POSITION FEEDBACK
Optical encoders for precision positioning.
Select by motion geometry, feedback type, resolution, speed, interface, installation envelope and environment—not by one headline number.
Request an encoder recommendation ↗SELECT ENCODER TECHNOLOGY
Start with the feedback architecture.
01
Incremental linear
Compact, configurable feedback for stages, linear motors and scientific motion.
→02Absolute linear
Direct position data for systems that must avoid conventional homing.
→03Rotary
Disc-based feedback for rotary stages, spindles and angular positioning.
→04Vacuum-oriented
Begin the review with materials, cable, vacuum level and outgassing evidence.
→MODEL COMPARISON
Compare the first-selection variables.
Values shown here are source-backed. Final speed and environment suitability remain configuration-dependent.
ModelTypeKey specificationPositioning
SMG20Incremental linear20 µm pitch · down to 0.5 nmMiniature, high-resolution→SMG26Incremental linear256 µm pitch · down to 4 nmHigh-speed architecture→SAG21Absolute linearBiSS-C · 20 MHz clockDirect absolute position→MICRON-P2Incremental linear20 µm pitch · compact readheadSpace-constrained systems→SCG SeriesIncremental rotaryFour disc formatsRotary position feedback→SELECTION KNOWLEDGE
Incremental or absolute?
Compare homing strategy, interface, failure recovery, travel and motion profile before selecting the feedback architecture.
Read the engineering guide →