Optical Angle Encoders

July 1, 2006
Signum RESM optical angle encoders are well-suited for direct drive rotary motors, eliminating position error and backlash while delivering speeds to more than 3,600 rev/min, accuracy to +/-0.5 arc second, plus resolution and repeatability to 0.02 arc second.

The RESM encoder features a large diameter, low-profile stainless steel ring that mounts directly to the machine shaft, avoiding coupling losses, oscillation, shaft torsion and other hysteresis errors inherent with sealed encoders, says the vendor. Available in industry standard ring diameters from 52mm to 413mm, the RESM encoders feature 20mm scale marked directly on the ring periphery, and an embedded In-Trac autophase optical reference mark that is repeatable in both directions.