Heidenhain: Absolute Rotary Encoders ECN 125
Absolute
rotary encoders • Stator coupling for plane surface • Hollow through shaft
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 that are conceived for separate
shaft coupling are designed with a solid shaft. The recommended coupling to the
measured shaft compensates radial and axial tolerances. Angle encoders for
separate shaft couplings permit higher shaft speeds.
Rotary encoders without integral bearing operate without friction.
The two components - the scanning head and the scale disk, drum, or tape - are
adjusted to each other during assembly. The benefits are:
- Large diameter of hollow shaft
- For high shaft speeds
- No additional starting torque
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.
ExN 100 Features:
- For large shaft diameters
- Hollow-through shaft,
available inside ø: 20 mm, 25 mm, 38 mm, 50 mm
- Housing outside diameter: 87
mm
Model No.: ECN 125
ECN 125 (ID: 810801-06)
Single turn rotary encoder with integral bearing
Positions per
revolution:
33554432
Data interface:
EnDat22
Output code:
Binary
Line count:
2048
Power supply:
3.6 V ... 14 V
Coupling version:
Stator coupling for plane
surface
(hole circle Ø 96
mm)
Shaft:
Hollow through shaft with
eccentric clamping,
diameter 25 mm
Degree of protection: IP
64 (EN 60529)
Operating temperature:
-40/+100 °C
Electrical connection:
Flange socket M12, male,
8-pin
Pin configuration:
D532351
Connecting direction:
radial
Please pay attention to the product documentation!
ECN 125 (ID: 810801-04)
Singleturn rotary encoder
with integral bearing
Positions per
revolution: 33554432
Data interface: EnDat22
Output code: Binary
Line count: 2048
Power supply: 3.6 V ... 14 V
Coupling version: Stator coupling for plane
surface (hole circle Ø
96
mm)
Shaft: Hollow through shaft with
eccentric clamping,
diameter 50 mm
Degree of protection: IP 64 (EN 60529)
Operating
temperature: -40/+100 °C
Electrical
connection: Flange socket M12, male,
8-pin
Pin configuration: D532351
Connecting
direction: radial
Please pay attention to
the product documentation!