RGH20F incremental encoder with RESR20 rotary (angle) ring
Features
- Readhead size: 36 x 13.5 x 10.5 mm
- Resolutions to 5 nm
- Speed up to 5 m/s (up to 1 836 rpm depending on ring size and resolution)
- Analogue or digital outputs
- Low Sub-Divisional Error (SDE): typically ±0.05 µm

Traditional optical encoders
Not recommended for new designs
The RG2 and RG4 incremental encoder systems have a strong reputation established over many years for providing reliable and robust position feedback for a wide variety of applications. However, Renishaw is continually developing innovative incremental and absolute encoder technologies and our latest encoder systems offer a range of additional benefits including enhanced metrology, smaller package size, easier installation and detailed diagnostics. Therefore, the RG2 and RG4 series are not recommended for new designs.