Valley FABRICATOR 251, Руководство по обслуживанию

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7-4 August 22, 2008
FABRICATOR 251 SERVICE MANUAL
J. Set MODE SELECTOR SWITCH to STITCH position.
Set WELD (SPOT/STITCH) TIMER CONTROL to
minimum.
1. Dep r ess Gun Switch
a. Gas Flows
b. Contacto r ene r gizes
c. Feed Roll begins a cycle of tu r ning fo r .5
seconds then stop tu r ning fo r .5 seconds
d. Display r eads "15.0 V"
2. Released Gun Switch
a. Gas flow stops
b. Contacto r de-ene r gizes
c. Feed Roll stops
d. Display r eads "0.0 V"
K. Set WELD (SPOT/STITCH) TIMER CONTROL to
Maximum position "4" . Set DWELL (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 begins a cycle of tu r ning fo r 12
seconds then stop tu r ning fo r 12 seconds
d. Display r eads "15.0 V"
2. Release Gun Switch
a. Gas flow stops
b. Contacto r de-ene r gizes
c. Feed Roll Stops
d. Display r eads "0.0 V"
L. Connect voltmete r p r obes to JB-6 (-) and J6-8 (+).
Dep r ess the gun t r igge r and va r y the WIRE SPEED
CONTROL potentiomete r f r om minimum to maximum.
The voltage should va r y f r om app r ox 4VDC up to
app r ox 27 VDC.
M. Set COARSE VOLTAGE SELECTOR SWITCH to
position "H". Set FINE VOLTAGE SELECTOR SWITCH
to position "8".
N. Connect voltmete r p r obes to JB-6 (-) and J6-8 (+).
Dep r ess the gun t r igge r and va r y the WIRE SPEED
CONTROL potentiomete r f r om minimum to maximum.
The voltage should va r y f r om app r ox 2VDC up to
app r ox 25 VAC.
O. Set WIRE SPEED CONTROL to "4"
P. Set COARSE VOLTAGE SELECTOR SWITCH to
position "L".
Q. Set FINE VOLTAGE SELECTOR SWITCH to position "1".
This completes the Logic & Cont r ol Tests. If the above
a r e all co rr ect then p r oceed to pa r ag r aph 'C'. If the above
does not function as noted then note the symptom and
p
r oceed to Section 7.09 Logic & Cont r ol P r oblems.
7.05 Spool Gun Control (J1) Test
A. Set MIG GUN / SPOOL GUN SELECTOR SWITCH to
SPOOL GUN position.
B. Connect inlet gas supply hose to spool gun gas inlet
Jumpe r J1 te r minals D & G
1. Gas Flows f r om Spool Gun gas outlet po r t on the
f r ont panel
2. Contacto r W1 Closes
3. Feed Roll does not tu r n
C. Check voltages at the following points:
J11 PINS
F r om Pin H to JB-5 on MAIN PCB 1VDC
F r om Pin E to JB-5 4.5VDC
F r om Pin C to Pin B 14VDC*
(*Because the r e is no load f r om a moto r this
voltage will slowly d r op)