ISO 9001:2015
Modern means of measuring equipment

Optical incremental linear encoder SiGNUM with high-precision scale RSLM made of stainless steel

Renishaw plc (Graet Britain)

Encoder SiGNUM with high-precision scale RSLM made of stainless steel
Encoder SiGNUM with high-precision scale RSLM made of stainless steel

The new RSLM stainless steel line provides measurement accuracy comparable to high-precision glass scales, while providing a total error (including inclination and linearity) of less than ± 4 μm per 5 m - the best result in the industry! SiGNUM ™ RSLM encoder system , easy to install, with an optical signal filtering system, with a periodic error of ± 30 nm and a resolution of up to 5 nm, all the advantages of the encoder in 20 μm steps are preserved, inherent in systems with a significantly smaller step.

Features and benefits of the SR and Si interface reader

— Periodic error: ± 30 nm, which ensures the accuracy of operation inherent in encoders with a smaller pitch
- Ability to work at speeds up to 12.5 m/s and temperatures up to 85 0 C.
- Extremely high signal stability under conditions not acceptable for most open optical encoders.
- Si - interface provides standard analog and digital output signals.
-The user-selectable automatic gain control (AGC) mode allows to maintain a constant analog signal amplitude of 1 Vpp.
- Easy setup and diagnostics of the system thanks to LED indicators on the reading head and interface.
- The flexible cable between the reading head and the UL-compliant interface is up to 10 m long.

Optional line-connected connector with protection class IP68.

Ruler RSLM in stainless steel in 20 μm steps

The RSLM ruler in stainless steel with a pitch of 20 microns is excellent for those cases when it comes to moving within a significant length while maintaining high accuracy.

This robust ruler is offered with standard lengths up to 5 m.

The total error is less than ± 4 μm at 5 m.
- Coefficient of thermal expansion: 10.8 μm/m/ 0 С.
- Ribbon RSLM can be folded into a ring for convenient handling and storage, while in the straightened state it behaves the same as the scale ruler.
- Fixing with a special adhesive base or mechanical clamps.
- Optical zero mark IN-TRAC with automatic synchronization provides two-way repeatability of arrival to zero point at speeds of movement up to 12.5 m/s.
- Various zero-mark positions for IN-TRAC: in the middle of the scale (RSLM), at the end of the scale (RSLE), with distance codes for indexing short displacements (RSLD) or with equal intervals for customer selection (RSLC).
- Pair limit switches installed directly on the line provide an automatic feed of the signal that initiates the stop of the moved assembly.

SiGNUM ™ Software

SiGNUM ™ package is installed on the computer and allows for comprehensive calibration, optimization and real-time diagnostics, which simplifies the installation and maintenance of the system. The Si-interface is connected to the computer via a connector with a mini-USB connector.
- Work in "real-time" mode, remote monitoring of signal level and system characteristics, including infrared signal level indicator, Lissajous figures output, feedback indicator (automatic gain control system operation) - all these tools allow optimize the operation of the entire system.

The head angular position indicator allows fine adjustment of the pitch angle of the reading head.
- Fast and easy remote calibration of zero mark signals and incremental encoder signals.
- Issue alerts that indicate that the operating conditions are below optimal (warning), or that there is a malfunction (alarms).
- The Technical Reference Guide provides context-sensitive help with a detailed description of the system functions and troubleshooting methods.
- The system configuration page displays data related to the configuration of the Si-interface, in particular, resolution, clock frequency, etc.
- The user can choose one of the following interface languages: English, German, Italian and Japanese.


Built-in LED
head position indicator
Measuring range, m: — up to 5
Length of the optical scale RSLM, m: —from 0,08 to 5
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: 20
Max speed, m/s: 12,5
Clearance between reading head
and optical scale, mm:
0,8 ± 0,08
Accuracy of the system at 20° C, μm: ± 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: — base bracket and mounting clips
- self-adhesive base
Coefficient of thermal expansion, μm/m/°С: 10,8
Supply voltage, V: 5 ± 10 %
Current consumption (without load), mA: — 250 (in typical conditions)
Material of the optical scale RSLM: — hardened martensitic stainless steel
Cable: — flexible, with double shielding, outer diameter 4.7± 0,1 mm, cable service life for bending more than 20 x 10 6 cycles with a bend radius of 20 mm, corresponds to UL standard
Length of the cable, m: 0.5, 1, 1.5, 3, 5, 10 (14-pin connector, for connection directly to the Si-interface)
Dimensions of the reading head SR (height × length × width), mm: 14,8 × 36,0 × 16,5
Mass, g: reading head SR-15
- Si-interface - 205
Mass, g/m: optical scale RSLM - 173
- cable - 35
Reference mark (zero): optical, IN-TRAC, with automatic zero-signal synchronization
Limit switches: paired, optical
Temperature, °С: — process reading head SR - 0 to + 85 V - process - Si-interface - 0 to + 70 V - storage - system SiGNUM - from - 20 to + 70
Degree of protection: optional in-line connector - IP68
- readout head SR - IP64
- Si interface - IP30
(without compensation, with temperature + 40 °C), %:
Process 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/s2: 100

Additional information


Description and technical specifications