Optical absolute linear encoder RESOLUTE UHV with a high-precision RELA scale from Invar
- Production:
- Renishaw (United Kingdom)
- Encoder RESOLUTE UHV with a high-precision RELA scale from Invar
In cases where very high accuracy is required in combination with a "zero" coefficient of thermal expansion, the RESOLUTE UHV encoders can be used with the absolute linear RELA scale , this scale is made of Invar, an iron-nickel alloy with a low coefficient of expansion.
Due to the unique accurate Renishaw grading process, the RELA range has a certified accuracy of ± 1 μm for lengths up to 1.13 m, certification and calibration of the accuracy of each line is performed in accordance with international standards.
The invar thermal expansion coefficient is approximately 0.6 μm/m/°C within the temperature range from 0 to 30 ° C. In order to solve the problems with very high requirements for accuracy, one can take into account the influence of this small factor, for each ruler its exact value is determined, which is indicated in the calibration certificate.
In addition to the very low coefficient of thermal expansion, Invar products are exceptionally strong. This makes it possible to produce rulers with a much smaller cross-section as compared to brittle glass rulers. At the same time with invar rulers it is easier to handle during transportation and installation, without risking to break them.
Specifications
| Built-in LED head position indicator |
Yes |
| Measuring range, m: | from 0,07 to 1,12 |
| Length, m: | – optic scale RELA – from 0,08 to 1,13 |
| Resolution, nm: | 1, 5, 50, 100 |
| Step of the scale, mkm: | 30 |
| Max speed, m/s: | 100 |
| Clearance between reading head and optical scale, mm: |
0,8 ± 0,15 |
| System accuracy at 20 ° C, μm: | – ± 1 (in length up to 1,13 м) |
| Scale option: | – mechanically fastened - glued |
| Coefficient of thermal expansion, μm/m/°С: | — 0,6 (at temperatures from 0 ° C to 30 °C) — not less than 1,4 (at temperatures from 30 ° C to 100 °C) |
| Supply voltage, V: | 5 ± 10 % |
| Current consumption (with load), mA: | 250 |
| Protocol: | BiSS, FANUC, Siemens DRIVE–CLiQ, Mitsubishi, Panasonic |
| Material: | – optical scale RELA - highly stabilized, low-expansion iron-nickel alloy (ZeroMet. - Invar) |
| Cable: | braided copper cable, shielded in one layer with silver foil, FEP-insulation of cores, deposited on tinned copper wire |
| Mass, g: | – reading head – 19 |
| Mass, g/m: | – cable – 19 – optic scale RELA – 184 |
| Temperature, °С: | – process – from 0 to + 75 – storage – from 0 to +80 – sintering – + 120 |
| Degree of protection: | IP30 |
| Maximum humidity (estimated at temperatures up to + 40 ° C, without condensation), %: | 95 |
| Acceleration, m/s 2: | 500 |
| Impact (in non-operating state, 6 ms, half-sinusoidal impulse), m/s 2: |
1000 |
| Vibration (in operation mode, at, at 55-2000 Hz), m/s 2: | not more than 100 |
See also:
- Optical absolute linear encoder RESOLUTE UHV with RTLA scale in FASTRACK guides and with self-adhesive RTLA-S scale
- Optical absolute linear encoder RESOLUTE UHV with high-precision RSLA scale in stainless steel
Optical absolute linear sensor RESOLUTE UHV for use in ultrahigh vacuum
Downloads:
Description and technical specifications
- Non-contact position encoders guide (EN) (pdf, 10`420 Кб)
