STEALTH DIGI-ARC 160PFC MV
14
4.2 Welding current adjustment
Welding current range is 10~160/200A.
The DIGI-ARC 160PFC MV has a welding current pre-setting function that displays the
the amperage and allows for accurate parameters and adjustment.
4.3 Welding operation
4.3.1 Striking arc
Knocking arc: Hold the electrode upright to contact with the workpiece. After
forming a short circuit, quickly lift up about 2~4 mm, and arc will be ignited.
This method is ideal for welding brittle or hard steel.
The lift arc process is used by gently scraping the tungsten electrode onto the
work piece then lifting off once the arc is struck. Care should be taken not to put
too much pressure on the tungsten when operating in this process.
4.3.2 Manipulation of electrode
With MMA welding there are three operations:
1 The electrode moves to the molten pool
along axes
2 The electrode swings right and left
3 The electrode moves along welding way
The operator can select the appropriate
operation based on welding joint shape,
welding position, electrode spec welding
current and operational skills etc.
4.4 Welding parameters
4.4.1 Joint form in MMA
The common basic joint forms are: butt joint, lap joint, corner joint and T-joint.
OPERATION CONTROL AND CONNECTORS
11
§
4.2 Welding current adjustment
Welding current range is 10
~
160/200A
。
ARC series welder has the function of welding current pre-setting. Before
welding, adjusting welding current, the welding current display will show the ampere.
It is convenient to set parameters and adjust accurately.
§4.3 Welding operation
§4.3.1 Striking arc way
l
Knocking arc: take the electrode upright to touch the workpiece, after forming
short circuit, quickly lift up about 2~4 mm, and arc will be ignited. This method
is difficult to master. But in the welding for the brittle or hard steel, it is better to
use knocking way.
electrode
workpiece
electrode
electrode
workpiece
workpiece
Take the electrode upright
The Electrode touch the workpiece
Lift up for about 2-4mm
upright
up
touch
2
~
4mm
l
Lifting arc: take the electrode to scrape the workpiece for striking arc. But it may
cause the arc scratch, so must to lift arc in the groove.
§4.3.2 Manipulation of electrode
In MMA welding, there are three motions
to being matched in the end of electrode: the
electrode moving to the molten pool along
axes; the electrode swing right and left; the
electrode moving along welding way.
The operator can choose the manipulation
of electrode based on welding joint shape,
welding position, electrode spec, welding
electrode
workpiece
weld
1
2
3
2
1-electrode moving; 2-the electrode swing right & left; 3-the electrode move along weld
OPERATION CONTROL AND CONNECTORS
11
§
4.2 Welding current adjustment
Welding current range is 10
~
160/200A
。
ARC series welder has the function of welding current pre-setting. Before
welding, adjusting welding current, the welding current display will show the ampere.
It is convenient to set parameters and adjust accurately.
§4.3 Welding operation
§4.3.1 Striking arc way
l
Knocking arc: take the electrode upright to touch the workpiece, after forming
short circuit, quickly lift up about 2~4 mm, and arc will be ignited. This method
is difficult to master. But in the welding for the brittle or hard steel, it is better to
use knocking way.
electrode
workpiece
electrode
electrode
workpiece
workpiece
Take the electrode upright
The Electrode touch the workpiece
Lift up for about 2-4mm
upright
up
touch
2
~
4mm
l
Lifting arc: take the electrode to scrape the workpiece for striking arc. But it may
cause the arc scratch, so must to lift arc in the groove.
§4.3.2 Manipulation of electrode
In MMA welding, there are three motions
to being matched in the end of electrode: the
electrode moving to the molten pool along
axes; the electrode swing right and left; the
electrode moving along welding way.
The operator can choose the manipulation
of electrode based on welding joint shape,
welding position, electrode spec, welding
electrode
workpiece
weld
1
2
3
2
1-electrode moving; 2-the electrode swing right & left; 3-the electrode move along weld
Hold the electrode
upright
Electrode touches the
workpiece
Lift up approx 2-4mm
1 - Electrode movement.
2 - Electrode swings right and left.
3 - Electrode moves along weld.
OPERATION CONTROL AND CONNECTORS
12
current and operation skill, etc.
The details please refer to
《
Welding Dictionary
》
P69, Volume 1 of Edition 2.
§
4.4 Welding parameters
§4.4.1 Joint form in MMA
In MMA welding, the common basic joint form: butt joint, lap joint, corner joint
& T joint.
§4.4.2 Electrode selection
The electrode diameter selection is based on the workpiece thickness, welding
position, joint form, welding layer, etc. Please refer to the following table.
The welding current reference for different electrode diameter
Electrode
diameter/mm
1.6
2.0
2.5
3.2
Welding current/A
25
~
40
40
~
60
50
~
80
100
~
130
The relation between the welding current(I)’ factor(K) & electrode diameter(d) (I
=
K
×
d: Carbon electrode)
Electrode
diameter/mm
1.6
2
~
2.5
3.2
Factor/K
20
~
25
25
~
30
30
~
40
Notice: the above parameters originate from
《
Welding Dictionary
》
P66
~
P67, Volume
1 of Edition 2.
l
Electrode should be drying according to user manual before using. For reducing
the hydrogen of the molten pool and welding seam, and avoiding the blowhole
and cold crack.
l
In the welding process, the arc must not be too long; otherwise, it will cause
unstable arc burning, large spatter, light penetration, undercut, blowhole, etc. If
the arc is too short, it will cause electrode stick.
l
In MMA welding the arc length is usually equal to 0.5~1.0 time of the electrode
butt joint
lap joint
corner joint
T joint
Butt joint
Corner joint
Lap joint
T-joint
Summary of Contents for DIGI-ARC 160PFC MV
Page 1: ...Part No 9022H DIGI ARC 160PFC MV OPERATOR S MANUAL ...
Page 22: ......
Page 23: ......
Page 24: ......