Linz electric E2W10 DC Instrucciones Para El Uso Y Mantenimiento página 12

Parameter (figure 5)
FLAT
α 20°
g (mm) 2÷3
s (mm) 2÷3
As indication you can find here below a table with currents and electrode diameters:
Electrode diameter (mm)
1.6
2
2.5
3.2
4
5
The user must consider that in case of same electrode diameter, higher current values must be used for flat welding and lower
values for vertical and overhead welds.
The quality of the weld depends not only by the used current intensity, but also by electrode type and diameter, arc length, speed
and position of the execution and state of the electrodes which should be preserved from damp in theirs packing.
Procedures
Holding the mask in front of the face, strike the electrode tip on the work piece as if you were striking a match.
Do not hit the electrode on the work piece because you could damage the electrode covering and make strike-up difficult.
As soon as arc is ignited, maintain a distance from the work piece equal to the diameter of the electrode; keep an angle of
20° - 30° as it advances.
For problems relevant to welding current see figure 6.
A) Advancement too slow;
B) Arc too short;
C) Current too low;
D) Advancement too fast;
E) Arc too long;
F) Current too high;
G) Proper welding bead.
Position
Vertical Overhead
30° 40°
3÷4 2÷3
2÷3 2÷3
Welding current (A)
min max.
25 ÷ 50
40 ÷ 80
60 ÷ 110
80 ÷ 160
120 ÷ 200
150 ÷ 250
11. TROUBLE SHOOTING FOR E2W10 DC SERIES
FAILURE CAUSES
Alternator do not delf- 1) Insufficient residual voltage
energise 2) Connection break
3) Three-phase diode bridge is broken
4) Insufficient speed
5) Windings breakdown
6) Poor contact of the brushes
Low no-load voltage 1) Low revolving speed
2) Poor contact of the brushes
3) Windings breakdown
4) Three-phase diode bridge is broken
Unstable voltage
1) Rotating mass too small
2) Uneven speed
3) Poor contact on collector
No delivery of current 1) Intervention of thermal protection
when used as welder 2) Diode bridge is broken
but the machine works 3) Reactance/compound is broken
properly as alternator 4) Welding rectifer is broken
5) Breackdown of the welding winding
Unstable current as 1) Current or polarity is not correct
welder but the machine
for the type og electrode
works properly as 2) Welding rectifer is broken
alternator
Noisy Sound 1) Defective mechanical coupling
2) Short circuit in one of the windings or
on the load
3) The bearing is broken
- 12 -
INTERVENTION
1) Excite the rotor using a battery
2) Reset the connection
3) Replace three-phase diode bridge
4) Adjust speed regulator of the drive motor
5) Check winding resistances and replace
damaged part
6) Clean and check the slipring
1) Adjust speed regulator of the drive motor
2) Clean and check or replace the slipring
3) Check winding resistances and replace
damaged part
4) Replace three-phase diode bridge
1) Increase the flywheel of the drivemotor
2) Check and repair speed regulator of the
drive motor
3) Check and clean the slipring and brushes
1) Wait the automatic flywheel of the
drive motor
2) Check and replace the diode bridge
3) Check and replace the reactance/
compound
4) Replace the welding rectifer
5) Check the resistance and replace the
broken part
1) Check current setting and polatity of
the electrode
2) Check and replace the welding rectifer
1) Check and modify the alignment
2) Check windings and load
3) Replace the broken bearing