World class HEIDENHAIN Encoders in India | highest possible accuracy, reliable reproducibility and repeatability



HEIDENHAIN  offers solutions for all applications in which the highest possible accuracy, reliable reproducibility and repeatability, safe process management, high machine dynamics, simple operation and of course maximum efficiency are required.

Linear encoders

Sealed linear encoders are protected from dust, chips and splash fluids and are ideal for operation on machine tools. 

Exposed linear encoders operate with no mechanical contact between the scanning head and the scale or scale tape. Typical areas of application for these encoders include measuring machines, comparators and other precision devices in linear metrology, as well as production and measuring equipment, for example in the semiconductor industry.

With incremental linear encoders,the current position is determined by starting at a datum and counting measuring steps, or by subdividing and counting signal periods. Incremental encoders from HEIDENHAIN feature reference marks, which must be scanned after switch-on to reestablish the datum. This process is especially simple and fast with distance-coded reference marks. 

Absolute linear encoders require no previous traverse to provide the current position value. The encoder transmits the absolute value through the EnDat interface or another serial interface. 

Sealed linear encoders

Sealed linear encoders from HEIDENHAIN are protected from dust, chips and splash fluids and are ideal for operation on machine tools.

  • Accuracy grades as fine as ± 2 μm
  • Measuring steps as fine as 0.001 μm
  • Measuring lengths up to 30 m (to 72 m upon request)
  • Fast and simple installation
  • Large mounting tolerances
  • High acceleration loading
  • Protection against contamination

Exposed linear encoders are designed for use on machines and installations that require high accuracy of the measured value. 

Typical applications include:

  • Measuring and production equipment in the semiconductor industry
  • PCB assembly machines
  • Ultra-precision machines
  • High-accuracy machine tools
  • Measuring machines and comparators, measuring microscopes, and other precision measuring devices
  • Direct drives


HEIDENHAIN Angle encoders

Measuring angles with angle encoders

Angle Encoders

HEIDENHAIN angle encoders are characterized by high accuracy values in the arc second range and better.
Examples for application: 

  • Rotary tables on machine tools
  • Swivel heads on machine tools
  • C axes on lathes
  • Gear-testing machines
  • Printing units of printing machines
  • Spectrometers
  • Telescopes 

Sealed angle encoders

A major hallmark of HEIDENHAIN angle encoders is their very high system accuracy. This makes them particularly advantageous in demanding applications for machine tools, measuring machines, telescopes, printing machines, etc. Because the bearing is integrated into the encoder, machine component bearings have no effect on the measuring accuracy. The following overview helps you rapidly select the appropriate encoder series for your application based on the following characteristics

Modular angle encoders with optical scanning

Field of application: High-resolution rotary axes with high reproducibility 
– Very high number of signal periods
– Small mounting space
– Small interpolation error and low signal noise

Modular angle encoders with magnetic scanning

The ERM scale drums are available in two completely different design types, appropriate for their use in different installations:

  • The TTR ERM 2×00 scale drums for precise axes in turning and milling applications
  • The TTR ERM 2×04 and TTR ERM 2×05 scale drums for spindle applications

Furthermore, various grating periods are available for the scale drums, depending on the speed and accuracy requirements.

Angle encoder modules from HEIDENHAIN are combinations of angle encoders and high-precision bearings that are optimally adjusted to each other. They are characterized by their high degree of measuring and bearing accuracy, their very high resolution, and the highest degree of repeatability. The low starting torque permits smooth motions. Due to their design as completely specified and tested composite components, handling and installation is very simple.

Rotary Encoders

Mounting variants

In rotary encoders with integral bearing and stator coupling, the graduated disk of the encoder is connected directly to the shaft to be measured. The scanning unit is guided on the shaft via ball bearings, supported by the stator coupling. During angular acceleration of the shaft, the stator coupling must absorb only that torque resulting from friction in the bearing, thereby minimizing both static and dynamic measuring error. Moreover, the coupling mounted on the stator compensates axial motion of the measured shaft. Other benefits of the stator coupling are:

  • Simple mounting
  • Short overall length 
  • High natural frequency of coupling 
  • Hollow-through shaft possible

Rotary encoders with integral bearing

HEIDENHAIN ERN, ECN and EQN rotary encoders with integral bearing and mounted stator coupling are characterized by simple mounting and short overall length. Possible applications range from simple measuring tasks to position and speed control on servo drives. The hollow shaft of these encoders is slid directly onto and fastened to the shaft to be measured.

ROD, ROC and ROQ rotary encoders from HEIDENHAIN have their own bearings and are sealed. They are robust and compact. These encoders are coupled by the rotor to the measured shaft through a separate coupling that compensates axial motion and misalignment between the encoder shaft and measured shaft.

Rotary encoder without integral bearing

In addition to the system accuracy, the mounting and adjustment of the scanning head normally have a significant effect on the accuracy that can be achieved with rotary encoders without integral bearings. Of particular importance are the mounting eccentricity and radial runout of the measured shaft.

The ECI/EQI 1300 inductive rotary encoders with EnDat01 are mechanically compatible with the ExN 1300 photoelectric encoders. The taper shaft (a bottomed hollow shaft is available as an alternative) is fastened with a central screw. The stator of the encoder is clamped by an axially tightened bolt in the location hole.

HEIDENHAIN is supplementing its existing program of inductive position encoders with its rotary encoder series ECI 4000/EBI 4000. The variants are modular devices without integral bearing and with a 90 mm hollow shaft. They enable you to replace the conventional toothed-belt drive for coupling a motor feedback system to torque motors.