Aura employs a short wavelength LED for precise absolute position decoding. An incremental scale track and advanced sensor produce pure sinewave signals, enabling high resolution interpolation with run-speeds up to 83,721 rpm (with 18 mm scale). High repeatability and accuracy satisfy the most demanding applications.
The small, low power consumption SMT package integrates easily into an OEM PCB. Generous alignment tolerances facilitate installation. Built-in scale eccentricity compensation improves production efficiency and eliminates the cost of dual averaging encoders.
High speed BiSS-C delivers the minimal latency required for high bandwidth control loops. SSI, SPI and ABZ interfaces complete the comprehensive connectivity options. ABZ provides communication redundancy and the flexibility to operate incrementally for the lowest latency.
SmartPrecision™ III is intuitive software for calibration, alignment and status monitoring. Encoder data can be sampled and recorded in a CSV file. To simplify installation, hubs with pre-mounted encoder scales are offered.
- Absolute position feedback
- Small, low power SMT package
- High resolution and accuracy
- High run-speed
- Wide alignment tolerances
- Scale eccentricity compensation
- Low communication latency
- Comprehensive connectivity
Specifications of Aura® Series
| Specifications | Rotary | Linear |
| Dimensions | 9.0 x 7.0 x 1.1 mm | 9.0 x 7.0 x 1.1 mm |
| Interfaces | BiSS-C, SSI, SPI, ABZ | BiSS-C, SSI, SPI, ABZ |
| Resolution* | 18-22 bit* | ± 12.5 to 200 nm |
| Latency | < 5 μsec (BiSS-C) < 5 μsec (SPI) < 30 μsec (SSI) | < 5 μsec (BiSS-C) < 5 μsec (SPI) < 30 μsec (SSI) |
| Accuracy** | ± 0.005° | ± 2 μm |
| Repeatability | 1 LSB | 1 LSB |
| Speed | 83,721 rpm (with 18 mm scale) | 50 m/s |
| Input Voltage | 5 VDC ± 0.5 | 5 VDC ± 0.5 |
| Supply Current | 45 mA, unterminated outputs | 45 mA, unterminated outputs |
| Operating Temperature | -20 to 85° C | -20 to 85° C |
| Weight | 1.5 g | 1.5 g |
| Standard Scales*** | 18 to 63.5 mm OD | 9 to 195 mm |
* Higher resolution can be achieved by increasing averaging sample size.
** Accuracy is specified using a glass scale with OD 51.8 mm (Rotary) and 80 mm measurable length (Linear).
*** Custom rotary and linear glass scales available – contact your local representative for more information.
| Rotary Scale Part Number | Scale OD (mm) | Aura Configuration File (.acf) |
|---|---|---|
| AUR-R-G-0001 | 26.0 | Aura Chip |
| AUR-R-G-0001 | 26.0 | Aura Evaluation Board |
| AUR-R-G-0002 | 18.0 | Aura Chip |
| AUR-R-G-0003 | 33.0 | Aura Chip |
| AUR-R-G-0004 | 63.5 | Aura Chip |
| AUR-R-G-0004 | 63.5 | Aura Evaluation Board |
| AUR-R-G-0006 | 51.8 | Aura Chip |
| Linear Scale Part Number | Aura Configuration File (.acf) |
|---|---|
| AUR-L-G-XXXX | Aura Chip |
| AUR-L-G-XXXX | Aura Evaluation Board |