Model SH-2012AH-QG
Cutting Machine
（
C002
）
46
Appendix IV: Troubleshooting
Fault Symptoms
Fault Check
Fault Analysis
Recommended Solutions
Suddenly break
down in norma
l operation
Always stop at the same
position in every operatio
n cycle
a. Machining program at f
ault
b. CNC software at fault
Dispatch the software back to the man
ufacturer for professional troubleshooti
ng.
The system still runs but
the cutting torch stops ab
normally along all axes o
r one axis.
a The travel motor is lock
ed.
b The travel motor fails.
Check if the machine is frozen and le
vel enough.
The system still runs but
the cutting torch does not
move along one axis an
y more and gives no resp
onse to any keystroke, es
pecially to the pause key.
The machine operation is i
nterrupted.
a. Remove the interference and make
sure the grounding wire of plasma po
wer supply is connected to the machin
e.
b. Check if the motor(previous model)
has isolation board or not.
c. If it is flame mode, check if the so
lenoid valve for cutting oxygen is giv
en arc extinction.
Motor fails to
run
Check the system wiring. Loose connection or disco
nnection
Secure the connection.
Check the driver.
Check for any alarm mess
age or if the setting is cor
rect or not.
Change the setting of driver.
Check system setting.
Check if the start speed is
zero or too high, the spe
ed regulation time is too s
hort and the electronic gea
r or pulse equivalency is
appropriate to be zero.
Suggest to record the original paramet
ers before making any modification.
Check for axle problem a
nd if the same model of
motor is available.
Replace parts one by one
to isolate the real cause to
the problem.
Replace the broken part.
Slow system re
sponse
Check the power supply. Check if the output voltag
e of power supply is withi
n the allowable range.
Adjust the output voltage or replace th
e power supply for switch.
Check the system paramet
ers for any error.
Suggest to record the original paramet
ers before making any modification.
Travel limit ala
rm at power-on
Check if any external lim
it switch is connected.
Check if limit switches ar
e functional and if loose c
onnection or disconnection
exists.
Secure the connection.
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