Cebora PLASMA PROF 122 Instruction Manual page 13

fig. 6
2.1 GOUGING
This machine may be used for gouging, making it possible to
remove defective welds, separate welded pieces, prepare edges,
etc.
To do so, you must use the tip E (fig. 8), diam. 3 mm, and mount
the spacer C on the shield cup bushing D. The spacer C serves
to prevent melted metal from burning the insulation on the shield
compass supplied upon re-
quest. Remember that the com-
pass may make it necessary
to use the starting technique
described above.
NOTE: Avoid keeping the pilot
arc lit needlessly when not
using the device, to prevent
unnecessary wear on the elec-
trode, diffusor and tip.
When you have finished
working, turn off the
machine.
fig. 8
cup bushing D during gouging.
The current to be used ranges from 70 to 120/150 A, based on
the thickness and amount of material to be removed.
This must be done holding the torch at an angle (fig. 7) and
moving towards the melted material so that the compressed air
leaving the torch pushes it away. The angle of the torch with
respect to the workpiece depends on the penetration desired.
Since melted waste tends to stick to the spacer and tip during
this procedure, it is best to clean them frequently to prevent
certain phenomena (double arc) that can destroy the tip in just a
few seconds.
Given the high amount of radiation (infrared and ultraviolet)
emitted during this procedure, we recommend that the operator
be carefully protected, as well as anyone else near the work area.
When you have finished working, turn off the machine
2.2 USING THE TORCH P70 (UPON REQUEST)
The machine can also operate with the torch P70. When this
torch is mounted, the machine automatically sets itself to a
cutting current of max. 70 A, and settings are available starting
at 20 A.
The workpiece can be cut in contact, using either a standard tip and
electrode or a long tip and electrode, but only up to 50 A.The red
pilot light S will indicate when it is necessary to use the spacer.
NOTE: When using the torch P70, the electrical safety device
to block the unit when the electrode is worn could fail to
work.
Always turn the machine off after use.
3 CUTTING PROBLEMS
3.1 INSUFFICIENT PENETRATION
fig. 9
13