Cebora PROF162 Manual De Instrucciones página 10

on the pressure gauge G matches the values shown on
the control panel; if not, adjust using the knob H of the
pressure regulator, then lock the knob by pressing it
downward.
Connect the grounding cable clamp to the workpiece,
making sure that the clamp and workpiece have a good
electrical contact, especially when using painted, oxi-
dized, or insulated metal.
Do not connect the clamp to the part of the material that
must be removed.
Use the knob Z to select the cutting current based on the
thickness to be cut, following the guidelines below:
Aluminum:
8 ÷ 10 mm
15 ÷ 18 mm
22 ÷ 25 mm
Soft and stainless steel:
up to 5 mm
up to 20 mm
up to 30 mm
up to 40 mm
The machine is equipped with constant cutting current
regulation, thus the user may seek out the correct value
based on the cutting conditions.
Current values higher than those indicated will not jeop-
ardize smooth operation of the machine or torch, and at
times may improve the cutting quality because they
reduce dross along the edges of the workpiece.
With cutting currents from 20 to 50A and a ø 1 or 1.1 mm
nozzle, you may rest the nozzle directly on the material to
be cut.
In other conditions, you must use a dual-tip or spring
spacer to avoid placing the nozzle in direct contact with
the workpiece.
With a torch to be used in automatic mode, maintain a
distance of approximately 4/5 mm between the nozzle
and the workpiece.
Press the torch trigger to light the pilot arc.
If cutting does not begin after 2 seconds, the pilot arc will
go out; press the trigger again to re-light it.
Hold the torch upright while cutting.
Once cutting is complete and you have released the trig-
ger, air will continue to escape from the torch to cool it.
It is recommended not to shut the machine off until this
process is completed.
When cutting holes or beginning a cut in the center of the
workpiece, you must hold the torch at an angle and
straighten it slowly, so that molten metal is not sprayed
fig. 4
10
3 ÷ 4 mm 40 ÷ 50A
80 ÷ 90A
110 ÷ 120A
160A
40 ÷ 50A
80 ÷ 90A
110 ÷ 120A
160A
onto the nozzle (see fig.4).
This should be carried out
when cutting holes in work-
pieces more than 3 mm thick.
When working in automatic
mode (see fig. 5), keep the
nozzle 10-11 mm from the
piece; if possible, move it to
approximately 4-5 mm after
making the hole. Do not cut
holes in pieces more than 10-
12 mm thick. For greater thick-
nesses, the material must be
perforated before cutting.
When making large, circular
cuts, we recommend using
the special compass sup-
plied upon request. It is
important to remember that
you must follow the starting
technique described above
when using the compass.
Do not keep the pilot arc lit in
the air unnecessarily, to
avoid unnecessary
sumption of the electrode,
diffuser and nozzle.
Shut off the machine when
you have finished working.
4.2 GOUGING
fig. 6
This operation allows you to remove defective welds,
separate welded parts, prepare edges, etc.
To proceed, you must use the ø 3 mm nozzle.
The current value to be used ranges from 70 to 110A,
based on the thickness and amount of material to be
removed.
It must be carried out by holding the torch at an angle
(fig.6), and moving towards the molten material so that
the gas escaping from the torch pushes it away.
The torch angle in relation to the workpiece depends on
the desired level of penetration. Since the molten dross
produced by this procedure tends to stick to the gas noz-
zle holder and nozzle, clean them frequently to avoid
problems (dual arc) that can destroy the nozzle in the
space of a few seconds.
Considering the high level of radiation (infrared and ultra-
violet) emitted during this procedure, we recommend that
the operator and anyone else in the vicinity of the work-
place follow adequate, careful protective measures.
Shut off the machine when you have finished working.
5 CUTTING ERRORS
5.1 INSUFFICIENT PENETRATION
This problem may be caused by:
• high speed:
fig. 5
con-