Instructions For Use; Mma Electrode Welding - CEA MATRIX 2200 E Manual De Instrucciones

Instructions for use

COMMAND AND CONTROL UNITS (Fig. A)
Pos. 1 MX 22 command and control panel. For detailed infor-
mation on the control panel, see the instruction manual
enclosed.
Pos. 2 6 pole remote control connector.
Pos. 3 Positive pole quick connection.
Pos. 4 Negative pole quick connection.
Pos. 5 Supply switch. In the "O" position the welder is off.
Pos. 6 Mains cable.

MMA electrode welding

Electrode welding is used for welding most metals (various types
of steels, etc.) using rutilic, basic, and cellulosic electrodes with
diameters from 1.6 mm to 4.0 mm.
1) Connecting the welding cables (Fig. B):
Disconnect the machine from the mains power supply and con-
nect the welding cables to the output terminals (Positive and
Negative) of the welding machine, attaching them to the clamp
and ground with the polarity specified for the type of electrode
being used (Fig.B). Always follow the electrode manufactur-
er's instructions. The welding cables must be as short as pos-
sible, they must be near to one another, positioned at or near
floor level. Do not touch the electrode clamp and the ground
clamp simultaneously.
2) Start the welding machine by selecting position 1 on the line
switch (Pos. 5, Fig. A).
3) Make the adjustments and select the parameters on the MX
22 control panel (read the enclosed manual carefully).
4) Carry out welding by moving the torch to the workpiece. Strike
the arc (press the electrode quickly against the metal and then
lift it) to melt the electrode, the coating of which forms a protec-
tive residue. Then continue welding by moving the electrode
from left to right, inclining it by about 60° compared with the
metal in relation to the direction of welding.
PART TO BE WELDED
The part to be welded must always be connected to ground in or-
der to reduce electromagnetic emission. Much attention must be
afforded so that the ground connection of the part to be welded
does not increase the risk of accident to the user or the risk of dam-
age to other electric equipment. When it is necessary to connect
the part to be welded to ground, you should make a direct con-
nection between the part and the ground shaft. In those countries
in which such a connection is not allowed, connect the part to be
welded to ground using suitable capacitors, in compliance with the
national regulations.
WELDING PARAMETERS
Table 3 shows some general indications for the choice of elec-
trode, based on the thickness of the parts to be welded. The val-
ues of current to use are shown in the table with the respective
electrodes for the welding of common steels and low-grade alloys.
These data have no absolute value and are indicative data only.
For a precise choice follow the instructions provided by the elec-
trode manufacturer.
The current to be used depends on the welding positions and the
type of joint, and it increases according to the thickness and di-
mensions of the part.
The current intensity to be used for the different types of welding,
within the field of regulation shown in table 4 is:
• High for plane, frontal plane and vertical upwards welding.
• Medium for overhead welding.
• Low for vertical downwards welding and for joining small pre-
heated pieces.
WELDING THICKNESS (mm)
1,5 ÷ 3
3 ÷ 5
5 ÷ 12
≥ 12
Table 3
Ø ELECTRODE (mm)
2
2,5
3,2
4
4
FIG. A
Ø ELECTRODE (mm)
1,6
2
2,5
3,2
4
9
1
2
3
5
6
Table 4
CURRENT (A)
30 ÷ 60
40 ÷ 75
60 ÷ 110
95 ÷ 140
140 ÷ 190