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12 Maintenance (continue)
12.1.2 Cables
Table 2
Position
Check point
Remarks
Output side
Base metal
side
Cable
·
Cable insulation: If cable coating is worn or damaged.
·
Cable connection area: If any current-carrying parts are
exposed (insulation is damaged) or loose connection.
If any heavy items not placed on the cable.
To secure the physical safety and
Stable arc, check those cables in an
Appropriate manner according to the
Conditions of shop floors.
○
Daily check: Quick and rough
check
○
Period check: Thorough check
Input side
Cable
·
Secondary side switches in distribution box: If there is
any loose connection.
·
Input side cable: If cable coating is worn or damaged.
If any heavy items not placed on the cable.
·
Input terminal of cutting machine: If there is any loose
connection. Outer cover is installed firmly.
Grounding
wire
·
ground connection for cutting machine and grounding
wire for base metal ground connection:
If each grounding wire is connected all right and fastened
securely.
To prevent a physical accident
caused by electric leakage, make
sure to execute routine inspection.
12.1.3 The cutting torch
Please
·
During replacing cutting tip or electrode, please
use accessory cutting tip clamp of the cutting
torch to fasten firmly.
·
When you use pliers or wrench and use too
much strength, the cutting torch may be damaged.
(Screw thread is damaged. The centre between
cutting tip
～
electrode runs off.
●
The replacement of parts at front end
Please classify according to the purpose of use
·
Long cutting tip, long electrode:
Cutting for angle form, concave work piece (base
metal)
·
Short cutting tip, short electrode: thin plate
cutting
Note:
Use the combination of long cutting tip and short
electrode, no arc can be generated.
●
Replacement time for cutting tip and
electrode
For below mentioned circumstances, please
replace cutting tip and electrode.
· cutting groove face inclining is large.
· Arc ignition is difficult.
· A serious discoloration around the cutting area
happens.
· Cutting arc break.
· Cutting speed slow down rapidly.
· cutting tip is molten into base metal.
· cutting tip hole has been deformed
·Make electrode short over 1.2mm.
WARNING
Before replacing the cutting torch parts,
please be sure to turn off the power
switch. Otherwise, during confirmation, if
the cutting torch switch is pressed, air can
blow from cutting tip end and high voltage
can be generated, causing the hazards of
fatal electric shock and being burnt.
WARNING
After cutting, the temperature of the cutting
tip and electrode are high. During replacing,
please prevent burnt.
