Rotary Encoders

HEIDENHAIN Rotary Encoders

Accurate position and speed for every shaft

A rotary encoder measures the angle and speed of a turning shaft and sends it to your control, drive, or readout. HEIDENHAIN rotary encoders are known for quality, durability, and precision, and their rugged, easy-to-install design has made them a standard on machines and motors around the world.

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Motor feedbackPosition and speed feedback on servo drives and electric motors.View motor feedback encoders → Machine toolsSpindles, rotary tables, and handwheels.View machine tool encoders → AutomationAutomation equipment, robotics, and general machinery.View automation encoders →

How to choose

External or internalExternal encoders mount onto machines and motors (up to IP66, up to 100°C). Internal encoders build into motor housings and handle high vibration (up to 120°C, IP40).External Internal

Absolute or incrementalAbsolute encoders (ECN, EQN, ROC, ROQ, ECI, EQI, KCI) know their position at power-up. Incremental encoders (ERN, ROD, ERO) count from a reference mark.Absolute Incremental

Singleturn or multiturnEQN, ROQ, EQI, and EBI models also count full revolutions.Singleturn Multiturn

Shaft and mountingHollow shaft with stator coupling (ECN/ERN), solid shaft with a separate coupling (ROC/ROD), or no integral bearing (ECI/ERO/KCI).