Mode
l 5526A
Appendix
B:
Measurement Considerations
APPENDIX
B
MEASUREMENT
CONSIDERATIONS
LASER
SYSTEM
MEASUREMENTS
To
fully characterize machine geometry, you need to meas
ure
-
• The
six
degrees
of
freedom for each measurement axi
s,
-
• Squareness between measurement axes, and -
• Parallelism between meas
urement
axes.
The
six
degrees
of
freedom are -
1. Linear displacement
2.
Angular
di
splacement about the meas
urement
axis -
a.
Pitch
b.
Yaw
c.
Roll
3.
Displacement perpendicular to
the
measurement
axis
-
a. Straightness in the vertical plane
b.
Straightness in the horizontal plane.
These
six
variables are used to break
down
the
comp
lex movements
of
a carriage traveling
on
a
pair
of
ways
into
factors which
ca
n be
more
ea
sily handled. (
See
Figure B-1
,)
--
HO
RI
ZO
NTA
L
ST
RA
I
GH
TNE
SS
X AXtS
LIN
EAR
DISPLACEMENT
Figure B-1.
Six
Degrees
of
Freedom
B-1
To Next Page
Loading...
