21
Sheet 4
：
Indicator lamp status
Notes: there is no water pressure indicator on LGK-120HD, and the water pressure
indicator will be OFF when gas-cooled torch is equipped on LGK-200/300/400HD
cutter.
7)
Keep the torch nozzle 2mm~ 5mm away from work-piece. The axis line of nozzle
should be perpendicular to work-piece, and starts cutting from the edge of
work-piece. When the plate thickness is ≤12mm, the piercing can be done wherever
on the work-piece, and start the cutting. The cutting torch should be inclined to one
side a little during piercing on work-piece, so that the molten metal can be blown
away easily. Piercing is not recommended, because it damages nozzle easily, it is
better to drill a hole in arc striking point first, then strikes arc on the edge of the hole.
Press down torch switch, compressed gas sprays out from nozzle, and cutting
indicating lamp is ON. After gas pre-flows for 1 second (The default gas pre-flow
time of LGK-200/300/400HD is 1 second, LGK-120HD is 0.5 second) , high frequency
is generated, arc is stroke, and cutting begins by moving torch;
8)
When the control switch of operation method on front panel is at “Torch Unlock”,
press the torch switch and the cutting starts after arc striking. After loosening the
switch, there is no voltage output, and cutting stops, and compressed gas stops
supplying after 10 seconds. When it is at “Torch Lock”, press down the switch and
loosen it, and cutting starts after arc striking automatically. Press the switch again or
press it till the arc is off, then there is no voltage output, cutting stops, and
compressed gas stops supplying after10 seconds.
7
Operation and setting
7.1
Power on self test
After power on, the cutting machine self testing steps as below, need 7 seconds:
① Test the LED status, firstly all the LED will be on, then all off, and the normally
display;
② Make one self test of gas and display the air pressure value;
③ The last memory status is recalled and displayed on the panel, then turn to standby
mode;
Note: a intelligent cooling fan is used on the cutting machine, the cooling fan works
when cutting, the cooling fan stops after stopping cutting 8 munities.
7.2
The air pressure adjust and display
