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74
Appendix II: Troubleshooting
Fault Symptoms Fault Check
Fault Analysis
Recommended Solutions
Suddenly
breakdown in
normal operation
Always stop at the
same position in
every operation cycle
a. Machining program
at fault
b. CNC software at fault
Dispatch the software back to
the manufacturer for
professional troubleshooting.
The system still runs
but the cutting torch
stops abnormally
along all axes or one
axis.
a The travel motor is
locked.
b The travel motor fails.
Check if the machine is frozen
and level enough.
The system still runs
but the cutting torch
does not move along
one axis any more
and gives no
response to any
keystroke, especially
to the pause key.
The machine operation
is interrupted.
a. Remove the interference
and make sure the grounding
wire of plasma power supply is
connected to the machine.
b. Check if the motor(previous
model) has isolation board or
not.
c. If it is flame mode, check if
the solenoid valve for cutting
oxygen is given arc extinction.
Motor fails to run
Check the system
wiring.
Loose connection or
disconnection
Secure the connection.
Check the driver.
Check for any alarm
message or if the
setting is correct or not.
Change the setting of driver.
Check system
setting.
Check if the start speed
is zero or too high, the
speed regulation time is
too short and the
electronic gear or pulse
equivalency is
appropriate to be zero.
Suggest to record the original
parameters before making any
modification.