Thermal Dynamics A-08950, Руководство по обслуживанию

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CUTMASTER 12mm
Manual 0-5077 5-17 SERVICE
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 con-
nection of cable to clamp is secure.
B. Main arc transfers but current cannot be
adjusted
1. Defective Logic PCB 3
a) While main arc is transferred,measure volt-
age 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 1
a) Replace Main PCB 1
C. In LATCH mode, when the torch switch is
released the arc shuts OFF immediately.
1. Defective Logic PCB 3
a) Replace Logic PCB 3.
D. In RAPID AUTO RESTART mode, with
torch switch closed, the pilot does not
start immediately when the cutting arc
extinguishes
1. Defective Logic PCB 3
a) Replace Logic PCB 3
E. 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 4
a) Measure voltage on PCB 4 between J1-6 to J1-8
for 12VDC.
If 12VDC is present replace PCB 4
2. Defective Main PCB 1
a) Measure voltage on MAIN PCB between J1-6
to J1-8 for less than 2VDC.
If voltage is less than 2VDC, replace PCB 1
B. No OK-TO-MOVE signal while cutting.
1. Defective MAIN PCB 1
a) Measure voltage on PCB 4 between J1-1 to J1-3
for 12VDC while cutting.
If 12VDC is present, replace MAIN PCB 1
2. Defective Automation Interface PCB 4
a) Measure voltage on PCB 4 between J1-1 to J1-3
for less than 2VDC while cutting.
If voltage is less than 2VDC, replace PCB 4.
C. ARC VOLTS signals are low or not present
1. Defective Automation Interface PCB (PCB 4)
a) Replace PCB 4