FABRICATOR 281
Manual No. 0-4880B
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ADVANCED TROUBLESHOOTING
7.04 Logic and Control Tests
A. Depress Gun Switch and observe the following:
1. Gas flows
2. Contactor energizes
3. Feed Roll Turns
4. Display reads approx "15.0 V"
B. Release Gun Switch
1. Gas flow stops
2. Contactor de-energizes
3. Feed Roll stops
4. Display reads "00.0V"
C. Set WELD MODE SELECTOR SWITCH to position
"4T". Depress Gun Switch and observe the following:
1. Gas flows
2. Contactor energizes
3. Feed Roll Turns
4. Display reads approx "15.0 V"
D. Release GUN switch
1. Gas continues to flow
2 Contactor remains energized
3. Feed roll continues to turn
4. Display reads approx "15.0 V"
E. Depress Gun Switch
1. Gas flow stops
2. Contactor de-energizes
3. Feed Roll stops
4. Display reads approx "0.0 V"
F. Set WELD MODE SELECTOR SWITCH to position
"2T". Set BURNBACK CONTROL potentiometer
to maximum position. Depress Gun Switch and
observe the following:
1. Gas flows
2. Contactor energizes
3. Feed roll turns
4. Display reads approx "15.0 V"
G. Release Gun Switch
1. Feed Roll stops immediately
2. Display reads "15.0 V"
3. After 1 ½ seconds
a. Gas flow stops
b. Contactor de-energizes
4. After 5 seconds, display reads "0.0 V"
H. Set BURNBACK CONTROL potentiometer to
minimum. Set MODE SELECTOR SWITCH to SPOT
position
1. Depress Gun Switch
a. Gas Flows
b. Contactor energizes
c. Feed Roll turns
d. Display reads "15.0 V"
2. After .5 seconds
a. Gas flow stops
b. Contactor de-energizes
c. Feed Roll stops
3. After 5 more seconds, display reads "0.0 V"
I. Set WELD (SPOT/STITCH) TIMER CONTROL to
Maximum position (4)
1. Depress Gun Switch
a. Gas flows
b. Contactor energizes
c. Feed roll turns
d. Display reads "15.0 V"
2. After 10 seconds
a. Gas flow stops
b. Contactor de-energizes
c. Drive roll stops
3. After 5 more seconds, display reads "0.0 V"
Содержание 281 FABRICATOR
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Страница 98: ...fabricator 281 APPENDIX A Manual No 0 4880B APPENDIX 4 SPOT TIMER CIRCUIT DIAGRAM Art A 07521 ...
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