Model
5526A
S
tr
aightn
ess
Mea
surements tAlong A
Horizontal
A)(i
s)
10-16
5. AI the near end of travel, move
Ihe
Interferometer
or
the Re
fl
ector in a direction p
ara
ll
el with
the slo
ll
ed
ope
ning in the Rertedor
until
the Measurement Di
sp
la
y reads zero.
tf beam strength again
gets
too
low
,
turn
the
la
ser
H
ead
10 regain adequate beam s
tr
ength,
and
translate the
la
se
r H
ead
to prevent
clipping
of the beam by the Interferometer.
6.
Repeat step " 1" through step
"5"
as
often as nec
ess
ary
to make
mea
surements
at
both
ends
of
travel come
out
to be " zero".
Meas
urem
en
ts
Al
ong A Perpendicular Axis
Perpendicular straightness measurements made on other horizontal
a)(e
s should be made from a
second
la
se
r H
ea
d
se
t·
up
in line with
thc
new
all'is.
Straightness measurements on
ve
rt
ica
l perpendicular
axes
are
des
cribed
In
Ihe n
ex
t seoion.
Fi
g
ure
1()"9
and Figure
70-
70 s
how
positioning
of
Strillghtness
Opti
cs
on three different
all'cs.
Two
l
ase
r Head
se
t·u
ps
are needed.
Oth
er
Mountin
g Requirements
Although
we
ha
ve tried
to
provide
you
wilh
a maximum
of
mounting
fle)(ibi1ilY, there
may
be
situations w hen you need
more
capab
ilit
y.
For more information,
yo
u should turn
to
Appendix
C
for
dimensions
of
the
Opti
cs
and the
mounting
hardware.
It may
so
metime
s be
impo
ssi
ble
f
or
yo
u to
po
sition the
Int
erferometer between the
la
se
r H
ea
d
and the Straig
htn
ess
Re
flector w
hil
e
at
the same time
mounting
the Interferometer where Ihe
too
l mounts and the Reflector
where
the
workpiece
mount
s.
In th
ese
cases
, you s
hould
use
the
Straig
htn
ess
R
~
l
ro
re
fl
ec
t
or
(
pro
vided in the Straightness Acc
es
so
ry
Ki
t)
to
make your measure·
menl
. (
See
Sec
ti
on
11
.)
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