High-Accuracy Angle Encoders from Heidenhain

Heidenhain Corp.

Heidenhain Corp., Schaumburg, IL, has expanded its range of ERA 4000 angle encoders to include the ERA 4x80, ERA 4x81, and the ERA 4x82, available in 7 diameters, from 52.65–331.31 mm o.d. and grating periods of 20, 40, or 80 µm. The ERA 4x80 mounts using a centering collar method and offers system accuracies from ±6.1 arc seconds to ±2.8 arc seconds. The ERA 4x81 weight-reduced T-profile version mounts using a 3-point centering method and offers system accuracies of ±8.6 arc seconds to ±2.8 arc seconds. The ERA 4x82 uses 3-point centering and offers system accuracies from ±5.1 arc seconds to ±2 arc seconds. Accuracies depend on grating period and diameter.