1. RCN, RON, RPN series Angle encoders - with built-in bearings and stator couplings

Due to the high static and dynamic accuracy of the RCN, RON, and RPN series Angle encoders with built-in bearings and stator couplings, they are ideal for high-precision applications such as rotary tables and swinging shafts. The measurement reference is the circular grating code disk of the DIADUR grating - the RPN is the phase grating. Encoder accuracy with stator coupling includes coupling errors. If the Angle encoder is a separated coupling, the connection error must be considered when calculating the system accuracy.

2. ROD series Angle encoders - with built-in bearings, separate coupling 

Solid shaft separate coupling ROD series Angle encoders are especially suitable for high-speed rotating shaft and require large installation tolerances applications. Precision couplings allow ±1mm axial clearance. ROD Angle encoder uses DIADUR circular grating code disc as measuring base. The Angle measurement error caused by the coupling must be taken into account when calculating the accuracy of the system in the Angle encoder of the separated coupling. 

3. ERP series Angle encoders - no built-in bearing 

Heidehain ERP series Angle encoders without built-in bearings are suitable for installation in machine parts or parts. It works without friction and with high precision. Especially suitable for high precision angle measuring table and angle precision measuring equipment. The ERP 4080 and ERP 8080 angle encoders are designed for ultra-clean shop floor applications. Phase grating disc is the basis of high precision ERP series encoder. The accuracy of the system depends on the coaxiality between the circular grating code disc and the drive shaft bearing, as well as the radial runout and axial runout. 

4. ERO, ERA Series Angle encoders - No built-in bearings 

The ERO and ERA series angle encoders of Heidehan's solid round grating coders do not have built-in bearings. Designed for use in machine parts or components. The accuracy of the system depends on the coaxiality between the circular grating code disc and the drive shaft bearing, as well as the radial runout and axial runout. ERO series angle encoder with wheel hub glass circle grating code disc as the matrix. The ERO series angle encoders are characterized by their light weight and compact structure. Mainly used in metering equipment, small rotary table, high precision and high dynamic performance drive applications. The ERA series angle encoders are high-strength steel band grating drums for high shaft speed applications up to 10,000 RPM. Mainly used for high speed spindle, rotary table and swing shaft. 

5. ERA series angle encoder - no built-in bearing 

Heidehan ERA series angle encoder measurement base is steel strip grating ruler, no built-in bearing. Designed for use in machine parts or components. The following requirements can be met: 

• Large hollow shaft diameter, up to 10m diameter 

• No additional starting torque brought by shaft seal 

The final system accuracy is related to the machining accuracy of the steel strip grating ruler diameter, radial runout and shaking. 

6. ERM modular magnetic gate encoder - no built-in bearing 

Heideham's ERM series modular encoder consists of a magnetic gate drum and a reading head. Its MAGNODUR measurement reference and magnetoelectric scanning principle make the encoder particularly insensitive to contamination. Typical applications include machines with small precision requirements and large hollow shafts, operating environments with large amounts of vaporized particles and liquids, such as: 

• Rotating and swinging shafts for ERM 2200 

• Lathe C-shafts for ERM 200 and ERM 2410 

• Milling machine spindles for ERM 2900 and ERM 2400

1. RCN 2000, RCN 5000 and RCN 8000 series Angle encoder features: 

• High quality scanning, large area scanning of absolute signal track (sequence coded structure) with incremental signal track (single field scanning and optical filtering) 

• large installation tolerances, Because the stator couplings have high torsion-resistance and good shaft sealing performance 

• Plug-in cables that can be quickly separated 

• Scanning and signal processing electronics allow for a wide range of power supply and have monitoring and diagnostic functions 

2. RCN 2000 and RON 200 series 

• Compact structure 

• Robust design 

• Mainly used for positioning and speed control of rotary and oscillating tables

 • Stainless steel plates are available on request (e.g. for antennas) 

3. RCN 5000 Series 

• Large hollow shaft, small installation space required 

• Stator installation size compatible with RCN 2000 and RON 200 

4. RCN 8000, RON 700 and RON/RPN 800 series 

• Large hollow shaft, Diameters to ¬ 100 mm

• System accuracy ± 2" and ± 1" 

• Mainly used for rotary tables and Angle measuring tables, indexing devices, measuring instruments and image scanners 

5. RON 905 series

• Ultra-high precision Angle encoders 

• System accuracy ±0.4"

 • Used for inspection of high-precision measuring equipment and measuring equipment 

6. ROD 200 series 

• Compact structure 

• Robust design 

• Mainly used for rotary table, swing table positioning and synchronous monitoring 

7. ROD 780 and ROD 880 

• High precision ROD 780: ±2" ROD 880: ±1" 

• Especially suitable for Angle measurement of high-precision rotary tables, indexing devices or measuring machines 

8. ERP 880 series 

• Ultra-high precision 

• minimal grid spacing

• Due to the interference scanning principle, Small error in a single signal cycle 

9. ERP 4080 and ERP 8080 series

• Ultra-high resolution 

• High precision 

• Very compact structure 

• Due to the interference scanning principle, Low error within a single signal cycle 

10. ERO 6000 Series 

• Extremely low height 

• High system accuracy 

• Simple installation 

11. ERO 6100 series 

• High speed and limited accuracy requirements 

• Applications include printing presses and delivery shafts. 

