Cutting Speed - Lincoln Electric Tomahawk 1025 Bedienungsanleitung

A clean, dry primary gas (air or nitrogen) must be
supplied to the machine. A pressure setting above
7,5bar could damage the torch. Failure to observe
these precautions
operating temperatures or damage to the torch.
Cutting Process
The air plasma cutting process uses air or nitrogen as
primary cutting gas and as torch cooling gas.
The pilot arc is struck as follow: the torch button
energize an electrovalve (solenoid valve). This valve
lets the gas flow during the cutting and the post-flow
stages.
The design concept at the basis of these power sources
is to have available a current which remains constant at
the set value, independently from the length of the
plasma arc.
When preparing to operate, make sure you have all
materials needed to complete the job and have taken all
safety precautions. Install the machine as instructed in
this manual and remember to attach the work clamp to
the work piece.
•
With the machine switched OFF, prepare the torch
with the consumables adequate to the desired
process (CUT / GRID / GOUGE). Refer to the
Torches Instruction Manual to select the correct
combination of consumables.
•
Connect the Torch and the worck cable to the
machine.
•
Turn ON the Power Switch placed on the back of
the machine; the Power ON/OFF LED on the front
panel will turn ON. The unit is now ready to
operate.
•
Check that the primary gas is available through the
Gas Purge function.
•
Select the desired Operating Mode process.
•
Set the desired current value with the Output
Current knob.
To start the selected process just press the torch button,
making sure you are not aiming the torch gas blow
towards people or foreign objects. During the process it
is possible to hold the torch away from the work piece for
an extended period of time.
Once the process is terminated releasing off the torch
button will cause the plasma arc to be turned off; the gas
flow will continue to allow the cooling down of the torch.
The Post Flow time is proportional to the selected cutting
current and it is divided into 4 time ranges:

Cutting Speed

The cutting speed is a function of:
•
Thickness and of material to be cut.
•
Value of set current. The current setting affects the quality of the cut edge.
•
Geometrical shape of the cut (whether straight or curved).
In order to provide indications on the most suitable setting, the following table was established, based on tests performed
on an automatic test-bench; the best results however can only be achieved from direct experience by the operator in his
actual working conditions.
English
WARNING
could result in excessive
Selected Cutting Current
Less than 30A
Between 30A and 40A
Between 40A and 50A
Greater than 50A
Maintenance
For any maintenance or repair operations it is
recommended to contact the nearest technical service
center or Lincoln Electric.
performed by unauthorized service centers or personnel
will null and void the manufacturers warranty.
The frequency of the maintenance operations may vary
in accordance with the working environment. Any
noticeable damage should be reported immediately.
•
Check cables and connections integrity. Replace, if
necessary.
•
Regularly clean the torch head, check its
consumables and if necessary replace them.
Refer to the torch instructions before changing or
servicing the torch.
•
Keep clean the machine. Use a soft dry cloth to
clean the enclosing case, especially the airflow inlet
/ outlet louvers.
Do not open this machine and do not introduce anything
into its openings. Power supply must be disconnected
from the machine before maintenance and service. After
each repair, perform proper tests to check safety
requirements.
5
Post Flow Time
15seconds
20seconds
25seconds
30seconds
WARNING
Maintenance or repairs
WARNING
WARNING
English