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August 22, 2008
7-3
SERVICE MANUAL
FABRICATOR 251
7.04 Logic and Control Tests
A. Dep
r
ess Gun Switch and obse
r
ve the following:
1. Gas flows
2. Contacto
r
ene
r
gizes
3. Feed Roll Tu
r
ns
4. Display
r
eads app
r
ox "15.0 V"
B. Release Gun Switch
1. Gas flow stops
2. Contacto
r
de-ene
r
gizes
3. Feed Roll stops
4. Display
r
eads "00.0V"
C. Set WELD MODE SELECTOR SWITCH to position "4T".
Dep
r
ess Gun Switch and obse
r
ve the following:
1. Gas flows
2. Contacto
r
ene
r
gizes
3. Feed Roll Tu
r
ns
4. Display
r
eads app
r
ox "15.0 V"
D. Release GUN switch
1. Gas continues to flow
2 Contacto
r
r
emains ene
r
gized
3. Feed
r
oll continues to tu
r
n
4. Display
r
eads app
r
ox "15.0 V"
E. Dep
r
ess Gun Switch
1. Gas flow stops
2. Contacto
r
de-ene
r
gizes
3. Feed Roll stops
4. Display
r
eads app
r
ox "0.0 V"
F. Set WELD MODE SELECTOR SWITCH to position "2T".
Set BURNBACK CONTROL potentiomete
r
to maximum
position. Dep
r
ess Gun Switch and obse
r
ve the
following:
1. Gas flows
2. Contacto
r
ene
r
gizes
3. Feed
r
oll tu
r
ns
4. Display
r
eads app
r
ox "15.0 V"
G. Release Gun Switch
1. Feed Roll stops immediately
2. Display
r
eads "15.0 V"
2. Afte
r
1 ½ seconds
a. Gas flow stops
b. Contacto
r
de-ene
r
gizes
c. Display
r
eads "0.0 V"
H. Set BURNBACK CONTROL potentiomete
r
to minimum.
Set MODE SELECTOR SWITCH to SPOT position
1. Dep
r
ess Gun Switch
a. Gas Flows
b. Contacto
r
ene
r
gizes
c. Feed Roll tu
r
ns
d. Display
r
eads "15.0 V"
e. Afte
r
.5 seconds
1. Gas flow stops
2. Contacto
r
de-ene
r
gizes
3. Feed Roll stops
4. Display
r
eads "0.0 V"
I. Set WELD (SPOT/STITCH) TIMER CONTROL to
Maximum position (4)
1. Dep
r
ess Gun Switch
a. Gas flows
b. Contacto
r
ene
r
gizes
c. Feed
r
oll tu
r
ns
d. Display
r
eads "15.0 V"
e. Afte
r
12 seconds
1. Gas flow stops
2. Contacto
r
de-ene
r
gizes
3. D
r
ive
r
oll stops
4. Display
r
eads "0.0 V"
Summary of Contents for FABRICATOR 251
Page 2: ......
Page 22: ...FABRICATOR 251 SERVICE MANUAL 2 6 August 22 2008 NOTES ...
Page 38: ...3 16 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 54: ...4 16 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 80: ...8 4 August 22 2008 FABRICATOR 251 SERVICE MANUAL NOTES ...
Page 94: ...FABRICATOR 251 A 4 August 22 2008 APPENDIX 3 MAIN PCB CIRCUIT DIAGRAM 30 VAC Art A 08574 ...
Page 95: ...FABRICATOR 251 August 22 2008 A 5 DESCRIPTION FABRICATOR MAIN PCB 7977964 Art A 08574 _ ...
Page 96: ...FABRICATOR 251 A 6 August 22 2008 APPENDIX 4 SPOT TIMER CIRCUIT DIAGRAM Art A 08575 ...
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