PRO-POINT PN105I Manuel D'utilisateur page 13

V1.0
OPERATION
FEATURES
THERMAL OVERLOAD PROTECTION
Constantly exceeding the duty cycle can damage the cutting unit. An internal thermal protector
will open when the duty cycle is exceeded, shutting OFF all cutting unit functions except the
cooling fan. Leave the cutting unit turned ON with the fan running. The thermal protector will
automatically reset and the cutting unit will function normally again once it has cooled.
Wait at least another 10 minutes after the thermal protector opens before resuming cutting.
Starting before this additional time may result in a shortened duty cycle.
OVER-VOLTAGE
This equipment has an automatic voltage compensation function, which enables the unit to
maintain the voltage within the given range. In case that the input voltage or amperage exceeds
the stipulated value, it is possible to damage the equipment's components. Please ensure your
primary power supply is correct (see Specifications).
OPERATING THE WELDING UNIT
1. Switch the wire size selector (A) to match the wire diameter installed.
2. Turn the synergic control knob (B) to select the power. The higher the number, the more
power is applied to the weld.
3. Turn the gas on at the cylinder, unless you are using flux cored wire.
4. Turn the power on with the power switch (I).
5. Squeeze the welding torch trigger to start welding. The welding unit will automatically
control the wire speed.
6. Adjust the wire speed and power with the synergic control knob.
7. Release the trigger when the weld is complete.
MIG (METAL INERT GAS) WELDING
MIG (metal inert gas) welding, also
known as GMAW (gas metal arc welding)
or MAG (metal active gas welding), is a
semi-automatic or automatic welding
process in which a continuous and
consumable wire welding wire and a
shielding gas are fed through a welding
torch. A constant voltage, direct current
power source is most commonly used
with MIG welding.
SHORT-CIRCUIT TRANSFER
Short-circuit transfer is the most common used method. The wire welding wire is fed
continuously down the welding torch until it exits from the contact tip. The wire touches the
workpiece and causes a short-circuit. The wire heats up and begins to form a molten bead, the
bead separates from the end of the wire and forms a droplet that is transferred into the weld
pool. This process is repeated about 100 times per second, making the arc appear constant to
the human eye.
1. The wire approaches the workpiece and touches the work creating a short-circuit between
the wire and the base metal, because there is no space between the wire and the base
metal there is no arc and current flows through the wire (Fig. 13)
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GASLESS MIG WELDER PN105I 8958696
Fig. 12
13