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rotary encoders for robotics

KCI 120 Dplus

The KCI 120 Dplus dual encoder delivers motor feedback and position measurement in a single module that is resistant to ambient conditions and aging.

Two rotary encoders in one device

Product image 120Dplus HEIDENHAIN

The new KCI 120 Dplus dual encoder from HEIDENHAIN delivers motor feedback and position measurement in just one rotary encoder. By measuring the position downstream from the gearbox, the KCI 120 Dplus compensates for inaccuracies inherent in highly mobile and dynamic robots. This is necessary because, in order to achieve the desired mobility, articulated robots, operate with serial kinematics and up to six axes. Each of them influences the accuracy:

  • Each axis is driven by a servomotor via a gearbox that exhibits zero-position error, reversal error, and joint elasticity
  • In addition, forces and dynamic effects of the machining process impair the positioning accuracy

In order to perform its dual functions, the KCI 120 Dplus encoder has one central scanning unit and two separate circular scales. It is thus very compact and easy to integrate. The purely serial EnDat 2.2 interface with functional safety permits its use in safety-related applications such as human-robot collaboration.

Robust and reliable

The KCI 120 Dplus rotary encoders are dependable, robust, and compact. These remarkable solutions are resistant to contamination and magnetic fields. Functional safety and a safe mechanical connection are available.


Compact and accurate

The KCI 120 Dplus rotary encoders feature a flat profile and wide mounting tolerances. Dependable installation is easy to automate: the two circular scales are simply press-fitted onto the motor shaft and output shaft.

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The new e-book “12 ways to optimize your robot design using rotary encoders” provides valuable information to help you efficiently design and produce robots. Find out how to make your designs more compact and robust, regardless of your production scale.

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E-book encoders in robotics

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Product Variation 120Dplus

And product development continues!

  • Space-optimized for small cobots and compact drive systems
  • Freely mountable support flange assembly
  • Individualized integration of electronics for motor control
  • Functional safety

Discover our upcoming innovations

DR. JOHANNES HEIDENHAIN GmbH develops and produces linear encoders, angle encoders, rotary encoders and CNC controls for demanding positioning tasks. Rounding out its product portfolio are touch probes, camera systems, length gauges, digital readouts, signal converters, testing devices and inspection devices. What’s more, its practical software solutions for the Digital Shop Floor empower end users to fully digitalize their manufacturing ecosystem.

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