What is SEF Encoder?

SEF Encoder is a true absolute, fine pitch optical encoder system that has excellent dirt immunity, and an impressive specification that breaks new ground in position feedback. It is absolute encoder capable of 18-26bit resolution at 3000-5000 rpm. Ultra low Sub-Divisional Error (SDE) and jitter result in a rotary encoder system that outperforms any other encoder in its class.

What is SEF encoder senor ring?

SEF encoder senor ring is a one-piece stainless steel encoder ring with absolute scale code marked directly on the periphery. Very similar to the Renishaw RESA30 rotary encoder ring。 SEF encoder senor ring have Seven versions are available in a wide range of sizes (Ø106 mm to Ø330 mm).‘A' section rings, which offer an impressive installed accuracy, feature a taper mount system which reduce the need for highly toleranced machined parts and eliminate eccentricity. ‘B' section thin rings, which are low inertia and mass, are also available. Both 'A' and 'B' section rings have a large internal diameter for flexible integration. The non-contact format eliminates backlash, shaft wind-up (torsion) and other mechanical hysteresis errors that are inherent in traditional enclosed encoders.