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Model
5528A
Alignment
Techniques
The
only alignment
methods that
can
be used for all
measurement
types
are "GUNSIGHT" and
"AUTOREFLECTION".
The
"OVERLAPPING
DOTS" and
"
MAXIMUM MEASUREMENT
READING"
alignment methods are used for
Distance and
Velodty measurements
only.
TRANSLATING AND TURNING THE LASER HEAD
Each
alignment method requires
translational and
turning movements
of the
Laser
Head.
It is
easiest
to
separate
these motions into
vertical
and horizontal components.
You will
use these
adjustments over and over again, so you should
beco
me familiar with them
now,
If
you
haven 't
already
.
This Information
is presented in
Seclion
4,
with Figure 4-3 and
Figure 4-4.
GUNSIGHT METHOD
This method
can
be used for
any
measurement.
Procedure
1.
Attach targets to the Optics as instructed in
each
measurement
type's "
Installation and
Alignment
of
Optics
"
section.
Both
Optics
must be at the
"
ncaf
end of
travel
"
and
already
adjusted around
the laser
beam.
2.
Move
the
Retroreflector
or
Reflector (depending
on
the type
of
measurement
you're
making
)
away from the Laser.
Stop
movement when
the
laser beam
is
about 10 move
off
the
Retroreflector's or
Reflector's
target
surface, or
when Ihe Oplics reach the
end of
travel.
3.
Now
make
a
se
ries
of adjustments
to the Laser Head untillhe beam returns to where
it
originally was on
the reflecting
Optic
or
ils larget. (This process is illustrated in
Figure
15-1.)
a.
Rolale (turn
)
The I.aser Head to move the beam back toward the
crosshairs or etched
line
on your
reflecting
Optic.
(See step "2"
in
Figure
15-1.
)
As
soon
as you
do this, the Laser beam
will
be
partially or
fully blocked by the
Interferometer's
target hole
.
b.
Translate the Laser Head
vertically
and horizontally unTil the beam
again
goes through
the hole
in
the
Interferometer's
largeT
(See
step
"3"
in Figure
15-1.
)
If the
Laser
beam
is
nOI
now hilling the correct point on
the
reflecting
Optic, perform
again
the process
of
turning
and
translating the Laser
Head,
4.
Continue
this process
of
moving the Reflecting Optic and then adjusting the Laser Head
as
many times
as
necessary until the
end of
travel
Is
reached. At
this
point, the
laser will
be
aligned to the table
and
to the
optics.
Summary
1.
Translate the laser Head
or
move the
optics
to initially
position
the
optics around
the laser
beam according
to
instructions given in each
measurement
section.
2.
After
movement
of one optic:
a.
Ro tate (tilt
or turn
)
the Laser Head
any
time the Laser's beam doesn 't hit the
Retrorefleclor's
target.
b.
Translate
the laser
Head
linearly
(up/
down
or
left
/ right)
any
time the
laser
beam doesn't
go
through the
Interferometer's
target
hole.
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