While Job 100 runs the second time in Automatic mode
and manipulator performs welding operations for Pro-
grams 100 and 200, finished parts for Programs 300,
400, and 500 from first run of Job 100 are unloaded
and new parts are loaded in side 000 fixtures.
Each additional run of Job 100 rotates mounting plate
and runs weld programs that match parts located at
weld side of turntable while finished parts are unloaded
and
new
parts
loaded
in
fixtures
at
parts
loading/unloading side.
3
-
5. SETTING RELAY TIME FOR
VALVE (Figure 3-4)
HIGH-SPEED
Figure 3
-
4. Adjustable Time-Delay Relay
An adjustable time-delay relay, located inside the turn-
table control panel, provides a time range of 0.1 to 1 .0
second in 0.05 second increments for energizing the
high-speed valve. The relay contacts are closed at the
beginning of each mounting plate rotation which opens
the high-speed valve to increase mounting plate
rotating speed. The contacts open when the relay times
RELAY
TIME
1.0 sec.
out which closes the high speed valve and the low-
speed rotation control decreases mounting plate final
rotating speed.
To adjust relay time, proceed as follows:
WARNING:
ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Shut down turntable, welding power source, and
robot control,
and disconnect input power
employing “lockout/tagging procedures” before
setting relay time.
Lockout/tagging procedures consist of removing plug
from receptacle, padlocking line disconnect switch in
open position, removing fuses from fuse box, or shut-
ting off and red-tagging circuit breaker or other discon-
necting device.
1. Open hinged front cover on control panel.
IMPORTANT:
Setting relay time depends on the
Ret TD-120 289
amount of mounting plate load weight. The chart in
Figure 3-5 is a guide for setting an appropriate relay
time for a given load weight. A specific setting for relay
time to provide the most efficient operation may vary
from the chart due to location and distribution ofweight
on the mounting plate.
2. Locate time-delay relay in upper left corner inside
control panel, and rotate adjustment knob to
desired time selection.
3. Close and secure front cover.
——
0 lbs.
100 lbs.
200 lbs.
300 lbs.
400 lbs.
500 Ibm.
600 lbs.
700 lbs.
800 ibm.
(0 kg)
(45 kg)
(91 kg)
1136 kg)
(¶81 kg)
(227 kg)
(272 kg)
(318 kg)
(363 kg)
900 lbs.
1000 lbs.
(408 kg)
(454 kg)
Figure 3
-
5.
LOAD WEIGHT
Load Weight And Relay
Time
Chart
Turntable control
Panel
0.9 sec.
0.8 sec.
0.7 sec.
0.6
sec.
0.5 sec.
0.4 sec.
0.3 sec.
0.2 sec.
0.1 sec.
0.0 sec.
OM-83O Page 11
