Welding Table; Connection For Mma Welding; Igniting The Mma Arc - Fimer TT258 EVO Manual De Instrucciones

4. WELDING TABLE

Use the table below to calculate the
welding current, according to the type of
electrode used:
ELECTRODE WELDING
DIAMETER CURRENT
mm
2.0 45 ÷ 60
2.5 60 ÷ 100
3.25 90 ÷ 140
4.0 140 ÷ 170
5.0 190 ÷ 230

5. CONNECTION FOR MMA WELDING

The Dinse connector is inserted by
lining-up the key with the groove and
turning the connector in a clockwise
direction until it stops.
The electrode clamp holder and earth must
be connected to the '+' and '-' terminals,
according to the specifications of the
electrodes used.
8
ELECTRODE
LENGTH
A mm
300
300
450
450
450

6. IGNITING THE MMA ARC

IGNITION
Create the contact for
igniting the arc at a
distance
approximately 5 cm from
the initial welding point.
Immediately
electrode
workpiece, without touching
it, in order to keep the arc
ignited.
Quickly
electrode, without turning
off the arc, towards the
point where the welding
seam will begin.
Begin welding, advancing
slowly.
between the tip of the
electrode
workpiece must be as
identical as possible to the
diameter of the electrode
in use.
OFF
This is carried out by stopping a while over
the last crater (i.e. the end of the welding
seam), returning slowly on the previously
deposited seam for approximately two
centimetres and, only at this point, moving
the electrode away from the workpiece to
turn off the arc.
of
move the
towards the
bring the
The distance
and the