11. Cutting technology instruction
over-heated, while the cutting speed is fast, the drag is enlarged, this
is not beneficial for eliminating burr.
• So under certain circumstance, there exists a proper
selection range for air flux and cutting speed.
• Diminish the cutting surface slanting and rounding problem
The incision surface is a little slant and the upper side is a little
round during cutting with air plasma. Though the slanting range is
acceptable during the cutting process, in order to improve the cutting
quality, people begins to pay attention to this problem. Usually slowing
down the cutting speed properly can avoid the slanting, but this may
enlarge the effect zone and incision width, as well as decrease the
production capacity, so this measurement is not wildly used. Recently,
people can avoid the slanting by improving the nozzle structure, this is
called super cutting method. By adopting multi-hole nozzle during the
cutting process, the air current from the small hole is parallel with that
from the main hole, this can avoid the dispersing of the plasma flame
on metal top, and then a parallel incision, square upper side and no
metal slag seam on the lower side is obtained.
instruction manual.
5) Check if the cutting ground wire is well connected;
6) Check if the water in compressed air filter fixed at the
back of machine is drained regularly.
7) Check if the gas pressure indicator lamp on the panel is
ON. If it is not ON, check if compressed gas pipe is well connected ,
and if the gas pressure is normal. When the gas pressure is less than
0.3Mpa, the lamp is not ON.
8) When the water cooling torch is applied, check if the water
pressure indicator lamp on panel is ON. If it is not ON, check if the
cooling water current is normal.
9) Check if the overheat indicator lamp on panel is ON. If yes,
check if the temperature relay on the radiator is damaged or not.
10) Open the machine top to check if the lead-typed fuse next
to the control transformer has been fused.
Ordinary trouble and repair as following diagram
12
Troubleshooting & Repair
1. If there is trouble caused by high voltage in the machine, a
professional electrician or serviceman of our company is required to
repair it.
2. Please check following first when there is trouble.
1) The three-phase power should be 380±40VAC, check if
it misses phase or voltage fluctuation exceeds its required range of
power supply.
2) Check if the supply abnormity indicator lamp is ON. If
it is ON, check if the three-phase power switch of distribution box
is damaged, and if the fuse and the machine power wire are well
equipped. Otherwise it will cause phase missing or bad contact,
which makes the machine work abnormally.
3) Check if the torch switch and its wire are damaged or
short-circuit, and if the nozzle and electrode are damaged.
4) If the control plug is connected mistakenly after user
exchanging a different torch from another manufacturer, please
proceed the checking as per “torch connection” mentioned in
1. Three-phase power
misses phase
2. Supply power switch is
damaged
3. Power control fuse 3A is
broken
1. The ambient temperature
is too high
2. When cutting, cooling fan
rotates slowly or do not rotate,
so the cooling effect is weak
3. Temperature relay is damaged
1. When the power is
switched on, the lamp and
the digital meter are not ON
3. No arc striking or arc
breaking during cutting.
Overheat indicator lamp
is ON
1. Check three-phase power
source
2. Change power switch
3. Change power control
fuse
1. Let the cutter rest for a
while, and will come to work
normally later.
2. Check fan power source
or change cooling fan
3. Change temperature relay
2. Supply abnormity indicator
lamp is ON without arc
striking
4. It cannot start. Gas
pressure lamp is not ON
Trouble
Check three-phase power
source to ensure the supply
voltage accords with the
supply requirements
1. Connect the gas source
2. Adjust gas supply
pressure
3. Change LGK AP1
Solutions
1. Three-phase power misses
phase
2. Three-phase power is
overload under voltage
1. No gas pressure
2. The gas supply pressure
is too low
3. LGK AP1 is damaged
Reasons