Optical 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, the RESR, RESM and RESA angle encoders feature high-accuracy graduations marked directly onto a stainless steel ring. Available in a range of 20 diameters (from Ø52 mm to Ø550 mm) and with custom sizes or even larger diameters available on request, Renishaw's range of absolute and incremental angle encoders have a low cross-section and a large internal diameter to position easily around large internal rotors, payloads or services.
The angle encoder rings also feature a unique taper mount which corrects for eccentricity of the rotor/shaft and ensures excellent accuracy, offering easy and robust fine adjustment of the ring's form and all installation tolerances. In addition, the angle 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.
REXM and REXA ultra-high accuracy rings provide even higher performance, offering ±1 arc second total installed accuracy when used with dual readheads.