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How do I chose an Encoder from the OsiSense range

There are 7 major things that need to be decided as detailed below:

1 Function

  • Incremental encoder - Provides counting indication.
  • Single turn absolute encoder - Provides absolute position within each revolution.
  • Multiturn absolute encoder - Provides absolute position within each revolution and indicates total number of revolutions.

2 Diameter of housing

  • Incremental encoders - Ø 40, 58 and 90
  • Single turn and multiturn absolute encoders - Ø 58 and 90

3 Diameter of shaft
 

  • Ø 6 mm to 30 mm, depending on model
  • Reduction collars
For Ø 58 and 90 mm encoders, with Ø 14, 15 and 30 mm through shaft, reduction collars are available to reduce the diameters:
  • from 14 to 6, 8, 10 and 12
  • from 15 to 6, 8, 10, 12 and 14
  • from 30 to 12, 16, 20 and 25.
4 Type of shaft
  • Solid shaft
    • The shaft of the encoder is mechanically linked to a drive shaft using a flexible coupling, which eliminates alignment inaccuracies.
       
  • Through shaft/Hollow shaft
    • The encoder is mounted directly on the drive shaft. A flexible mounting kit prevents encoder rotation and compensates for alignment inaccuracies.

5 Connection method
  • Pre-cabled with 2 m long shielded cable or M23/M12 connector.
  • Radial type connection.

6 Resolution

  • Number of points per revolution.
  • Number of revolutions (for multiturn absolute encoders).
  • On Ø 58 parameterable incremental encoders, this resolution can be adjusted using dip switches (multiplication factor up to 16 times on 9 basic resolutions).

7 Type of output

  • Incremental encoders
    • 5 V output driver, RS 422, 4.75…30 V.
    • Push-pull output driver, 5…30 V, 11...30 V.

  • Single turn absolute encoders (depending on model)
    • Push-pull output driver, 11…30 V, binary code or Gray code.
    • SSI output without parity, 13-bit clock, 11…30 V, binary code or Gray code.

  • Multiturn absolute encoders (depending on model)
    • SSI output without parity, 25-bit clock, 11…30 V, binary code or Gray code.

  • Parallel outputs obtainable using converter connecting cables
    • The SSI versions can be converted to a parallel version by using the deserialisation connecting cable.

  • Multiturn absolute encoders, communicating version, fieldbus:
    • CANopen: 11...30 V.
    • PROFIBUS-DP: 11...30 V.
       
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