Inductive Encoder

Zettlex inductive encoder (IncOder) range uses a transformer or inductive technique and is ideally suited to harsh environments, where optical encoders may prove unreliable.

IncOders have 2 main parts – a Stator and a Rotor – each shaped like a flat ring.  This ring shape makes it easy to accommodate through-shafts, slip-rings, optical-fibres, pipes or cables.  The inductive encoder’s Stator is powered and the Rotor is passive.  The Stator contains the electronics to receive power and generate an output signal.  The output signal from the Stator shows the true absolute position of the Rotor relative to the Stator without the need of any motion.  There is no need for compliant or special couplings and the inductive encoder can simply be screwed to the host product.  Precise mechanical mounting is not required and there are no bearings.

Inductive Encoders – True ‘Fit and Forget’ Devices

Whereas optical or capacitive encoders can be unreliable in harsh conditions – notably with condensation or dust –  Zettlex inductive encoders are generally unaffected by foreign matter and IP67 rated versions are available.  Unlike capacitive ring encoders devices, there is no need to earth the Rotor or Stator.  IncOder style inductive encoders have no contacting, delicate or wearing parts, so there is no need for periodic replacement, service or maintenance.  In other words, IncOders are ‘fit and forget’ devices.  Applications for Zettlex ring encoders include:-

  • Rotary joints & gimbals
  • Actuator servos & motor encoders
  • Electro-optical & infra-red camera systems
  • Heliostats & solar equipment
  • Robotic arms & CNC machine tools
  • Test & calibration equipment
  • Light & heavy calibre weapons systems
  • Targeting systems & range finders
  • Antenna pointing devices & telescopes
  • Packaging & laboratory automation
  • Medical scanners & surgical equipment
  • Cranes & telescopic manipulators.
inductive encoder

Fig.1. Zettlex IncOder inductive encoders have no contacting, delicate or wearing parts, so there is no need for periodic replacement

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