SiGNUM™ RESM rotary (angle) encoder system

SiGNUM RESM angle encoder offers accuracy, resolution, and repeatability at high speed and high temperature. It also offers ultra-low cyclic error and the IN-TRAC™ optical reference mark.

Performance to suit the most demanding precision applications.

Page contentDownloadsCall your local office Contact us online

SR on RESMSiGNUM™ RESM angle encoder offers accuracy, resolution, and repeatability at high speed and high temperature. It also offers ultra-low cyclic error and the IN-TRAC™ optical reference mark. The RESM angle encoder offers performance to suit the most demanding precision applications. SiGNUM™ is also available as a linear encoder.

SR readhead and Si interface features and benefits

Si-FN for FANUC serial interfaceThe system comprises the SR readhead, Si interface and RESM 20 µm ring.

  • Dynamic signal control ensures cyclic error of ±30 nm, offering 'fine pitch' encoder performance
  • Capable of operation over 4,500 rev/min and up to 85 °C
  • Excellent signal stability in conditions unsuitable for most open, optical encoders
  • IP64 'recoverable readhead' offers "wipe clean" recovery from coolant splashes or floods
  • Si interface offers industry standard analogue and digital outputs
  • The FANUC serial compatible interface (Si-FN) offers FANUC serial communications direct from the interface for higher performance and easier connectivity (the Si-FN is compatible only with Ø52 mm, Ø104 mm, Ø209 mm and Ø417 mm rings)
  • User selectable AGC maintains 1 Vpp analogue signal amplitude
  • Readhead and interface LEDs for optimum set-up and system diagnosis
  • High flex UL approved cable – up to 10 m between readhead and interface
  • Optional IP68 in-line connector available

Compare the SR with alternative optical angle readheads.

RESM ring features and benefits

RESM montageThe RESM ring is a one-piece stainless steel ring with 20 µm scale marked directly on the periphery, which features the IN-TRAC™ auto-phase optical reference mark. The low profile RESM is available in a wide range of sizes (Ø52 mm to Ø550 mm) and line counts, all of which feature a large internal diameter for flexible integration.

  • IN-TRAC™ auto-phase optical reference mark, bi-directionally repeatable at operational speeds over 4,500 rev/min (Ø52 mm) and up to 85°C
  • A wide range of diameters and line counts provide compatibility with industry standard controllers (Ø52 mm to Ø550 mm with line counts from 8,192 to 86,400)
  • Patented taper mount minimizes installation errors and simplifies integration
  • Graduation accuracy to ±0.5 arc seconds* and system repeatability to 0.02 arc second (20 nm Si interface with a Ø413 mm ring)
  • 10 mm x 10 mm small cross section ring
  • Low mass, low inertia design enhances system accuracy and dynamic performance
  • One piece stainless steel ring withstands vibration, mechanical and thermal shock, and thermal overload
  • For even higher acceleration and deceleration, and shorter settling times, extra-low inertia 'B' section rings are available
  • FANUC serial Si-FN interface compatible with Ø52 mm, Ø104 mm, Ø209 mm and Ø417 mm rings
  • For partial arc applications, customer positioned, dual optical limits are available

* Typical result for a 200 mm RESA ring 

SiGNUM™ software

Multilingual SiGNUM™ softwareSiGNUM™ software is PC based and provides comprehensive calibration, set-up optimisation and real-time diagnostics to simplify installation and system maintenance. The Si interface is connected to the PC via a mini USB connector.

  • 'Real time', remote monitoring of signal level and system performance, including signal strength meter, Lissajous plot and IRED feedback meter (AGC drive), to assist with system optimisation
  • Pitch adjustment indicator enables fine adjustment of the readhead pitch
  • Quick and simple remote calibration of the reference mark and incremental signals
  • Remote monitoring of system performance via USB during real-time closed-loop operation
  • System alerts warn the user of conditions that are less than optimum (warning function) and of any errors that occur (alarm function)
  • Technical 'info' guide provides contextual help and a detailed explanation of system functions and fault-finding
  • System configuration page displays Si interface configuration detailing resolution, clock frequency, etc
  • DRO functionality available with FANUC serial Si-FN interface
  • Multilingual user interface allows the user to select from English, German, Italian and Japanese

Download SiGNUM™ software now.

Technical specifications

Readhead dimensions14.8 mm x 36.0 mm x 16.5 mm (H x L x W)
Outputs (resolution)

RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm, 5 nm.

Analogue: 1 Vpp

FANUC serial: 20 bit, 23 bit, 24 bit, 25 bit, 26 bit

InterpolationSi interface (x4 to x4000)
Reference markIN-TRAC™ auto-phase optical
Limit switchesCustomer positioned optical dual limits
Maximum speed4,500 rev/min
Ride height tolerance

0.8 ±0.08 mm

Scale types20 µm RESM ring
Vacuum compatibleNo 

System accuracy - 20 µm pitch RESM and SiGNUM™

Nominal outside diameter (mm)

System accuracy (arc second)

 52 4.28
 57 3.91
 75 2.97
 100 2.23
 101 2.21
 103 2.16
 104 2.14
 115 1.94
 150 1.49
 200 1.11
Nominal outside diameter (mm)

System accuracy (arc second)

 206 1.08 
 209 1.07
 229 0.97
 255 0.87
 300 0.74
 350 0.64
 413 0.54
 417 0.53
 489 0.46
 550 0.41

Note: system error is graduation error plus sub-divisional error (SDE). Effects such as eccentricity influence installed performance; for application advice please contact Renishaw.

Additional resources

Accessories and external interpolation options

For further information and product options, visit the encoder product configurator.

Downloads

  • SiGNUM™ Software version 5.0.

    SiGNUM software version 5.0 (released January 2012) - required to optimise installation and set-up of SiGNUM rotary and linear encoders and provides a quick and comprehensive system calibration. The SiGNUM Si interface is connected to the PC via a mini USB connector and the software provides real-time diagnostics to simplify installation and system maintenance.

    [40.1MB]
  • SiGNUM™ software version 5.0.

    SiGNUM software version 5.0 (released January 2012) - required to optimise installation and set-up of SiGNUM rotary and linear encoders and provides a quick and comprehensive system calibration. The SiGNUM Si interface is connected to the PC via a mini USB connector and the software provides real-time diagnostics to simplify installation and system maintenance.

    [40.3MB]
  • Offline Encoder product configurator

    An offline version of the Encoder product configurator. Available for download

    [2.1MB]

Brochures

Data sheets

Installation guides

Drawings

Technical articles

  • White paper: The accuracy of angle encoders White paper: The accuracy of angle encoders

    Many automation systems rely on precision rotary motion, such as rotary format computer-to-plate (CTP) pre-press machines, machine tool A, B & C axes, surface mount machines and wafer handling and inspection equipment. Different applications demand different combinations of performance and features to optimise their function – some require accuracy, others repeatability, high resolution or low cyclic error for velocity loop control. Typically you would select the encoder that offers the optimum balance of specification and function, and there is a bewildering array to choose from. Yet few are capable of meeting all requirements.

    [817kB]

3D models (step format)

Next steps

Contact us online if you require more information or you have a pricing query, or alternatively you may like to speak directly to your local Renishaw office.