LGK-100.160.200IGBT OPERATOR’S MANUAL
20
the air blow force, and beneficial for eliminating burr.
¾
Adjust suitable air flux and cutting speed. If the air flux is too small, the blow force is
not enough, while if too big, the plasma arc will be shorten, the incision will be “V” shape,
the drag enlarge. The burr can be formed under both conditions. When cutting speed is too
slow, the incision is large and rough, the bottom is easy to be over-heated, while the
cutting speed is fast, the drag is enlarged, this is not beneficial for eliminating burr.
¾
So under certain circumstance, there exists a proper selection range for air flux and cutting
speed.
z
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.
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
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.
Summary of Contents for LGK-100GBT
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