DWT MMA-180 I, Original Instructions Manual

Page: 24 / 176

24
English
1
Machine
components
On / off switch
2 Vent hole
3 Grounding bolt
4 Current meter
5 Temperature protection indicator ("O�C�")
6 Power indicator
7 Arc force control
8
Current control ("Current")
9 "-" socket
10 "+" socket
11 Carrying handle
12 Earth clamp (assembled)*
13 Electrode holder (assembled)*
14 Allen key *
15 Earth wire *
16 VRD on / off switch
17 VRD indicator
18
Carrying belt *
19 Chipping hammer / wire brush *
20 Gloves *
21 Welding mask (assembled) *
22 Handle of welding mask *
23 Shell of welding mask *
* Optional extra
Not all of the accessories illustrated or described
are included as standard delivery.
Installation and regulation
of machine elements
Before carrying out any works on the machine it
must be disconnected from the mains.
Do not draw up the fastening elements
too tight to avoid damaging the thread.
Mounting / dismounting / setting-up of
some elements is the same for all machine
models, in this case specific models are
not indicated in the illustration.
Mounting / dismounting of a plug, current-carrying
cable, stationary network connection
Some machine models are supplied without plugs
and / or current-carrying cables - they must be installed
before the beginning of the operation�
Machines can also be connected to the network on a
stationary basis (not through a socket)�
Note: the stationary connection of the
machine to the network as well as instal-
lation or replacement of current-carrying
cables, plugs and other electrical units
must be performed only by a qualified electrician
or circuit installer authorized to perform such
works.
Welding mask assembly (see fig. 1)
Assemble the welding mask 21 as shown in figure 1.
Connection to the earthing loop (see fig. 2)
Using grounding bolt 3 connect one earth wire clamp 15
to the machine (see fig. 2). Connect the second earth
wire clamp 15 to the working earth loop�
Connecting / disconnecting welding cables (see fig. 3)
Insert plugs of the welding cables to the machine as
shown on figure 3. Disconnect plugs of the welding
cables in a reverse order�
If necessary to attach the connector to the welding
cable, follow the steps shown in figure 3.
Initial operating
of the machine
Before starting the operation the following steps are
necessary:
• always use the correct supply voltage: the power
supply voltage must match the information quoted
on the machine body;
• inspect the condition of all cables and replace the
cable where damage is found;
• inspect the condition of electrode holder 13 and
earth clamp 12 and replace it if damage is found�
• Before switching on the machine make sure that
electrode holder 13 and earth clamp 12 do not touch
each other�
• After the machine is switched on, make sure that the
built-in cooling fan is working - the air will be blowing
from vent holes 2 (on the back of the machine)�
Switching the machine
on / off
Switching on:
Move switch 1 into the "On" position (indicator 6 will
then light up and the built-in cooling fan will start
rotating)�
Switching off:
Move switch 1 into the "Off" position�
Design features
of the machine
Temperature protection
Temperature protection prevents machine damage,
switching it off in case of overheating� When
temperature protection goes on, indicator 5 lights up�
Do not switch the machine off, let it cool down and do
not continue operation until then�
Welding current control ("Current" control)
Control 8 enables to set the welding current value
based on the performed works, the thickness of the
pieces to be welded, the electrode diameter, etc�
The set welding current value is shown on current
meter 4 �
Arc force ("Arc force" control)
[MMA-400 T]
The arc force function allows the sticking of the
electrode to a piece to be welded to be prevented