Incremental Modular Angle Encoders

Name Line count System accuracy
ERA 780C 36000 ± 3,5''
ERA 780C 45000 ± 3,4''
ERA 780C 90000 ± 3,2''
ERA 780C    
ERA 781C  
ERA 781C  
ERA 781C 160°: 20000  
ERA 781C    
 
ERA 

ERA 780, ERA 880
Shown below: ERA 780

ERA 790 / 880 Angle Encoders ERA 880
ERA 790 / 880 Angle Encoders
  ERA 780
ERA 790 / 880 Angle Encoders
   
The ERA 780 and ERA 880 incremental modular angle encoders feature an AURODUR steel scale tape as measuring standard. On the ERA 780, the scale tape is place in a slot in the inside circumference of the hollow shaft. The scale tape of the ERA 880 is fastened on the outside circumference of the measured shaft.

 

  ERA 780/ERA 880
Incremental signals  1 VPP
Grating period 40 µm
Resulting line count
ERA 780: 36 000 at D1 = 458.62 +0.02 mm
  40 000 at D1 = 573.20 +0.03 mm
  90 000 at D1 = 1146.10 +0.06 mm
ERA 880: 45 000 at D1 = 572.63 -0.03 mm
Recommended measuring steps 0.0001°, 0.001° depending on the scale-tape-mount diameter and signal interpolation

 

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