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gas bottle valve.
- Open the gas bottle and adjust the quantity of gas (l/min.) according to the
welding, always using the ring nut of the pressure reducer. Check the seal of the
hoses and connections.
- Connect it to the piece to be welded or the metal bench on which the workpiece is
placed, as close as possible to the joint being worked. Connect this cable to the
clamp with the symbol (+) (Fig. B-3).
- Insert the current cable into the relative quick coupling (-) (Fig. B-4). Connect the gas
hose of the torch to the gas bottle
Almost all the coated electrodes are connected to the positive pole (+) of the generator,
with an exception for acid coated electrodes, which must be connected to the negative
pole (-).
Takes a special clamp for tightening the uncovered part of the electrode to the terminal.
Connect this cable to the clamp with the symbol (+) (Fig. B-3).
- Connect it to the piece to be welded or the metal bench on which the workpiece is
placed, as close as possible to the joint being worked. Connect this cable to the
clamp with the symbol (-) (Fig. B-4).
MAKE SURE THE WIRE FEEDERS, THE WIRE GUIDE HOSE AND THE TORCH
CONTACT PIPE CORRESPOND WITH THE DIAMETER AND NATURE OF THE
WIRE TO BE USED AND THAT THEY ARE CORRECTLY MOUNTED. DO NOT
WEAR PROTECTIVE GLOVES WHEN THREADING THE WIRE.
- Open the reel area door.
- Unscrew the spool lock nut.
- Position the wire spool on the reel; make sure the reel pulling pin is correctly housed
in its hole
.
- Tighten the spool lock nut, using spacers as and where necessary
- Free the pressure counter-roller/s and distance it/them from the lower roller/s
- Make sure the pulling feeder/s is/are suitable for the wire being used
- Free the wire end, cut off the misshaped end by cutting it cleanly and without leaving
a burr; rotate the spool counter-clockwise and position the wire end into the wire feed
input, pushing it by 50-100 mm into the torch connecting wire feed
- Reposition the counter-roller/s, adjusting the pressure at an intermediate value,
make sure the wire is positioned correctly in the hollow of the lower feeder/s
- Remove the nozzle and contact tube
- Insert the welding machine plug into the mains socket, switch on the welding
machine, press the torch push-button or the wire forward push-button (Fig. C-2) and
wait for the end of the wire which is running along the whole wire feed casing, to exit
by 10-15 cm from the front of the torch, then release the push-button.
- Do not direct the torch mouth against parts of the body.
- Do not approach the torch gas cylinder.
- Remount the contact tube and the nozzle onto the torch
- Make sure the wire exits regularly; set the roller pressure and reel braking
lowest values possible, making sure the wire does not slide in the hollow and that
when the drive stops the wire turns do not become loose because of too much spool
inertia.
- Cut the end of the wire that exits from the nozzle by 10-15 mm.
- Close the reel area door.
Before replacing the sheath, straighten out the torch cable to make sure there are no
loops.
1- Remove the nozzle and contact tube from the torch head.
2- Unscrew the sheath lock nut on the central connector and slide out the existing
sheath.
3- Slide the new sheath into the torch cable and gently push it until it comes out of the
torch head.
4- Hand tighten the sheath lock nut back in place.
from the torch cable.
6- Bevel the sheath cutting zone and reposition it in the torch-cable duct.
7- Use a key to tighten the lock nut back in place.
8- Remount the contact tube and the nozzle.
Perform operations 1, 2 and 3 foreseen for steel sheaths (do not consider operations
4, 5, 6, 7 and 8).
9- Screw the aluminium contact tube back in place checking that it comes into contact
with the sheath.
10- Insert the brass nipple, the OR ring onto the opposite end of the sheath (torch
coupling side), maintain a light pressure on the sheath and tighten the sheath lock
nut. The excess section of the sheath shall be removed later on (see (13)). Slide
out the capillary tube for steel sheaths from the wire feeder torch coupling.
11- NO CAPILLARY TUBE IS FORESEEN for aluminium sheaths with diameters of
1.6-2.4 mm (yellow colour); the sheath will be inserted in the torch coupling without
it.
.
.
.
.
.
Cut the capillary tube for aluminium sheaths measuring 1-1.2 mm (red colour) to
a length of 2 mm less than the one used for the steel tube and insert it on the free
end of the sheath.
12- Insert and block the torch in the wire feeder coupling, mark the sheath at 1-2 mm
from the rollers, now extract the torch again.
13- Cut the sheath to the foreseen measurement without deforming the inlet hole.
Remount the torch in the wire feeder coupling and mount the gas nozzle.
Wire welding and detachment of the drop takes place via subsequent short-circuits of
the wire tip and weld pool (up to 200 times per second). The stick-out length of the wire
is normally between 5 and 12mm.
- Usable wire diameter:
- Usable gas:
- Usable wire diameter:
- Usable gas:
- Usable wire diameter:
- Usable gas:
PROTECTION GAS
zone and therefore has the advantages of fast welding and no seams with remarkably
low current values, which can satisfy the requirements of many typical "short-arc"
applications.
Each current pulse corresponds to the detachment of a single drop of the electrode
wire; this takes place at a frequency which is proportionate to the wire feeder speed,
with variations related to the type and diameter of the wire itself (typical frequency
values: 20-300Hz).
- Usable wire diameter:
- Usable gas:
- Usable wire diameter:
- Usable gas:
- Usable wire diameter:
- Usable gas:
- Usable wire diameter:
- Usable gas:
Typically the contact tube must be inside the nozzle by 5-10 mm, the further it is in,
;
the higher the arc voltage will be; the stick-out of the wire will normally measure from
10 to 12 mm.
: welding in "position" on medium-small thicknesses and on thermally
susceptible materials,
.
PROTECTION GAS
ROOT MIG is a particular type of Short Arc MIG welding designed to maintain the
welding bath even colder than the Short Arc itself. Thanks to the very low level of heat,
it is possible to deposit welding material with minimal deformation of the surface of the
DEEP MIG is an advanced MIG Spray Arc welding arc that gives a hotter and deeper
to the
weld pool than the traditional Spray Arc method. During welding, the machine adjusts
a constant arc length that guarantees a regular energy supply, even if the distance
between the welding torch and the workpiece varies.
This process is recommended for welding pieces that are more than 2 mm thick,
because the notable heat transfer prevents some welding faults that appear more
easily using a normal Spray Arc.
The most evident advantages when using the DEEP MIG mode are:
- Lower risk of the material not melting.
- Less need to adjust the welding parameters.
- Easy to use in production processes.
- Lower reworking costs because of lower welding faults.
Manual mode settings (Fig. L-1)
The user can customise the following welding parameters (Fig. L-2):
-
: welding voltage;
-
: wire feed speed;
-
welding is stopped.
-
welding.
-
: Electronic reactance. A higher value determines a hotter welding bath;
-
: Burn-back. Use to adjust the wire burn-back time when welding is stopped;
- 8 -
0.6 - 0.8 - 0.9 - 1.0 - 1.2 - 1.6 mm
CO
or Ar/CO
2
0.8 - 0.9 - 1.0 - 1.2 - 1.6 mm
Ar/O
or Ar/CO
mixtures (1 - 2 %)
2
2
0.8 - 1.0 - 1.2 mm
0.8 - 1.0 - 1.2 - 1.6 mm
0.8 - 1.0 - 1.2 mm
Ar/O
or Ar/CO
mixtures (1 - 2 %)
2
2
0.8 - 1.0 - 1.2 mm
.
mixtures
2
Ar
Ar/CO
mixtures
2
Ar
0.8 mm
Ar
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