Optical incremental encoder
Renishaw ATOM DX
Renishaw's smallest incremental optical encoder, with interpolation integrated into the miniature readhead so digital output needs no external interface. Shares ATOM scales and discs.
Key specifications
| Outer diameter | 17–108 mm |
|---|---|
| Ingress protection | IP40 |
| Linear speed (max) | 20 m/s |
| Resolution (finest) | 2.5 nm |
| Accuracy | RTLF20/RKLF20 ±5 µm/m; RTLF40/RKLF40 ±15 µm/m; RCLC ±3 µm/m; disc ±19.7 to ±3.1 arc sec system |
| Interface | RS422 digital |
Summarised in our own words from Renishaw plc's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Readhead 20.5 x 12.7 x 10.85 mm (top-exit 7.85 mm), 3.2 g. Operating 0 to +70 °C. 2.5 nm option on 20 µm version only. Rotary up to 29,300 rpm. 20 µm discs 30-108 mm OD.
Specify Motion is not affiliated with Renishaw plc. Renishaw and ATOM DX are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Engineer support
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Our experienced engineers are on hand, ready to help with your project. Whether you need the Renishaw ATOM DX itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
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- Complete axis: motor, drive, gearing and feedback matched together
Other optical incremental encoder series
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Tell us about your project and how you use the Renishaw ATOM DX: the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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