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  • Topics in Modal Analysis II, Volume 8
    Each mass carriage suspension has anti-friction ball bearing systems and, therefore, the linear dashpots are included only to describe small viscous dampings. Each mass carriage has a ( rotary ) high resolution optical encoder to measure its actual positions via cable-pulley systems (with effective resolutions of 2,266 pulses/cm or 4.413 10 3 mm /pulse).
  • Actuators For A Segmented Mirror Control System
    2.3 Integral Bearing Roller Screw The heart of the actuator is the integral bearing roller screw. It provides a smooth, low friction, high load capacity mechanism for converting rotary to linear motion with 3 mm dynamic range yet resolution at the 4 nanometer level.
  • Rolling Friction in a Micro Tribosystem
    The viscoelastic model was applied to the rolling contacts from the linear microball system used in [1 � Ghalichechian et al. [ 3 ] experimentally determined the friction coefficient in an encapsulated rotary microball bearing mechanism using microfabricated silicon and stainless steel microballs of 0.285- mm diameter.
  • ZASMHBA0005252
    � area: 12,900 mm2 (20 in.2) Weight: 0.5�135 kg (1�300 lb) steels Section thickness: 3.2�9.5 mm (1/ 8�3/ 8 in.) Overall linear dimension: 205�255 mm (8�10 in.) Maximum boss � � flat area: 1935 mm2 ( 3 in.2) Weight: 31�373 � Valve bodies, pump casings, transmission casings, pintles, plates, rotary cams, pump impellers, bearing housings, crankshafts .
  • Comprehensive review of micro/meso-scale machine tools
    The 5-axis machine tool with travel of 40 mm in the X-, Y- and Z-axis, 180� � � 360� in the C-axis, utilizes brushless AC linear and rotary motors, 20nm resolution optical � � rotary encoders and air bearing spindle with maximum speed � A micro gear is finished by the 3 -axis machine tool(Figure 10)13 .
  • Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools
    Figs. 10 and 1 1 show one model in the range, a 3 axis CNC aspheric generator of 250 mm diameter capacity. The machine incorporates many features found vital in the development machines previously briefly mentioned: - high loop stiffness provided by a combination of oil hydrostatic bearings (both linear and rotary ) and a bridge type configuration similar to the grinding machine currently in use .
  • Study on ultrafine machining of a complex microlens mold with a lenticular pattern on an aspherical surface
    The machine has an ultra-precision air- bearing spindle, three perpendicular linear tables (X- , Y- and Z-axes) with a straightness of 0.3 �m, a spindle radial error of under 12.5nm, and a rotary table (B-axis) having a radial � Every axis has a resolution better than 3 nm, and the maxmum diameter of a machinable workpiece is 500 mm .
  • PTB radiometry laboratory at the BESSY II electron storage ring
    The newer of the two systems can hold samples up to 250 mm in diameter. A double concentric linear and rotary ball bearing guarantees coincidence of the axes of rotation for the sample and the detector but admitting independent linear and rotary motion with a resolution and reproducibility of 3 im and 0.001�, respectively.
  • Design, qualification, and acceptance of the front-door mechanisms for the OSIRIS experiment of the Rosetta mission
    The cam mechanism (shown in fig.2) transform the rotary motion of the motor, in three sequence of motion: 1) translation of 3 mm , 2) rotation of 90� and translation of -3 mm according to the Z axis. This is obtained thanks to the following items that compose the double cam itself: a) two cams; b) a set of preloaded ball bearings to support the inner cam; c) one peg � � bearings self lubricated, to drive the shaft during linear motion.
    � slideways with 2,000,000 lbs./in. stiffness (350N/�m) � Linear motor drives for rapid � � rpm �heavy-duty� air bearing workspindle (with liquid cooling � � capacity: 10� diameter (250 mm ), X & Z slide � � include vertical Y-Axis, rotary B-Axis, C-Axis � Moore Nanotech� 250UPL Ultra-Precision Diamond Turning Lathe (Configurable as a 2, 3 , or 4 axis machine .