Table of Contents
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Table
6-4.
English/Metric
Pulse
Output
Electronics
System
Troubleshooting
(Cont'd)
DATA
ERRORS
(Confd)
reading,
error
is
less
than
one
part
in
100,000
and
is
evident
on
all
I
measurement
axes.
a
shorter
distance
than
a
known
dis-
I
placement
of
the
Small
error
one
measurement
axis
(Error
i s
less
than
one
part
in
100,000.)
CAUSE
ACTION
Compensation
1.
Check
output
of
circuitry
mal-
compensation
I
function
Misalignment
of
the
optics
resulting
in
cosine
error.
I
circuitry
by
per-
forming
Test
b.
2.
If
compensation
number
correct,
check
for
cosine
error
in
optical
alignment
(refer
to
Section
11).
3.
If
Comp.
number
incorrect,
replace
10755.
If
using
5510,
check
BCD
inputs
to
10755
using
logic
probe
and
verify
correct
Comp.
number
is
being
input.
4.
See
Section
I 1
for
optical
alignment
pro-
cedure.
1 .
10763A
mal-
See
Test
a
function.
2.
10760A
mal-
Troubleshoot
or
re-
function.
place
10760A.
3.
Cosine
error
Align
optics
(See
in
optical
align-
Section
11)
ment
(If
laser
reads
shorter
than
known
dis-
placement.)
4.
10780A
Satura-
Adjust
10780A
tion
(Refer
to
10780A
Manual.)
ERROR
DETECTION
I
4.
If
an
error
indication
does
not
occur
when
the
laser
beam
is
interrupted
in
a
measurement
axis:
a) Check LED indicator on associated 10780A receiver. If it extinguishes when beam is interrupted,
proceed to step b. If it remains on when beam i s interrupted,
1. Monitor 10780A test point on back of receiver. If voltage is greater than 1.1V dc, refer to
10780A manual to reduce receiver gain.
2. If voltage is in limits, check for incorrect rotation of optics or receiver (refer to Section 11).
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Table of Contents
Troubleshooting
