Angle Measurement RCN, RON, RPN Angle Encoder
with integral bearing and integrated stator coupling
SEALED LINEAR ENCODERS
Angle encoders
HEIDENHAIN angle encoders are
characterized by high accuracy
values in the arc second range
and better. These devices are
used in applications such as
rotary tables, swivel heads of
machine tools, dividing app-
aratuses, high-precision angle
measuring tables, precision
devices in angular metrology,
antennas and telescopes.
Line counts typically 9000 to 180000
Accuracy from ± 5" to ± 0.4"
Measuring steps as fi ne as 0.000 005° or 0.018" (incremental) or 29 bits, i.e. approx. 536 million positions per revolution (absolute)
Because of their high static and dynamic accuracy, the RCN, RON and RPN angle encoders with integral bearings and stator couplings are the preferred units for highprecision applications such as rotary tables and tilting axes. For the units with stator coupling, the specifi ed accuracy includes the error caused by the coupling. For angle encoders with separate shaft coupling, the coupling error must be added to find the system accuracy.
RCN/RON 200 Series
Compact design
Sturdy design
Typically used with rotary tables, tilting tables, for positioning and
speed control
Measuring steps to 0.0001°.
Versions in stainless steel (e.g. for antennas) available on request t
RCN/RON 700 Series and RCN/RON/RPN 800
Large hollow shaft diameter up to 100 mm
Measuring steps to 0.00001° with system accuracy grades of ± 2“ and ± 1“
Typically used on rotary and angle measuring tables, indexing fi xtures,
measuring setups, image scanners
Versions in stainless steel (e.g. for antennas) available on request
RON 905
Very high-accuracy angle encoder
Measuring steps to 0.00001°.
System accuracy ± 0.4“
Used with high-accuracy measuring devices and for the inspection of
measuring equipment
ROD Angle Encoders
with integral bearing, for separate shaft coupling
ROD angle encoders with solid shaft for separate shaft coupling are particularly attractive for applications where high shaft speeds and large mounting tolerances are required. The precision shaft couplings allow axis motion up to ± 1 mm. For angle encoders with separate shaft coupling, the angular measuring error caused by the shaft coupling must be added to determine the system accuracy.
CC ROD 200 Series
Compact design
Sturdy design
Typically used with rotary tables,
tilting tables, for positioning and
synchronization monitoring
Measuring steps to 0.0001°.
ROD 780 and ROD 880
High accuracy
± 2“ (ROD 780) or
± 1“ (ROD 880)
Measuring steps to 0.00005°
Ideal for angle measurement on
high-precision rotary tables, dividing
apparatuses or measuring machines
ERP 880
Very high accuracy
Very fi ne grating period
Low error within one signal period
thanks to the interferential scanning
principle
ERA Angle Encoders
without integral bearing
The HEIDENHAIN ERP angle encoders without integral bearing are intended for integration in machine elements or components. They operate without friction and permit high accuracy. This makes them particularly attractive for high-precision
angle measuring tables and precision devices in angular metrology. The ERP 4080 and ERP 8080 angle encoders are designed for applications in the clean room.
The attainable system accuracy depends on the eccentricity of the graduation to the drive shaft bearing, as well as the radial runout and wobble of the bearing.
ERP 880
Very high accuracy
Very fi ne grating period
Low error within one signal
period thanks to the inter-
ferential scanning principle
ERA 4000 Series
High shaft speeds up to 10 000 min–1
Sturdy design with steel scale drum
Axial motion of measured shaft permissible up to ± 0.5 mm
Typical application on fast spindles and ball screws
The ERA 4480 C is available for larger diameters or versions with protective cover
Various drum versions
ERA 4x80 C: solid version with centering collar for high speeds
ERA 4x81 C: with T-section for 3-point centering with low weight and low
moment of inertia
ERA 4282 C: solid version with 3-point centering for high accuracy requirements
ERA 700 and ERA 800 series
For very large diameters up to 10 m
AURODUR steel scale tape
High accuracy even at the junction of the scale-tape ends
ERA 700 Series
Scale tape is placed in a slot on the inside circumference of the machine element
ERA 780 C: full-circle version
ERA 781 C: circle-segment version
ERA 800 Series
Scale tape is fastened on the outside circumference of the machine element
ERA 880 C: full-circle version
ERA 881 C: segment, scale tape secured with tensioning elements
ERA 882 C: segment, scale tape secured without tensioning elements
ECN, EQN, ERN Rotary Encoders
with integral bearing and mounted
stator coupling
Protection IP 64
Rotary encoders
Rotary encoders from HEIDENHAIN serve
as measuring sensors for rotary motion,
angular velocity and also, when used in
conjunction with mechanical measuring
standards such as lead screws, for linear
motion. Application areas include electrical
motors, machine tools, printing machines,
woodworking machines, textile machines,
robots and handling devices, as well as
various types of measuring, testing, and
inspection devices.
