FABRICATOR 281
ADVANCED TROUBLESHOOTING
-4
Manual No. 0-4880B
J. Set MODE SELECTOR SWITCH to STITCH position.
Set WELD (SPOT/STITCH) TIMER CONTROL to
minimum.
1. Depress Gun Switch
a. Gas Flows
b. Contactor energizes
c. Feed Roll begins a cycle of turning for .5
seconds then stop turning for .5 seconds
d. Display reads "15.0 V"
2. Released Gun Switch
a. Gas flow stops
b. Contactor de-energizes
c. Feed Roll stops
d. After 5 seconds,
display reads "0.0 V"
K. Set WELD (SPOT/STITCH) TIMER CONTROL to
Maximum position "4" . Set DWELL (STITCH) TIMER
CONTROL to Maximum Position "4"
1. Depress Gun Switch
a. Gas flows
b. Contactor energizes
c. Feed roll begins a cycle of turning for 12
seconds then stop turning for 12 seconds
d. Display reads "15.0 V"
2. Release Gun Switch
a. Gas flow stops
b. Contactor de-energizes
c. Feed Roll Stops
3. After 5 seconds,
display reads "0.0 V"
L. Set COARSE VOLTAGE SELECTOR SWITCH to
position "H". Set FINE VOLTAGE SELECTOR SWITCH
to position "8".
M. Connect voltmeter probes to JB-6 (-) and J6-8 (+).
Depress the gun trigger and vary the WIRE SPEED
CONTROL potentiometer from minimum to maxi-
mum. The voltage should vary from approx 4VDC
up to approx 27 VDC.
N. Set WIRE SPEED CONTROL to "4"
O. Set COARSE VOLTAGE SELECTOR SWITCH to
position "L".
P. Set FINE VOLTAGE SELECTOR SWITCH to position
"1".
This completes the Logic & Control Tests. If the
above are all correct then proceed to paragraph 'C'.
If the above does not function as noted then note the
symptom and proceed to Section 7.09 Logic & Control
Problems.
7.05 Spool Gun Control (J1) Test
A. Connect inlet gas supply hose to spool gun gas inlet
Jumper J1 terminals D & G
1. Gas Flows from Spool Gun gas outlet port on
the front panel
2. Contactor W1 Closes
3. Feed Roll does not turn
B. Check voltages at the following points:
J11 PINS
From Pin H to JB-5 on MAIN PCB
1VDC
From Pin E to JB-5
4.5VDC
From Pin C to Pin B
14VDC*
(*Because there is no load from a motor this
voltage will slowly drop)
C. Disconnect jumper from J1. Reconnect gas hose to
Mig Gun Gas inlet.
Содержание 281 FABRICATOR
Страница 54: ...fabricator 281 OPERATION 4 18 Manual No 0 4880B NOTES ...
Страница 80: ...Fabricator 281 CIRCUIT OPERATION 8 Manual No 0 4880B ...
Страница 96: ...fabricator 281 APPENDIX A Manual No 0 4880B 30 VAC Art A 07520 APPENDIX 3 MAIN PCB CIRCUIT DIAGRAM ...
Страница 98: ...fabricator 281 APPENDIX A Manual No 0 4880B APPENDIX 4 SPOT TIMER CIRCUIT DIAGRAM Art A 07521 ...
Страница 104: ...fabricator 281 APPENDIX A 12 Manual No 0 4880B ...
Страница 105: ......