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4
Cutting operation
4.1 Safety measures prior to operation
4.1.1 Safety precautions for grounding the machine
The cable of this machine is equipped with a
grounding wire. For safety, be sure to ground
the wire as follows, in addition to checking the
connection of the power cable. (As shown in
diagram)
4.1.2 Selection of tip
Referring to the Cutting Data, Select the
suitable tip according to the plate thickness.
For a heavily rusted plate or for a bevel cutting
angle of more then 20°, select the tip one grade higher than the one shown in the cutting
Data.
4.1.3 Operation of quadruple switch
1. When machine needs to change direction, pull operating bar of quadruple switch in the off
position. When machine stops running, change the position to run.
２.Move machine when operating bar of quadruple switch is in the off position.
３.Before open power, pull operating bar of quadruple switch in the off position. If it is in
other position, machine runs when open power, which is dangerous
Notice: before open power, it is necessary to check whether drive knobs are in the off position.
If drive switch is in the on position, it is dangerous to run machine.
4.2 Ignition and flame adjustment
NOTE: Adjust the gas pressure according to the Cutting Data. The data shows the pressure
when all valves are open. Readjust the pressure after ignition.
1. Open the fuel gas valves 1/4 to 1/2 a turn, and light the torch with an igniter.
2. Then, open the preheating oxygen valve gradually until a white cone of the standard
flame gas been obtained. (The incandescent area should be uniform and about 5-6 mm
in length.)
3. Open the jet oxygen value fully. Readjust the flame if its condition has changed. A
disorderly flow of the jet oxygen will adversely affect the quality of the cutting surface. In
such a case, clean the tip with a suitable cleaning needle while the jet oxygen is flowing.
4. Appropriate distance between the tip end and cutting surface:
● Acetylence gas ...........8-10mm
● LPG gas .................5-8mm
- 11 -
CG1-2A H Beam cutter
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