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  • Guide To Understanding Newall's Spherosyn and Microsyn Linear Feedback Encoders
    of mass-produced ball bearings. The Spherosyn TM encoder is made up of two main assemblies, the reader head and the scale. The scale is a length of stainless steel tube housing a column of precision steel balls. The balls are maintained under compression, the compression load being set during
  • Advanced photonics will ride on air
    to less than 3 arc-seconds. The PicoDrive is a servoamplifier whose digitally controlled PWM current loop can move and settle to less than 30 nm in directdrive, air-bearing stages. Linear servoamplifiers can deliver fast move and settle times and keep jitter levels below 3 nm. One in this category
  • A Primer on Displacement Measuring Interferometers
    A Displacement Measuring Interferometer (DMI) measures linear and angular displacements with very high accuracy and precision. DMI's are used in a variety of applications which can be broken into two broad categories: • high resolution real time position control systems, such as those used
  • Tiny Motors Make Big Moves
    move at linear speeds up to 100 mm/sec. Different models include designs for vacuum and nonmagnetic applications. Various sizes can handle pulling forces from one to several hundred Newtons. Moreover, the simple design supports mass production while still maintaining a high degree of precision
  • Positioning in nanometers
    on top of linear cross-roller or air-bearing stages that provide coarser positioning. This combination of elements lets the system use a primary stage to move into the general vicinity of interest, then employ the secondary piezoelectric stage for final subnanometer moves. There
  • Sponge wrings cost from MR-fluid devices
    cycling machines. Active-vibration-control seats for large, Class 8 trucks reduce driver fatigue, adjustable-rate shock absorbers improve race car handling, and pneumatic actuators fitted with feed-back-controlled rotary brakes and linear dampers move loads more precisely than previously possible

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