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5.14
Comparator-Based Systems
When checking a comparator-based system refer to Table 4-73. This is a typical comparator
program and will verify overall system operation. Once a system program is written and
loaded into the system controller, verify system operation by performing the following steps:
CAUTION
Prior to performing checkout of the comparator-based systems
disconnect the DAC inputs to the drive motors until the cor-
rect position of the NORMAL/REVERSE jumpers are estab-
lished in each axis. In addition, limit switches or stops should be
installed in each axis to prevent the stage from overdriving
its preset limits.
a.
Verify that the data light on the upper front edge of the 10746A Binary Interface card
lights when an instruction i s sent from the system controller to transfer data. Note that
this light is not lit when instructions (i-e., not data) are transferred from the system
controller to the coupler backplane via the 10746A card.
NOTE
If
the
polarity
of
the
DAC
outputs
in
the
following
step
i s
not
correct,
change
the
position
of
the
NORMAL/REVERSE
jumper
on
the
10762A
Comparator
card
or
change destination
via
software.
Refer
to
the
1076214
unit
manual
for
additional
information
if
required.
b.
Command the system to move the measurement optics a specific distance and verify
that the DAC response i s appropriate.
c.
Interrupt the laser beam in each axis and verify the system comes up with an error
indication. Reset the system after each error indication.
d.
Connect the DAC to the drive motors.
e.
Command the system to move the measurement optics a specific distance and verify
the movement i s correct.
f.
Replace the front panel of the 10740A Coupler.
5.15
ENCLISH/METRIC PULSE OUTPUT SYSTEMS CHECKOUT
The English/Metric Pulse Output System is primarily controlled by firmware programming on
the 10763A English/Metric Pulse Output card. Once the system is connected t o a system con-
troller and power is applied, the primary control consists of starting and stopping the system
and checking the output for errors (see Figure 5-72). To check out the system after it i s installed
perform the following checks:
NOTE
Disregard any of the following steps if the system controller
does not have the required capability.
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Table of Contents
Troubleshooting
