Thermal Dynamics Cutmaster 82, Руководство по обслуживанию

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cutmaster 82
Manual 0-4980 5-17 SERVICE
E. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED on, Fault Indicators
off, Pilot Arc is intermittent.
1. Defective Logic PCB
a) Measure for 12VDC on Main PCB between
test Point GND1 to J2-8. If 12VDC is present,
replace Logic PCB
2. Defective Main PCB
a) Replace Main PCB
F. INTERNAL ERROR FAULT INDICATOR AND
90 PSI INDICATOR FLASHING
1. There has been a microprocessor problem.
a) Turn ON/OFF SWITCH to OFF position and
then turn to ON position to clear the error
5.10 Main Arc and Controls
Problems
A. Main arc will not establish, LED D59 on
Main PCB remains on while pilot arc is
striking the work piece.
1. Work Cable not connected.
a) Connect cable to work piece
2. Work cable open / broken.
a) Check continuity of work cable. Insure connec-
tion of cable to clamp is secure.
B. Main arc transfers but current cannot be
adjusted
1. Defective Logic PCB
a) While main arc is transferred,measure voltage
on Main PCB between test points GND1 to
I_DMD1.
b) Adjust CURRENT CONTROL POTENTIOM-
ETER from maximum to minimum. Voltage
should vary from 4VDC at max to 1 VDC at
min
If voltage does not vary with CURRENT CONTROL
POTENTIOMETER, Replace Logic PCB
2. Defective Main PCB
a) Replace Main PCB
C. In LATCH mode, when the torch switch is
released the arc shuts off immediately.
1. Defective Logic PCB
a) Replace Logic PCB
D. With CURRENT CONTROL
POTENTIOMETER set at maximum, output
current is only 60 amps.
1. Tip is touching the work piece, Drag mode.
a) Lift tip off work piece
2. Defective Pilot IGBT on Main PCB
a) Check per section 4.10I
E. In RAPID AUTO RESTART mode, with
torch switch closed, the pilot does not
start immediately when the cutting arc
extinguishes
1. Defective Logic PCB
a) Replace Logic PCB
F. INTERNAL ERROR FAULT INDICATOR AND
90 PSI INDICATOR FLASHING
1. There has been a microprocessor problem.
a) Turn ON/OFF SWITCH to OFF position and
then turn to ON position to clear the error
5.11 CNC Interface Problems
A. Nothing happens when jumper is installed
between J2-3 to J2-4.
1. Defective Automation Interface PCB (PCB4)
a) Measure voltage on PCB4 between J1-6 to J1-8
for 12VDC.
If 12VDC is present replace PCB4
2. Defective Main PCB
a) Measure voltage on Main PCB between J1-6 to
J1-8 for less than 2VDC.
If voltage is less than 2VDC, replace PCB1
B. No OK-TO-MOVE signal while cutting.
1. Defective Main Pcb (PCB1)
a) Measure voltage on PCB4 between J1-1 to J1-3
for 12VDC while cutting.
If 12VDC is present, replace PCB1
2. Defective Automation Interface PCB (PCB4)
a) Measure voltage on PCB4 between J1-1 to J1-3
for less than 2VDC while cutting.
If voltage is less than 2VDC, replace PCB4.