ABSTRACTS, cont.

LDV-based spindle metrology for ultra-high-speed micromachining spindles
NAMRC41-1621
Sudhanshu Nahata, K. Prashanth Anandan, Burak Ozdoganlar, Carnegie Mellon University, Pittsburgh, PA, United
States
This paper presents a laser Doppler vibrometer (LDV)-based technique to measure accurately the radial error
motions of a miniature ultra-high-speed spindle. The measurements are made from the surface of a custom
fabricated sphere-on-stem artifact. The form error of the artifact is separated and removed from the measurements
by adapting the multi-orientation error separation technique. Measurements are made for two different spindle
speeds, viz., 50 krpm and 80 krpm. The validity of the multi-orientation implementation is concluded from the
fact that the artifact form error obtained at the two spindle speeds were nearly same, with the radial spindle error
motions being considerably different.
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