light, the fan comes on, the device work properly.
2. Set to ‘MMA’ welding mode.
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.
6.3. INSTALLATION & OPERATION FOR
MMA WELDING
6.3.1. 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;
7. The power ground is well grounded.
6.3.2. 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
24
1.995.229 EN - Rev. 1.1
NOVATIG 403 DC PULSE
