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ERN 1387

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The Heidenhain ERN 1387 is a rotary encoder with integral bearing and stator-mounted coupling.

The stator coupling compensates for play between the motor and the rotary encoder, reliably correcting inaccuracy, compensating for axial play as well as even tilt. The tapered shaft allows the rotary encoder to be directly coupled to the mating shaft without the need for additional rotor coupling. The resulting high rigidity permits higher bandwidths in the control loop, reduces inaccuracy, and simplifies installation.


Along with incremental output signals, the rotary encoders of this series also output sinusoidal or block commutation signals for direct commutation control. No additional Hall sensors are needed for motor control. Possible applications range from simple measuring tasks to position and speed control on servo drives.

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