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  • Proper Shaft Fits for Precision Coupling Devices
    and the bore. But when it comes to high-performance / high-speed drives and "smart" motors, such as servo and steppers, shaft fit becomes increasingly important.
  • Sorting out shaft connections
    Motors and gearboxes that generate high torque and acceleration may make shaft keys obsolete. Designers should analyze stresses and backlash when weighing keyed versus keyless shafts. Stresses in the keyway are critical in evaluating the shaft's torque capacity. Opposing forces exerted by the shaft
  • Coupling Motion Systems for Zero Backlash
    is the zerobacklash coupling that connects a motor to a linear stage. For instance, a coupling might connect a servomotor to a ball screw that drives a vision system used for inspection. * Mechanical couplings used in precision motion systems require a trade-off between damping and rigidity. * Different
  • Stator Coupling Model Analysis - White Paper (.pdf)
    to connect encoders to the motor shafts (rotor part), whereas a stator coupling is used to connect encoders to the motor housing (stator part). A rotor coupling rotates together with the motor shaft whereas a stator coupling remains static during the operation of the motor. Proper coupling design
  • Definite and Special-Purpose Motors
    of a gear-reduction unit with an integral or flange-mounted rotor. The main advantage of a gearmotor is that the driving shaft may be coupled directly to the driven shaft. Belts, pulleys, chains, or additional gearing to step down motor speed are not needed. Also, coupling or belting of a motor
  • Direct-drive motors: Fast And Accurate
    The fundamentals of motor design have changed little over the course of time, but the technologies used to improve tolerances, and implement new assembly techniques, materials, and stator and rotor geometries are constantly evolving. Direct-drive motors meet the high-torque needs of large inertia
  • Eliminating compliance in servosystems
    A traditional motor-mounting arrangement consists of a housed motor coupled to a lead or ball-screw shaft by a flexible coupling and a motor mount. A direct drive consists of a rotor assembly fabricated directly on the ball screw, eliminating duplicate motor parts, compliant couplings, and brackets
  • What to look for in a servocoupling
    Torque, shaft misalignment, stiffness, rpm, and space requirements are some of the factors to consider when selecting a coupling for servo applications. Servocouplings come in a variety of designs but all have zero backlash. Servocouplings are typified by their ability to transmit torque with zero

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