3.4 ADJUSTING THE GAS FLOW
For accurate gas flow rate adjustments, use the
following table.
A
B
C
D
E
A:
B:
C:
D:
E:
Appropriate pressure on wire and appropriate roll size
(canal depth) selection.
Over pressure on wire may result in deformation of
the shape of the wire.
Over pressure on wire may result in deformation of
the shape of the feed roll.
Roll size is small. The result is deformation of the
shape of the wire.
Roll size is too big. Wire may not be driven to the
welding point.
Figure 11:
Mistakes at Pressure Adjustment and Choice of Rolls
The effects which are seen in side
table occur in case adjusting the
pressure assembly too tight or loose
or choosing wrong feeding rolls
(Figure 11).
TAHTA
1
2
3
4
Figure 10:
Threading Wire Through Torch and Adjusting Pressure
1
4
5
2
3
Push down the pressure roll
, push up and lock
the spring knob
.
In the meantime by
triggering the torch switch on and off, check if the
tension of the wire is correct, that is, neither too
tight, nor loose. Then reinstall the contact tip and
the nozzle
.
Feed the wire on a piece of wood
in order to
check and adjust the pressure of the roll
via
spring knob
. Cut off wire
(Figure 10).
(28)
[1]
(29)
[3]
[4]
[5]
(31)
[6]
Hold the torch switch pressed
until the wire
comes out of the torch.
[2]
6
Figure 9:
Threading the Wire
1
2
3
11
Monomag 180
OPERATION
Mild
Steel and
Metal Cored
Diameter
8 lt/min
9 lt/min
10 lt/min
Stainless
Steel
Aluminium
8 lt/min
9 lt/min
10 lt/min
8 lt/min
9 lt/min
10 lt/min
Flux
Cored
7 lt/min
8 lt/min
9 lt/min
Practical adjustment of the gas flow rate (CO , Ar,
MIX) is 10 times of the diameter of the wire.
Diameter of the wire: 0,9 mm
Gas flow rate: 10 x 0,9 = 9 lt/min
2
EXAMPLE:
UNLOCK THE WIRE PRESSURE
ASSEMBLY DURING GAS FLOW
ADJUSTMENT.