37
OPERATION
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MMA
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
MMA welding
MMA (Manual Metal Arc), SMAW (Shielded Metal Arc Welding)
or just Stick Welding. Stick welding is an arc welding process which
melts and joins metals by heating them with an arc between a
covered metal electrode and the work.
Shielding is obtained from the electrode outer coating,
often called flux. Filler metal is primarily obtained
from the electrode core.
The electrodes outer coating called flux assists in
creating the arc and provides a shielding gas and
on cooling forms a slag covering to protect the
weld from contamination.
When the electrode is moved along the work piece at the correct speed the metal core deposits a
uniformed layer called the weld bead.
After connecting the welding leads as detailed above, plug your machine into the mains supply and turn
‘ON’ the machine, the power switch is located at the rear panel of the machine, place it to the "ON"
position, the panel indicator will then light up, the fan may start to rotate as the welding machine powers
up and the control panel will also light up to indicate that the machine is ready to use as shown below.
PLEASE NOTE:
Caution, when in MMA mode there is welding voltage at both output terminals.
Some welding models are equipped with the smart fan function.
When the power supply is turned on after a period before
welding starts, the fan will automatically stop running.
The fan will then run automatically when welding begins.
Now you can connect the welding leads as shown in the image
below, ensure you check that you have the electrode polarity
correct to match the welding rod being used.
In the image left, you will note that MMA has been selected
(in red) and that the MMA parameter for
current control has been highlighted
green and MMA current is adjusted
via the central control dial and is
currently set to 110 amps.
You will also note that via screen
lower bar further parameters of Hot Start and Arc Force are previewed
and there settings are also displayed.
Please Note
, the remote control option maybe turned off, so in this
case current control is via the control panel dial as shown above.
If remote control is required by the operator for use
with an EVO remote control accessory, consult the
EM
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200CT / EM
-
250CT operating manual for further details.
