7
CUTTING WITH PROLONGED ITEMS
This technique is used to cut in poorly accessible positions such
as angles, hollows, channels, etc.
Consumables are used at a higher rate with this technique.
CUTTING OPEN GRID OR PERFORATED PLATES
It is possible to cut open grid or perforated plates, by setting a
cutting current greater than 15A (from 15A to 30A).
When the torch button is pushed, if the operator goes out of
the workpiece during cutting, the pilot arc ignites again auto-
matically, to allow cutting to continue. Cutting done in open grid
mode gives rise to more wear of consumables.
IMPORTANT:
Precautions to be taken to cut correctly and ef
ficaciously:
•
Always cut moving the torch gently to achieve a stable, pre
cise cut.
•
Always cut moving the torch towards you which is simpler
than cutting while pushing or moving away from yourself.
•
Do not press or apply pressure to the torch during cutting
operations.
•
Always use a line of reference for straight cuts.
•
To execute circular cuts, we recommend application of the
specific compass (supplied upon request).
- 8 -
Completion of cutting operations. The compressor continues
to functions for some 30 seconds to consent the torch compo-
nents to cool after the arc is extinguished (“post flow” function).
The useful life of consumables is prolonged in this manner. Wait
for the air flow to cease before powering off the plant. During
this phase you may start a new cutting cycle: press the button
to restart the pilot arc.
- 9 -
Turn the power supply switch (Pos. 4, Fig. B) to position “O”,
thereby switching off the plant.
- 10 -
When the operator switches the machine off, by pushing the
power supply switch (Pos. 4, Fig. B):
• White power supply on LED (Pos. 2, Fig. C) stays lit.
• Yellow thermostat indication LED (Pos. 3, Fig. C) stays lit.
• During this period the microprocessor checks correct func-
tioning of all the components.
• Once this checking operation has been completed (duration
approx 5 sec.) the plant switches off.
FIG. G
FIG. F
FIG. E
Summary of Contents for SHARK 35
Page 15: ......
