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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.

Los Alamos National Laboratory, an affirmative actiordequal opportunity empldyer, is operated by the University of California for the U.S. Department of Energy under contract W-7405-ENG-36. By acceptance of this article, the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or to allow others to do so, for U.S. Government purposes. The Los Alamos National Laboratory requests that the publisher identify this article as work performed under the auspices of the US. Department of Energy. Form No. 836 R5 DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.

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