A pyramid-shaped machining test to identify rotary axis error motions on five-axis machine tools: Software development and a case study
Soichi Ibaraki, Shota Tsujimoto, Yu Nagai, Yasutaka Sakai, Shigeki Morimoto, Yosuke Miyazaki
Abstract
The pyramid-shaped machining test was proposed
to evaluate error motions of a five-axis machine
tool. This paper presents software to perform and analyze
the pyramid-shaped machining test. The paper presents an
extension of the analysis algorithm to a five-axis machine
tool with two rotary axes on the tool side. An experimental
case study shows that position and orientation errors (location
errors) of rotary axis average lines, as well as positiondependent
error motions of a rotary axis, can be numerically
identified from geometric errors of the finished test piece.
Experimental demonstration of the numerical compensation
of rotary axis geometric errors based on the R-test
is also presented, along with its performance investigation
by the present machining test. The developed software is
commercially available.
Keywords: Five-axis machine tool, Machining test, Metrology, Error calibration, Geometric error
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