Measuring wheel encoders

Items included: BEF-MWS120-ARM (1), BEF-MR010020R (1), AFS60A-S4EB262144 (1)
Copy shortlink
    • Performance
      Number of steps per revolution (max. resolution)262,144 (18 bit)
      Measuring increment (resolution in mm/pulse)0.0008 1) 2)
      Repeatability< 0.1 mm 3)
      • 1) Calculation example: Circumference of wheel / pulses per revolution = 200 mm / 16384 pulses per revolution = 0,012mm/pulse.
      • 2) Value based on measuring wheel circumference. The measuring wheel circumference depends on manufacturing tolerances, wear and tear, the selected spring tensioning force, and the behavior of the measurement wheel surface at different temperatures and on different measurement surfaces. To obtain the most accurate measurement results, we recommend performing a reference run for positioning tasks so that application-specific measuring wheel characteristics can be taken into account.
      • 3) Value is based on the mechanics. Backlash of the measuring wheel mechanics, is at a minimum. This enables a precise and repeatable measurement results.
    • Interfaces
      Communication interfaceEtherCAT®
      Communication Interface detailCoE (CAN over EtherCAT®)
    • Electrical data
      Connection type

      Male connector, 1x, M12, 4-pin, axial

      Female connector, 2x, M12, 4-pin, axial

      Supply voltage10 V DC ... 30 V DC
      Reverse polarity protection
      MTTFd: mean time to dangerous failure80 years (EN ISO 13849-1) 1) 2)
      • 1) This product is a standard product and does not constitute a safety component as defined in the Machinery Directive. Calculation based on nominal load of components, average ambient temperature 40°C, frequency of use 8760 h/a. All electronic failures are considered hazardous. For more information, see document no. 8015532.
      • 2) Value refers to the mounted encoder.
    • Mechanical data
      Measuring wheel circumference200 mm 1)
      Measuring wheel surfaceO-ring NBR70
      MountingMeasuring wheel mounted at the rear
      Spring arm mechanism material
      Spring elementStainless steel
      Measuring wheel, spring armAluminum
      Start up torque0.5 Ncm
      Operating torque0.3 Ncm
      Bearing lifetime3.0 x 10^9 revolutions
      Minimum spring tension force4 N 2) 3)
      Max. permissible working area for the spring (continuous operation)± 10 mm
      Service life of spring element> 1.5 million cycles
      Mounting position relative to the measuring objectPreferably from above, from below possible 4)
      Mounted encoderAFS60 EtherCAT®, AFS60A-S4EB262144, 1059071
      Mounted mechanicBEF-MWS120-ARM, 2118239
      Attached measuring wheelBEF-MR010020R, 2055224
      • 1) The surface of a measuring wheel is subject to wear. This depends on contact pressure, acceleration behavior in the application, traversing speed, measurement surface, mechanical alignment of the measuring wheel, temperature, and ambient conditions. We recommend you regularly check the condition of the measuring wheel and replace as required.
      • 2) The right spring tension force for the application shall keep the slippage at a minimum in the application working conditions and measuring surface, without damaging the measuring surface.
      • 3) The clamping force can be set in 6 fixed increments of 4 N. 4 N corresponds to one increment.
      • 4) When mounted from below, the encoder weight during spring pretensioning must be taken into account.
    • Ambient data
      EMCAccording to EN 61000-6-2 and EN 61000-6-3 1)
      Operating temperature range–30 °C ... +80 °C 2)
      Storage temperature range–40 °C ... +100 °C 2)
      • 1) EMC according to the standards quoted is achieved if shielded cables are used.
      • 2) This value reflects the smallest temperature value of the installed products. For more information, please look at the individual data sheets.
    • Classifications
      eCl@ss 5.027270501
      eCl@ss 5.1.427270501
      eCl@ss 6.027270590
      eCl@ss 6.227270590
      eCl@ss 7.027270501
      eCl@ss 8.027270501
      eCl@ss 8.127270501
      eCl@ss 9.027270501
      eCl@ss 10.027270790
      eCl@ss 11.027270707
      eCl@ss 12.027270504
      ETIM 5.0EC001486
      ETIM 6.0EC001486
      ETIM 7.0EC001486
      ETIM 8.0EC001486
      UNSPSC 16.090141112113

    Technical drawings

    Dimensional drawing
    Dimensional drawing
    Dimensional drawing
    PIN assignment Male connector
    PIN assignment Female connector
    Connection diagram
  • View: View Gallery View List Show all
    Hide all