Measuring wheel encoders

Items included: BEF-MWS120-ARM (1), BEF-MR010030R (1), DFS60B-S4PM10000 (1)
Please note: Encoder is attached to the measuring arm. The measuring wheel is enclosed. See individual components for further technical data
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    • Performance
      Pulses per revolution10,000
      Measuring increment (resolution in mm/pulse)0.03 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 interfaceIncremental
      Communication Interface detailTTL / HTL
      Number of signal channels6-channel
    • Electrical data
      Connection typeCable, 8-wire, universal, 5 m 1)
      Power consumption≤ 0.7 W (without load)
      Supply voltage4.5 V ... 32 V
      Reverse polarity protection
      Short-circuit protection of the outputs2) 3)
      MTTFd: mean time to dangerous failure300 years (EN ISO 13849-1) 4) 5)
      • 1) The universal cable connection is positioned so that it is possible to lay it without bends in a radial or axial direction.
      • 2) Programming TTL with ≥ 5.5 V: short-circuit opposite to another channel or GND permissable for maximum 30 s.
      • 3) Programming HTL or TTL with < 5.5 V: short-circuit opposite to another channel, US or GND permissable for maximum 30 s.
      • 4) 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.
      • 5) Value refers to the mounted encoder.
    • Mechanical data
      Measuring wheel circumference300 mm 1)
      Measuring wheel surfaceSmooth polyurethane surface
      MountingMeasuring wheel mounted at the front
      Spring elementStainless steel
      Measuring wheel, spring armAluminum
      Start up torque0.5 Ncm (at 20 °C)
      Operating torque0.3 Ncm (at 20 °C)
      Bearing lifetime3.6 x 10^10 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 encoderDFS60, DFS60B-S4PM10000, 1036726
      Mounted mechanicBEF-MWS120-ARM
      Attached measuring wheelBEF-MR10300AP, 2118512
      • 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
      Operating temperature range–30 °C ... +80 °C 1)
      Storage temperature range–40 °C ... +100 °C, without package 1)
      • 1) 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
      ETIM 5.0EC001486
      ETIM 6.0EC001486
      ETIM 7.0EC001486
      ETIM 8.0EC001486
      UNSPSC 16.090141112113

    Technical drawings

    Dimensional drawing
    Dimensional drawing
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