multi-turn. Single turn absolute encoders provide information for any increment within one shaft rotation. Multi- turn absolute encoders retain absolute position data over the course of multiple shaft rotations. The encoder provides a unique digital code or bit for each increment of shaft rotation. Multi-turn absolute encoders store turns-counting information for instant retrieval, even after power down. MSI TEC provides single-turn and multi-turn absolute shaft encoders with a variety of housing sizes, shaft diameters, signal types and resolution.

Encoder incremental

Incremental Encoders

Incremental signals provide a series of high and low waves that indicate movement from one position to the next. there is no special indication provided by the encoder to show the specific position, only an indication that the position has changed.

Incremental encoders are available in two basic output types: single channel and quadrature. a single channel encoder, often called a tachometer, is normally used in systems that rotate in only one direction and require simple position and velocity information. Quadrature encoders have dual channels (a and B) phased 90 electrical degrees apart. these two output signals determine the direction or rotation by detecting the leading or lagging signal in their phase relationship. Quadrature encoders provide high speed bi-directional information for complex motion control applications.

How an Encoder Works

DOWNLOAD this whitepaper from Encoder Products Company which explains the basics of how encoders work and how they are used.

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