BEARINGLESS FEEDBACK ANGLE ENCODERS
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Heidenhain Corp. has introduces its expanded series of ERA 4000 angle encoders. Suitable for use on a wide range of rotary motion systems, spindles, and other motors, the ERA 4x80 version is mounted using a centering collar method. This low profile encoder system does not require centering methods as the precision machined centering collar mates with the precision machined shaft of the motion system. With 7 standardized diameters, system accuracies are offered with the 20 µm grating period version from ±6.1 arc sec with the smallest diameter to ±2.8 arc sec on the largest diameter.
The ERA 4x81 is the weight reduced T profile version which is mounted
using the 3-point centering method. The three centering marks are
placed on the ring at 120° intervals to point to the exact center of
the ring while it is on the manufacturing device, and then the encoder
gratings are written onto the ring so that when the centering marks are
used during installation, non circular geometries of the ring and
gratings are eliminated. Encoder system accuracies of ±8.6 arc sec are
offered with the smallest diameter of the series using 20 µm grating
period and ±2.8 arc sec for the largest diameter in this group.
The ERA 4x82 uses the 3-point centering method for installation and has the highest accuracy of the series. This version with the same inertia as the ERA 4x80, but without the centering collar, offers system accuracies from ±5.1 to ±2 arc sec for the largest diameter.
heidenhain.com
The ERA 4x82 uses the 3-point centering method for installation and has the highest accuracy of the series. This version with the same inertia as the ERA 4x80, but without the centering collar, offers system accuracies from ±5.1 to ±2 arc sec for the largest diameter.
heidenhain.com
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