Heidenhain: Absolute Rotary Encoder 811811-02 (ECI 1319)

Absolute modular rotary encoder (singleturn) with inductive scanning without integral bearing

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:

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:

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 inductive rotary encoders ECI/EQI 1300 are mechanically compatible with the photoelectric encoders ExN 1300: the shaft is fastened with a central screw. The stator of the encoder is clamped by an axially tightened screw in the location hole. The photoelectric ERO modular rotary encoders from HEIDENHAIN consists 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 1300 Features:

ECI 1319 ( ID: 811811-02 )

Absolute modular rotary encoder (singleturn) with 
inductive scanning without integral bearing
Positions per           
revolution:             524288
Data interface:         EnDat01
Output code:            Binary
Line count:             32
Output signal:          ~1Vpp
Cutoff frequency (-3    
dB):                    6.00 kHz
Power supply:           4.75 V ... 10 V
Flange version:         Housing with eccentric 
                        clamping, Ø 65 mm
Shaft:                  Tapered shaft 1:10, 
                        functional diameter 9.25 
                        mm
Degree of protection:   IP 20 (EN 60529)
Operating temperature:  -20/+115 °C
Electrical connection:  Plug connector, straight, 
                        double-row, 12-pin, with 
                        locking mechanism and 
                        walls
Pin configuration:      D323746
Connecting direction:   Cable outlet for axial and
                        radial use
Included part:          Screw M5 x50 -8.8 ISO 4762
                        with Tuflok