Optical incremental encoder
Renishaw VIONiC
All-in-one incremental optical readhead with interpolation built into the head, giving direct digital output without a separate interface. Renishaw positions it as its highest-performing incremental system.
Key specifications
| Outer diameter | 52–550 mm |
|---|---|
| Ingress protection | IP40 |
| Linear speed (max) | 12 m/s |
| Resolution (finest) | 2.5 nm |
| Accuracy | RELM20 ±1 µm/m; RTLC20/RKLC20-S ±5 µm/m; rotary ±4.3 to ±0.5 arc sec |
| 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 35 x 13.5 x 10 mm, 8.6 g; operating 0 to +70 °C. SDE < ±15 nm linear. Rotary up to 4,400 rpm. Uses same scales as TONiC.
Specify Motion is not affiliated with Renishaw plc. Renishaw and VIONiC are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Renishaw part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 2 series from our supply network are the closest match on published figures.
Absolute linear magnetic read head for LMSA scales, 1 µm resolution, IP67.
| Published maximum | VIONiC | ALS21 |
|---|---|---|
| Speed | 12 m/s | 15 m/s meets or exceeds |
Rugged incremental head with RS422 or HTL output and 10-30 VDC supply option. Works on linear and rotary scales.
| Published maximum | VIONiC | IKS23 |
|---|---|---|
| Speed | 12 m/s | 16 m/s meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Other optical incremental encoder series
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