Line counts of typically 50 to 5000
Accuracy from ± 12" (depending on the line count, corresponding to ± 1/20 of the grating period)
Measuring steps to 0.001°. The high quality of the sinusoidal incremental signals permits high interpolation factors for digital speed control.
HEIDENHAIN ECN, EQN and ERN 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. During angular acceleration of the shaft, the stator coupling must absorb only that torque caused by friction in the bearing.
Rotary encoders with stator coupling therefore provide excellent dynamic performance and a high natural frequency.
ECN, EQN, ERN Rotary Encoders
with integral bearing and mounted stator coupling
Protection IP 40
The HEIDENHAIN ECN, EQN and ERN rotary encoders with IP 40 degree of
protection are specially designed for integration in motors. Bearings and
mounted stator coupling are integrated. Absolute rotary encoders and versions with commutation tracks are available for synchronous motors. The taper shaft or the blind hollow shaft is fastened directly to the shaft to be measured. This ensures an extremely stiff coupling that permits
exceptionally high dynamic performance of the drive. The stator coupling is designed to be fastened in a location bore and permits fast, simple mounting while enabling a mechanical fi ne adjustment of the commutation.
ECN, EQN, ERN 1100 Series
Miniaturized version
Blind hollow shaft ¬ 6 mm
Housing outside diameter 35 mm
Stator coupling for location holes with inside diameter 45 mm
Natural frequency of the encoder stator coupling: ‡ 1500 Hz
Mech. permissible speed: 12 000 min–1
ECN, EQN, ERN 1300 Series
Compact dimensions: 1:10 taper shaft with 9.25 mm functional diameter for extremely stiff connection
Housing outside diameter 56 mm.
The stator coupling is suited for location holes with 65 mm inside diameter
Natural frequency of the encoder stator coupling: ‡ 1800 Hz
Mech. permissible speed
– ERN/ECN: 15 000 min–1
– EQN: 12 000 min–1
IP 40 protection when mounted
ROC, ROQ, ROD and RIC, RIQ Rotary Encoders with integral bearing, for separate shaft coupling
The optical encoders ROC, ROQ and ROD, as well as the inductive RIC and RIQ from HEIDENHAIN have integrated bearings and are sealed. They provide IP 64 to IP 67 protection, depending on the version. 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.
ROD 1000 Series
Miniaturized dimensions for installation in small devices or in limited installation space Mounting by synchro fl ange Shaft diameter 4 mm
ROC, ROQ, ROD 400 Series
Industrial standard for dimensions and output signals
Protection
IP 67 at housing
IP 64 at shaft inlet (IP 66 upon request)
Mounting by synchro fl ange or clamping fl ange
Shaft diameter
6 mm with synchro fl ange
10 mm with clamping fl ange
Preferred types with fast delivery
(see Rotary Encoders brochure or ask HEIDENHAIN)
RIC/RIQ 400 Series
Inductive scanning principle
For reduced accuracy requirements
up to ± 480“
Mechanical design same as
ROC/ROQ 400
ECI, EQI, ERO Rotary Encoders
without integral bearing
The ECI/EQI inductive rotary encoders are mechanically compatible with the photoelectric encoders ExN: the shaft is fastened with a central screw. The stator of the encoder is clamped in a location hole. The photoelectric ERO modular rotary encoders from HEIDENHAIN consist of a graduated disk with hub and a scanning unit. They are particularly well suited for
limited installation space or for applications for which there must be no friction.
ECI/EQI 1100 Series
Mechanically compatible with
ECN/EQN 1100
Easy mounting without adjustment
Blind hollow shaft ¬ 6 mm
ECI/EQI 1300
ERO 1200/1300
ERO 1200 Series
Compact design for shaft
diameters up to 12 mm
ERO 1300 Series
For large shaft diameters up to 30 mm
Lateral mounting of scanning unit possible with through shaft
ERO 1400 Series
Miniaturized modular rotary encoders for shafts up to ¬ 8 mm
Special integral mounting aid with cover cap
ERO 1400
ECI/EQI 1300 Series
Mechanically compatible with ECN/EQN 1300
Taper shaft or blind hollow shaft