• Large internal diameter 

12. ERA 4000 series 

• High shaft speed, up to 10000rpm 

• METALLUR grating steel grating drum, rugged 

• Axial clearance of the shaft under test up to ±0.5mm 

• ERA 4480 Type C Angle encoder for large diameter applications, available in versions with guard cover 

• Multiple raster drum versions 

ERA 4x80C: Solid raster drum with centring ring for high axial speed applications 

ERA 4282C: High precision applications with 3-point solid grating drum 

13. ERA 7000 and ERA 8000 series 

• Large diameter up to 10m 

• METALLUR steel grating ruler 

• High precision, The same high precision 

14. ERA 7000 series 

steel strip grating ruler is installed in the inner circular groove of the machine part 

• ERA 7400C: Round plate 

• ERA 7401C: Non-round plate 

15. ERA 8000 series 

steel grating ruler fixed on the circumference of the machine parts 

• ERA 8400C: full round plate 

• ERA 8401C: Non-round plate, steel grating ruler fixed with tension elements 

• ERA 8402C: Non-circular version, steel strip grating ruler is fixed without tension element 16. ERM 2200 series 

• High precision 

• Signal period 200µm, at the circumference 

• distance from the coded reference point 

• Magnetic grid drum is fixed with axial screws 

17. ERM 200 series 

• Large diameter shaft, Up to 410 mm 

• Magnetic grid drum fixed with axial screws 

18. ERM 2410 series 

• Includes ERM 2410 reading head and ERM 200C magnetic grid drum 

• Incremental measurement with distance coded reference point 

• Counting function, Output absolute position value 

• Output absolute position value after moving two reference points 

19. ERM 2400 series 

• Ultra-small construction, especially suitable for applications with limited mounting space 

• High mechanical allowable shaft speed, therefore especially suitable for spindle applications 

• ERM 2484: magnetic grid drum axial fixation 

• ERM 2485: The magnetic gate drum is axially clamped and secured by a guide key to prevent rotation 

20. ERM 2984 series

The mechanical and electrical parameters of the ERM 2984 modular magnetic gate encoder are the same as those of the ERM 2484, except for the wire number parameters.

Angle encoders and rotary encoders with built-in bearings and stator couplings, whose circular grating coders are directly connected to the measured axis. The reading head is mounted on the shaft via ball bearings and supported by a stator coupling. Therefore, the coupling must absorb only the torque caused by bearing friction, especially during angular acceleration of the shaft. As a result, these angle encoders have excellent dynamic performance. Due to the stator coupling, the coupling error is included in the system accuracy. Other advantages of stator couplings include: 

• Simple installation 

• Short overall length 

• High natural frequency of couplings 

• The use of hollow shaft

 Built-in bearing angle encoders and rotary encoders connected with separate couplings is used for solid shafts. This recommended connection of the measured axis compensates for radial and axial errors. Angle encoders for split couplings support higher shaft speeds. No built-in bearing angle encoders and rotary encoders work without friction. The assembly requires the adjustment of two components to each other - the reading head and the round grating code plate, the grating drum or the steel strip grating ruler. Advantages: 

• Small space required 

• Large diameter hollow shaft 

• Allows high shaft speed 

• No additional starting torque 

Incremental angle encoders and rotary encoders determine the current position by calculating the number of measurement steps from the origin, or by calculating the number of signal cycles after subdivision processing. Heidenhain's incremental encoder has a reference point to reconstruct the origin. The incremental rotary encoder with commutation signal provides the axial angle position value without the need to perform a return to zero, which is accurate enough to correctly control the phase of the rotating magnetic field of the permanent magnet three-phase motor. Absolute angle encoders and rotary encoders can provide the current position value directly without performing a reference point return to zero operation. The single-turn encoder provides the current angular position value with only one turn, while the multi-turn encoder can also distinguish the position between different turns. Location values are transmitted via EnDat, SSI, PROFIBUSDP, PROFINET, or other serial data interfaces. The EnDat bidirectional interface, PROFIBUS-DP or PROFINET support automatic configuration of the upper layer electronics and provide monitoring and diagnostic functions. Heidenhain encoders with functional safety features are single-encoder systems using pure serial data transmission for high-security machine tools and systems. Two independent measurements are formed in the encoder and transmitted to the safety control system through the EnDat interface.