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Model
5528A
Str aightn
ess
MeasuremenfS (Along
A
H ori
zo
nt al
Axis)
12. Select
the
sma
ll
aperture
for the laser
Head's
exit
port and repeat
step
"
11
"
.
13.
Secure
the
Reflector
assembly so
it
is
squ
are relative to the
in comin
g
laser
beam within
±
5
degrees.
14.
Reatta ch
the
!argetto the
Interferometer
so
the
hole in
the
Interfe rometer's
targel
is
centered
around the
bea
m.
15.
You
are
now
ready
10
align
the
laser to the
machine's
travel.
Review the
"GUNSIGHT"
mel
hod
of
ali gnment in
Section 15 of
this
User's
Guide.
Your
goa
l
is to
adjust
the
laser Head
to track the Optic's
progression
along
th
e trave
l
path,
while
maintai
ning
the
beam's
near-end-of-travel
position. You
will
do this
by
-
•
Keeping
the bea
m in the small
hole
on
the
Interferometer target,
to
maintain the
beam's
near-end
-of
travel position, and
-
• Keeping
a two-dot pattern
in
line with the
junction of
the
Rertector's
mirrors,
and
sy mmetrical
about
ils
slott
ed open
in
g,
10 match
the
Optic's
travel.
This
will
be
a little
different than aligning
for
Distance
and
Angular measurements,
since
w
ith
these alignments
you
were only
wat
ching
one
dot
relati
ve
to
a
target
cross hai
r.
16.
M
ove
the Optics to the far
end
of
travel.
17.
Rotilile
the
laser Head,
verticall
y
ilnd
hori
zontally,
to keep the two dots
lined
up on the junction
of
the
Refl
ector's
mi
rrors,
and
symmetri
ca
l about its
slotted
openin
g.
(See
Figure
10-7.)
Since
th
e
daIs
wi
ll
move
apart as
the
Optics
move,
you may have
to hold a
card on
each
side
of
the
Reflect
or's
slot
to follow
their
movement.
Figure
10-
7. Two
Dms
on the
Reflector
10-11
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