CEA MATRIX 4000 AC/DC R, Руководство оператора

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7
Electrode welding (MMA)
Electrode welding is used to weld most metals (different types
of steel, etc.) using coated rutilic and basic electrodes with di-
ameters ranging from Ø 1.6 mm to Ø 8 mm.
CONNECTION OF THE WELDING CABLES (Fig. G)
With the machine disconnected from the supply, connect the
welding cables to the out terminals (positive and negative) of
the welder, connecting them to the gripper and the ground, with
the correct polarity provided for the type of electrode to be used
(Fig. G). The welding cables must be as short as possible, close
to one other, and positioned at floor level or close to it.
PART TO BE WELDED
The part to be welded must always be connected to ground
in order 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 damage to other electric equipment. When it is nec-
essary to connect the part to be welded to ground, you should
make a direct connection between the part and the ground
shaft. In those countries in which such a connection is not al-
lowed, connect the part to be welded to ground using suit able
capacitors, in compliance with the national regulations.
WELDING PARAMETERS
Table 4 shows the values of current to use with the respective
electrodes for the welding of common steels and low-grade al-
loys. These data have no absolute value and are indicative data
only. For a precise choice follow the instructions provided by
the electrode manufacturer. The current to be used depends
on the welding positions and the type of joint, and it increas-
es according to the thickness and dimensions 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.
A fairly approximate indication of the average current to use in
the welding of electrodes for ordinary steel is given by the fol-
lowing formula:
I = 50 × (Øe - 1)
Where:
I = intensity of the welding current
Øe = electrode diameter
Example: for electrode diameter 4 mm
I = 50 × (4 -1) = 50 × 3 = 150A
Maintenance
ATTENTION: Before carrying out any inspection of the inside
of the generator, disconnect the system from the supply.
SPARE PARTS
Original spare parts have been specially designed for our
equipment. The use of non-original spare parts may cause
variations in performance or reduce the foreseen level of safety.
We decline all responsibility for the use of non-original spare
parts.
GENERATOR
As these systems are completely static, proceed as follow:
• Periodic removal of accumulated dirt and dust from the inside
of the generator, using compressed air. Do not aim the air
jet directly onto the electrical components, in order to avoid
damaging them.
• Make periodical inspections in order to individuate worn ca-
bles or loose connections that are the cause of overheating.
Optional
The remote controls can be only used in the 2-STROKE and
4-STROKE welding modes.
MANUAL REMOTE CONTROL
WARNING: When using the machine for TIG welding it is OB-
LIGATORY to use the kit for simultaneously use – CEA code
n° 460056.
Weld current can be measured at a distance by connecting up
this control. The display will show the previous maximum weld
current value set on the welder. The remote control will adjust
welding current from the minimum to this value (for further infor-
mation see the MTA control panel manual). Just turn the adjust-
ment knob on the welder to change the maximum output value.
FOOT SWITCH
The foot switch replaces the torch button and the welding cur-
rent setting knob. The display will show the previous maximum
weld current value set on the welder. The pedal will adjust the
welding current from the minimum to this value (for further infor-
mation see the MTA control panel manual). Just turn the adjust-
ment knob on the welder to change the maximum output value.
NOTE:
• To use the pedal control correctly, set the “welding mode”
to 2-STROKE and then the welding parameters SLOPE UP
time to 0 sec., SLOPE DOWN time to 0 sec.
Table 4
Ø ELECTRODE
(mm)
ELECTRODE TYPE - Current adjustment field (A)
WELDING
THICKNESS
(mm)
6010
6011
6012 6013 6020 6027 7014
7015
7016
7018
7024
7028
1,6 - 20-40 20-40 - - - - - -
≤ 5
2 - 25-60 25-60 - - - - - -
2,4 40-80 35-85 45-90 - - 80-125 65-110 70-100 100-145 ≤ 6,5
3,2 75-125 80-140 80-130 100-150 125-185 110-160 100-150 115-165 140-190 > 3,5
4 110-170 110-190 105-180 130-190 160-240 150-210 140-200 150-220 180-250 > 6,5
4,8 140-215 140-240 150-230 175-250 210-300 200-275 180-255 200-275 230-305
> 9,5 5,6 170-250 200-320 310-300 225-310 250-350 260-340 240-320 260-340 275-365
6,4 210-320 250-400 250-350 275-375 300-420 330-415 300-390 315-400 335-430
8 275-425 300-500 320-430 340-450 375-475 390-500 375-475 375-470 400-525 > 13