Optical rotary (angle) encoders
High accuracy, superior metrology, easy integration.
Renishaw’s range of optical angle encoders include absolute and incremental versions, with accuracy to ±1 arc second, resolution to 0.00075 arc seconds and speeds up to 36000 rev/min.
Designed for demanding rotary applications that need long-term reliability and high dynamic performance, Renishaw's absolute and incremental rotary encoders have a low cross-section and a large internal diameter to allow easy positioning around internal rotors, payloads and services. Custom sizes or even larger diameters are available on request.
Stainless steel rings feature high-accuracy graduations, a choice of either optical reference marks or a bolt-on magnetic actuator and a unique taper mount which corrects for eccentricity or diameter tolerance of the rotor/shaft. These rings are compatible with a variety of readheads and suit applications demanding excellent resistance to mechanical vibration and thermal shock.
The new ATOM™ miniature encoder is also supplied with a range of RCDM glass rotary discs in diameters from Ø17 mm to Ø108 mm with a choice of either 40 µm or 20 µm scale pitch.
All rotary encoder rings offer a very low moment of inertia ensuring that whatever the installation, the system can be positioned with minimal torque and maximum speed.