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  • Direct Drive (DDR) Rotary Table Construction
    mechanical transmission elements and directly couple the payload to the drive. This makes rotary drives with high dynamic responses and no hysteresis possible. The large inner diameter of a torque motor is a big advantage in machine tool design. Large hollow shaft allows designers to design rotary
  • Direct drive leaves gears behind
    , medical diagnostics, imaging, test, and inspection require rotary motion to move lightweight parts. The traditional solution was a mechanical rotary stage, but more of these applications are giving way to direct-drive rotary motion. A direct-drive system improves accuracy and reliability
  • Improving Motion Positioning With Dual-Loop Control and Scurve
    Microscope x-y stages need fast, smooth, and accurate motion for highest performance. In addition, we want to use the most cost effective hardware that can get the job done. What control techniques are available to achieve these goals?. The diagram on page two shows an all-in-one motion card design
  • Wedge drives precision elevator
    with 25-nm resolution. The wedge, an inclined plane, converts horizontal ball-screw movement into vertical elevation of the table top (up to 25 mm), with position feedback provided by either an internal linear or rotary encoder. Vertical-position resolution using a 25-nm linear encoder is 0.025 mm
  • Prime-ratio steppers
    A new stepmotor design boosts efficiency and reduces noise and vibration. Prime-ratio hybrid stepmotors like these look and work exactly like the conventional hybrid versions. But the design of their stator-pole laminations improves motor efficiency while reducing noise and vibration. Conventional

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