It is
noted that the trajectory of the
target is not a straight line, and
the lateral movement is rather large. Hence a conventional laser interferometer
will be way out
of alignment with such large lateral
displacement. However, with a single
aperture laser
head and a flat-mirror as target,
large lateral movement can be
tolerated and the
displacement along the laser beam direction measured.
IV.
A comparison with
conventional method A comparison with the old method is shown
in the table below. Table of comparison, MCV-5002 and old
methodsCMM Errors Degree
Of Freedom Axis
of Motion Axis
of Rotation Using MCV-500 Method
of MeasurementNumber
of setups Old
Method of
Measurement
Number of setups
1 X
X levels 1
2 Z
X Flat-mirror 1 Angular Laser 1
Y
X Flat-mirror 1
Angular laser 1 4 Y Y levels 1
5 Z
Y Flat-mirror 1
Angular laser 1 6 X Y Flat-mirror 1
Angular laser 1 7 Z Z Offset probe 1
8 Y
Z Flat-mirror 1
Angular laser 1 Angles
9 X
Z Flat-mirror 1
Angular laser 1 10 X Linear laser 1
11 Y
Linear laser 1
Linear 12 Z Linear laser
1 Direction13 X Y Wollensten Prism 1
14 X
Z Wollensten Prism 1
15 Y
X Wollensten Prism 1
16 Y
Z Wollensten Prism 1
17 Z
X Wollensten Prism 1
Straight-
ness 18 Z Y Wollensten Prism
1 19
XY Wol.Prism opt.Square
1 20 YZ
Wol.Prism opt.Square 1
Perpendi- cularity 21
ZX MCV-500 VOLUMETRIC 4
Wol.Prism opt.Square 1
Total Setups 10 21 In summary, the MCV-5002 is very compact (all
fit into 2 small carrying cases), efficient (measurement in hours instead of
days), flexible (2 separate laser heads can be used together
or separately), versatile (uses small
retroreflector or flat-mirror target), and affordable.
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