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.
4)
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.
Repair and maintenance
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
connect , 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
；
Trouble shooting
Trouble shooting
Trouble
Reasons
Solutions
1. When the power is
switched on, the lamp
and the digital meter
are not ON.
1.Three-phase power misses phase
2.Supply power switch is damaged
3.Power control fuse 3A is broken
1.Check three-phase power source
2.Change power switch
3.Change power control fuse
2
．
Supply abnormal
indicator lamp is ON
without arc striking
1
．
Three-phase power misses phase
2. Three-phase power is overload under
voltage
Check three-phase power source to ensure
the supply voltage accords with the supply
requirements.