THESIS
2016
x, 56 pages : illustrations (some color) ; 30 cm
Abstract
Compared with the traditional 3-axis coordinate measuring machine (CMM), a 5-axis CMM
equipped with the capability of continues sweep scanning can provide much denser data
points while taking much shorter time. This study presents an semiautomatic sweep scan path
planning system that generates a continuous sweep scanning path for the inspection of an
arbitrary free-form surface using a 5-axis CMM with three translational axes and a rotary
head which has two very light rotary axes. The system strives to significantly improve the
scanning efficiency by utilizing the superb kinematic advantages of the two rotary axes,
which have very low moment of inertia, to cover a larger area, while tremendously reducing
the speed and acceleration demand on the three translational axes which hav...[
Read more ]
Compared with the traditional 3-axis coordinate measuring machine (CMM), a 5-axis CMM
equipped with the capability of continues sweep scanning can provide much denser data
points while taking much shorter time. This study presents an semiautomatic sweep scan path
planning system that generates a continuous sweep scanning path for the inspection of an
arbitrary free-form surface using a 5-axis CMM with three translational axes and a rotary
head which has two very light rotary axes. The system strives to significantly improve the
scanning efficiency by utilizing the superb kinematic advantages of the two rotary axes,
which have very low moment of inertia, to cover a larger area, while tremendously reducing
the speed and acceleration demand on the three translational axes which have much larger
inertia. The path is generated from a mesh model of the freeform surface with interactive user
input. In addition, an iterative approach can be used to ensure that the stylus contacts the
surface at an acceptable angle during the entire scan. Physical scanning experiments are
performed and the test results show significant improvement in scanning efficiency by the
proposed sweep scan path planning method when compared with some existing continuous
scanning path planning approaches such as the standard isoparametric or zigzag method.
Post a Comment