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6.13
10761A
BINARY
MULTIPLIER TROUBLESHOOTING.
The
10761A
accepts
data,
via
the
10740A
Coupler
backplane
bus,
from several
sources:
10760A
Counter
cards,
10755A
Com-
pensation
Interface,
and i n
some
applications,
from
an
external
controller
via
the
10746A
Binary
Interface.
The
purpose
of
this
module
i s to
perform
the
multiplication
of
measurement
data,
velocity-of-light
compensation
factor,
and
possibly externally
entered
factors
a s
the
application
requires.
If
these
arithmetic
operations
are
not
properly
performed,
the
binary
multiplier
card
is
probably
the source
of
trouble.
If
all
axis
exhibit
a
problem, this
card
is
the
likely
source
of
trouble.
6.14
10762A COMPARATOR
TROUBLESHOOTING.
The
10762A
card
accepts
a
measured
position
signal
and
a
destination
signal
(both
in
binary)
and
supplies
a
correction
signal
in
binary
to
a
system
controller.
The
correction
data
is
the
digital
difference
between
the
two
inputs.
One
107624
card
is
used
for
each
axis
of
machine
movement.
Consequently,
after
checking
the
three
LED
indicators
for
an
indication
of
trouble,
cards
can
be
swapped
to
verify
a
problem.
(Remember
to
change
the
address
jumper
and
any
other
jumpers
that
may
be set
differently.)
The
three
LLY
indicators show
the
presence
of
+5-volt
power,
that
a
null
situation
exists
(destination
data
and
system
location
data
are
equal),
and
zero
speed
(system
not
moving).
For
additional
information,
refer
to
the
separate
unit
manual.
6.15
10763A
ENGLISH/METRIC
PULSE
OUTPUT
TROUBLESHOOTING.
The
10763A
con-
trols
the
other
cards
in
the
10740A
Coupler.
I t
does
this
by
issuing backplane
instructions
in
a
sequence
that
is
controlled by
a
on
the
10763A
card.
These
instructions
cause
10760A
Counter
cards
and
the
10755A
Compensation
Interface
to
output
data
to
a
10761A
Binary
Multi-
plier
card.
Subsequent
instructions
cause
the
multiplier
card
to
output
modified
measurement
data
to
the
10763A
card.
This
data
is
outputted
by
the
10763A
card
a s
up/down
or
A-quad-B
signals
to
external
equipment.
Troubles
can
be
isolated
by first
checking
the
LED
indicators
on
the
card
for
a
malfunction
indication
and
then
exchanging
the
suspect
card
with
another
system card.
The
10763A
card
has
LED
indicators
to
show
the
presence
of
+5-volt
power;
to
indicate
which
10763A
card
i s
in
control
of
the
system
at
a
given
time
(during normal
multiaxis
system
operation
the
control
.
--.
on
all
10763A
cards
appear
dimly
lit);
and
to
indicate
any
of
four
possible
system
errors.
I,clcl
to
the
separate
unit
manual
for
additional
information.
6.16
10764B
FAST
PULSE
CONVERTER.
The
fast
pulse
converter
is
designed
to
accept
a
reference
signal
from
the
5501A
Laser
Head
and
a
measurement
signal
from
one
or
two
10780A
Receivers.
The
fast
pulse
converter
then
outputs
up
and
down
pulses
that
represent
the
dif-
ference
in
frequency
between
the
reference
signal
and
the
measurement
signal(s).
Resolution
extension
factors
of
1
through
15
are
switch
selectable
for
the
10764B.
The
number
of
output
pulses
for
a
given
physical
displacement
of
the
optical
devices
will
be
increased
by
the
extension
factor
selected.
The
up
and
down
pulses
from
the
card
are
applied
to
counting
circuits
(usually
the
10762A
Comparator).
After
verifying
that
the
proper
reference
and
measurement
signals
(approximately
2MHz,
differ-
ential)
are
available
at
the
circuit
inputs,
you
can
assume
a
malfunction
of
the
10764B
if
it
fails
to
perform
any
of
its
normal
operating
functions.
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Table of Contents
Troubleshooting
