<title>Design And Construction Of A Large, Vertical Axis Diamond Turning Machine</title>

Abstract

A 64 -inch swing, vertical spindle axis precision lathe has been constructed. The machine incorporates a multiple -path laser feedback system, capacitance gauges, a 32 -bit computer and capstan drives to provide two axes of tool motion in a 32 -inch radius by 20 -inch length working volume. Dimensional stability of critical components is achieved through the use of low coefficient -of-thermal-expansion materials and temperaturecontrolled heat sinks. Projected accuracy of the machine is approximately one microinch rms.

Diamond micro engraving of gravure roller mould for roll-to-roll printing of fine line electronics

“…In 1983, Donaldson and Patterson (1983) reported the completion of the world's most precise machining system, Large Optics Diamond Turning Machine (LODTM), which is constructed by Lawrence Livermore National Laboratory. An ultraprecision machining system could provide high axis motion accuracy, minimum drifting of tool/workpiece position, nanometer movement resolution, and accurate control of tool path and instantaneous tool position.…”

Virtual technologies for advanced manufacturing and metrology

“…In the quest for improved accuracy, designs have emerged that completely separate the load-bearing structure from the structure on which the geometry-defining systems are mounted , Donaldson and Patterson 1983, Bryan and Carter 1979, Bryan 1997, Becker and Heynacher 1987, Donaldson and Maddux 1984, Teague 1996, Wills-Moren and Wilson 1989) so that the weight of the component has no influence on the geometry of the CMM. This is called a 'metrology frame'.…”

Micro-machining

“…Many specialized ultra-precision machines have been constructed which surpass the accuracy of commercially available equipment. The large optics diamond turning machine built at the Lawrence Livermore National Laboratories (figure 2) with a contouring accuracy less than 0.1 mm over 812.8 mm is supposed to be the most precise machine in the world [12]. Other special purpose machines have been built for diamond turning of large mirrors up to 2032 mm diameter [13], Fresnel lenses up to 1950 mm diameter, precision drums up to 2000 mm in length [11] and mandrels for the production of Wolter mirrors for X-ray telescopes [14].…”