Optical incremental linear encoder RGH25F
- Production:
- Renishaw plc (Graet Britain)
- Encoder RGH25F
When working with the open, non-contact ultra-compact reading head of the RGH25F encoder, a unique RGS20-S scaled tape with a 20 μm pitch of Renishaw is used, with a resolution of up to 5 nm. The small head RGH25F provides connection of external interpolation means using the REF interface, which allows automatic adjustment of the gain and offset of the signal and provides various diagnostic functions.
Characteristics and advantages of the reading head RGH25F
- Ultra-compact light reading head, ideal for cases with limited space.
- The non-contact design provides high speed and reliable operation with zero friction and no mechanical wear.
- Easy installation and setup of the reading head due to the presence of a special built-in LED indicator on the interface unit.
The optical signal filtering system guarantees high signal stability in conditions that do not allow the use of most open optical encoders.
- Electronics with automatic tuning, providing high accuracy and reliability.
- Automatic signal gain adjustment (AGC), signal bias (AOC) and balance (ABC) ensures that the cyclic error is minimized (less than ± 50 nm).
- The zero mark ensures the repeatability of the initial position, and the limit switches - the automatic signal giving the initiating stop of the moved node.
The zero mark ensures the repeatability of the initial position, and the limit switches - an automatic signal that initiates the stop of the moved node.
Scale tape RGS20-S in 20 μm steps
RGS20-S tape with a pitch of 20 microns is made of a thin flexible steel strip, which is coated with gold to provide high reflectivity and corrosion resistance. This tape can be fixed, using a self-adhesive base, on most materials used in the industry, including metals, ceramics and composites materials.
- The tape is supplied on a reel, so you can cut off parts of the desired length, up to 70 m.
RGS20-S tape has temperature characteristics corresponding to the characteristics of the substrate on which the tape is attached, which simplifies the process of compensating for the effect of temperature.
- A special device is provided for fast and accurate installation of the scale tape (patented).
The lacquer coating of the tape is easy to clean and is resistant to external influences that occur when manipulating the tape.
You can always cut a piece of any necessary length that optimizes inventory management and minimizes waste.
- High accuracy of linearity tolerance of ± 3 μm/m provides high overall accuracy with simple adjustment procedure.
Specifications
| Built-in LED head position indicator |
Yes |
| Measuring range, m: | up to 50 |
| Length, m: | — optical scale RGS20–S — from 0,1 to 50 (more than 50 m — by special order) — optical scale RGS20–PC — from 1 to 50 |
| Resolution of digital output signal RS422, nm: | 5, 10, 20, 50 , 100, 200, 500, 1000, 5000 |
| Resolution of analog output signal: | — 1 Vpp |
| Step of the scale, mkm: | — optical scale RGS20–S — 20 — optical scale RGS20–PC — 20 |
| Max speed, m/s: | — for digital output signal — up to 5 — for analog output signal — up to 6 |
| Clearance between reading head and optical scale, mm: |
0,8 ± 0,1 |
| System accuracy at 20 ° C, μm/m: | ± 15 (± 3 — with 2-point compensation) |
| Scale option: | — with self-adhesive base |
| Coefficient of thermal expansion, μm/m/°Ñ: | — corresponds to the substrate material, the ends of the scale are fastened by clamps |
| Supply voltage, V: | 5 – 5 % — + 10 % |
| Current consumption (without load), mA: | — 200 |
| Material: | — optical scale RGS20–S — thin,
flexible steel gilded strip with protective lacquer coating — optical scale RGS20–PC — thin, flexible steel gilded strip with protective polyester coating for increased resistance to the effects of aggressive chemicals |
| Cable: | — flexible, double-shielded, 4.4 mm outer diameter, bending life more than 20x10 6 cycles with a bending radius of 20 mm |
| Length of the cable, m: | 1.5, 3, 5 (connector type D –sub (15– pin) |
| Dimensions of the reading head RGH24 (height × length × width), mm: | 10,5 × 36,0 × 13,5 |
| Mass, g: | —reading head — 9 —interface — 100 |
| Mass of the cable, g/m: | 34 |
| Reference mark (zero): | Magnetic actuator (one-way repeatability up to 1 resolution unit) |
| Limit switches: | One switch |
| Temperature, °Ñ: | — process — from 0 to + 55 — storage — from – 20 to + 70 |
| Degree of protection: | — reading head — IP40 —interface — IP20 |
| Maximum humidity (without compensation), %: |
— process — 80 — storage — 95 |
| Process 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 incremental linear encoder RGH22
- Optical incremental linear encoder RGH24
- Optical incremental linear encoder RGH25F UHV
- Optical incremental linear encoder RGH26
Series of optical incremental linear sensors RG2
Downloads:
Description and technical specifications
- Non-contact position encoders guide (EN) (pdf, 10`420 Êá)
