ISO 9001:2015
Modern means of measuring equipment

Optical absolute linear encoder RESOLUTE UHV with high-precision RSLA scale in stainless steel

Renishaw plc (Graet Britain)

Encoder RESOLUTE UHV with high-precision RSLA scale in stainless steel
Encoder RESOLUTE UHV with high-precision RSLA scale in stainless steel

RSLA scale in the form of a ruler provides the characteristics inherent in encoder systems with a smaller step, while still retaining all the advantages of the RESOLUTE UHV encoder. The linear encoder system with the RSLA line gives a total error of less than ± 4 μm at 5 m - the best result in the industry! (It is possible to solve the problems of position control for lengths up to 5 m - on request). The system includes a RESOLUTE UHV reading head and a stainless steel RSLA line in which only one track is used, an absolute scale at which absolute position and phase data are combined in a single code. In combination with the encoder characteristics such as low SDE and low jitter, the latest optical design, resolution up to 1 nm and ease of installation, the RSLA line is ideal for solving problems for long lengths that require high storage accuracy of measurements.

Made from stainless steel of special composition, the RSLA line has a coefficient of thermal expansion equal to 10.8 μm/m/°C and is distinguished by high corrosion resistance. The RSLA line has the same precision as aа high-precision glass ruler, but it´s more convenient to use: it can be folded for storage in a ring, but in a straightened state it behaves exactly like a rigid ruler. This sturdy ruler has a much smaller cross-section than conventional glass rulers. At the same time with such rulers it is easier to handle during transportation and installation, without risking to break them.


Built-in LED
head position indicator
Measuring range, m: up to 5
Length, m: – optic scale – from 0,08 to 5
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/m: – ± 1,5 (in length up to 1 m)
– ± 2,25 (in length up to 2 m)
– ± 3 (in length up to 3 m)
– ± 4 (in length up to 5 m)
Scale option: – mechanically fastened
- glued
Coefficient of thermal expansion, μm/m/°С: 10,8
Supply voltage, V: 5 ± 10 %
Current consumption (with load), mA: 250
Protocol: BiSS, FANUC, Siemens DRIVE–CLiQ, Mitsubishi, Panasonic
Material: – optical scale RSLA - hardened martensitic stainless steel
Cable: braided copper cable, shielded in one layer with silver foil, FEP-insulation of cores, deposited on tinned copper wire
Mass, g/m: – cable - 19
- optical scale RSLA – 172
Mass, g: – reading head – 19
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:
Vibration (in operation mode, at, at 55-2000 Hz), m/s 2: not more than 100

Additional information