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ERN 1020

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The Heidenhain ERN 1020 is an incremental rotary encoder with integral bearing for mounting by stator coupling. The stator coupling compensates for play between the motor and the rotary encoder, thereby correcting inaccuracy. Even tilt and axial play of up to ±0.5 mm can be reliably compensated for. The stator coupling also facilitates easy mounting to the plane surface.


The encoder’s hollow shaft allows it be directly coupled to the mating shaft. No additional rotor coupling is required. The high rigidity permits higher control-loop bandwidths while significantly reducing inaccuracy and installation complexity. The Heidenhain ERN 1020 features high ruggedness and reliability in a compact design with an outer diameter of 35 millimeters, making it ideal for tight installation spaces.

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