Positioning The Tripod And Laser Head - HP 5528A User Manual

Model 5528A
Ph ysica l Set-Up of the laser Head and Tripod
POSITIONING THE TRIPOD AND LASER HEAD
Your choice of where to positi on th e laser Head depends on why you arc making yo ur
measurements, and whe re you ca n moun t your Optics .
• If you arc ca libratin g
iI
machine tool, you w ill probably wa mto make your measurements
as cl ose as possible
to
the area where the tool meets the workpiece .
• If
you are checki ng the accuracy of a machine's distance measuring system , you wil l
prob<lbly wa nt to make you r measurements as d ose as possible to Ihat sys tem, since any
offset between you r measurement axis and the di .. tance measu ring system's axis may
introduce enor. (See "A BB E' E RROR " information in Appendi x U.l
You ca n make all l aser Syste m measuremCnlS for three di ffere nt axes from on ly two set-upsof the
l aser Head. Th ese set- ups are pictured in Figure 4-5.
Table
4-1 shows which measurements can be made with the la se r Head set up in the two positions
shown in Figure 4-5. These measurements arc easil y made (rom these two setups since -
1. All th e Optics have been d esigned around a co mm on ce nt erline, all owin g co mpl ete
interchangeability, for all measurements along an axis.
For Distance and Angular mea sureme nts, you can use all of the same mounting hardware
with no adjustments between measurements.
2. Measu remen1S o n the " z .. axis can be made from ei th er the "x" or "Y" axis by turn ing the
Distilnce and Angular In te rferolll eters o n their sides, or b y using
d
Turning Mirror for
Strai ghtn ess measu rement s. (See th e individual measurement sections in thi s User 's Guid e
for more information aboUi how to do this.l
4-7