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A telecommunications company is meeting the installation challenge posed by the introduction of high-speed fibre-optic broadband infrastructure using two non-contact RM22 magnetic encoders from Renishaw.

The fragility of glass fibre strands and of the sheathed fibre bundles means they cannot be pushed or pulled into ducts; the customer discovered that when threading a fibre bundle into a duct, high-pressure air eases its passage.

The two Renishaw encoders are integrated into the fibre-blowing device, developed by Factair, to detect slippage that would damage the surface of the sheath: one monitors the rate at which the fibre bundle is threaded into the machine; the other monitors the rate at which the caterpillar tracks on the device are moving.

Key benefits of application

  • The non-contact encoders, which utilise Hall-effect technology, are able to withstand the harsh environments encountered in this application, including wet and dirty conditions caused by poor weather.
  • Non-contact units are said to be more reliable than full-contact encoders and will last indefinitely, while full-contact units would need to be replaced often.
  • The RM22 encoder’s body is machined from aluminium alloy, and the magnetic actuator is enclosed in stainless steel, providing IP68 protection from dirt ingress.
  • Seals are not required as the encoder is immune to liquids, oils and dirty environments.
  • Nitzan Gonen, design and development director at Factair, said he was very satisfied with the Renishaw encoders.

Renishaw

A world leader in engineering technologies, Renishaw’s core skills in measurement and precision machining serve sectors as diverse as dimensional metrology, spectroscopy, machine calibration, motion control, dentistry and surgical robotics.

A world leader in engineering technologies, Renishaw’s core skills in measurement and precision machining serve sectors as diverse as dimensional metrology, spectroscopy, machine calibration, motion control, dentistry and surgical robotics.

Sensors for co-ordinate measuring machines (CMMs) are an industry standard, from basic touch-trigger probes through to automated stylus and probe changers, motorised indexing probe heads, and revolutionary five-axis measurement systems.

Machine probes for CNC machine tools allow automated tool setting, workpiece set-up, in-cycle gauging and part inspection. Products include laser tool setters, contact tool setters, tool breakage detectors, touch probes and high accuracy inspection probes.

For motion control, Renishaw supplies laser encoders, optical linear encoders, optical angle encoders, optical rotary encoders, magnetic rotary encoders, magnetic chip encoders and magnetic linear encoders.

To analyse the static and dynamic performance of position-critical motion systems, Renishaw’s laser interferometer and environmental compensation system offers a linear measurement accuracy of 0.5 ppm, readings of up to 50 kHz and a linear measurement speed of up to 4 m/s, with a linear resolution of 1nm.

Renishaw’s Raman spectroscopy products exploit the Raman effect to identify and characterise the chemistry and structure of materials. A diverse range of analytical applications include pharmaceutical, forensic science, nanotechnology, biomedical and semiconductors.

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