3.3
Installation
&
Operation
for MMA
Welding
3.3.1
Set up
installation
for MMA
Welding
Connection of Output Cables Two sockets are available on this welding machine. For MMA welding the
electrode holder is shown be connected to the positive socket, while the earth lead (work piece) is connected
to the negative socket, this is known as DCEP. However various electrodes require a different polarity for
optimum results and careful attention should be paid to the polarity, refer to the electrode manufacturers
information for the correct polarity.
DCEP: Electrode connected to “+”output socket.
DCEN: Electrode connected to“-” output socket.
(1)
Connect the earth lead to “-”, tighten clockwise;
(2)
Connect the earth clamp to the work piece. Contact with the work piece must be firm contact with
clean, bare metal, with no corrosion, paint or scale at the contact point.
(3)
Connect the electrode lead to “+”, tighten clockwise;
(4)
Each machine is equipped with a power cable should be based on the input voltage welding power
cable connected to the appropriate position, not to pick the wrong voltage;
(5)
With the corresponding input power supply terminal or socket good contact and prevent oxidation;
(6)
With a multi meter measure the input voltage is within the fluctuation range.
3.3.2
Operation
for MMA
Welding
(1)
According to the above method to install is correct, turn the power switch, so that the power switch is
“ON” position, then the power indicator light, the fan comes on, the device work properly.
(2)
Set the welding mode button to ‘MMA’.
(3)
Set the welding parameters as required using the parameters control knob (following the instructions in
the previous section).
(4)
Place the electrode into the electrode holder and clamp tight.
(5)
Strike the electrode against the work piece to create and arc and hold the electrode steady to
maintain the arc.
(6)
Commence welding. If necessary, readjust the Welding parameters control knob to obtain the welding
condition required.
(7)
After completion of welding the Power Source should be left turned ON for 2 to 3 minutes. This allows the
fan to run and cool the internal components.
(8)
Switch the ON/OFF Switch (located on the rear panel) to the OFF position.
NOTE:
-
Note the polarity of wiring, the general DC welding wire in two ways. Selected according to the
technical requirements of welding the appropriate connection, if you choose incorrectly will result in arc
instability and spatter large adhesion and other phenomena, such cases can be quickly reversed to
joints.
-
If the work piece distance from the welding machine, the second line(electrode holder and ground) is
longer, so choose the appropriate conductor cross-sectional area should be larger to reduce cable
voltage drop.
Содержание GRAND TIG 250 DC PULSE
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