Linz electric E1W13 DC Instrucciones Para El Uso Y Mantenimiento página 17

7. DESCRIPTION OF ALTERNATOR/WELDER WORKING PRINCIPLES
On the front panel you can find the following components (figure 13/A, 13/B, 13/C, 13/D):
1. Range of welding current in Amps / Function
2. "Welding Current" potentiometer for fine regulation of welding current.
3. Potentiometer selector "Local/Remote".
4. Remote potentiometer connector
5. Quick plug of (+) welding
6. Quick plug of (-) welding
7. Magnetothermic switch for alternator's function
8. Three-phase 16A CEE socket
9. Single-phase 16A CEE socket
Starting of the set (drive motor and alternator/ welder)
(the numbers in brackets refer to figure 8)
During every start, selector (1) must be on position "Generator-Start" to guarantee the alternator self-energising.
Working as alternator: In this function selector (1) must be on position "Generator-Start" to use an electronically controlled
voltage generator that grants the best performances either with three phase or single phase loads. In this function the opera-
tor can use the sockets mounted on the main panel (8) and (9) with a magnetothermic switch (with earth leakage breaker
on demand) (7) that dissect the generator loads, protect against overloads and (with earth leakage breaker) protect persons
from indirect contacts.
Working as direct current welder: In this function the selector (1) must indicate the current range indicated on the packing
of electrodes that will be welded. Welding cables (5) and (6) must be connected to the correct polarity also depending from the
instructions on the electrode packing. Using the potentiometer for fine regulation of welding current (2), it is possible to set
the most suitable current to weld the used electrode, (see paragraph Installation).
Important: every time the machine is used as welder it is necessary to switch off the magnetothermic switch (7) to avoid any
damage that can be caused by voltage fluctuations on the sockets while the machine is welding.
8. SAFETY INSTRUCTIONS FOR WELDING
- Avoid any direct contact with the welding circuit, the arc striking tension of the welding outlet can be dangerous in some
circumstances.
- Effect checkout and repairing operations of the system only when the generator is completely stopped.
- Accomplish equipotential connection of all metallic parts according to national safety rules, as well as for any eventual
connection to earth
- Do not use the machine in damp or wet places or in the rain.
- Do not use cables with worn insulation or loose connections.
- Do not weld on containers or pipes which have held flammable materials or gaseous or liquid combustibles.
- Remove from working area all flammable materials like wood, paper, rags, etc.
- Provide an adequate ventilation or facilities for removal of welding fumes near the arc.
- Always protect your eyes with fitting adiactinic glasses mounted on welding masks or helmets. Use proper gloves or
protecting clothes avoiding the exposure of your skin to the welding arc.
9. INSTALLATION
Site: The machine must be located in a place where openings for inlet and outlet of cooling air are not obstructed. Furthermore
check that conductive dusts, corrosive vapours, humidity, etc. will not enter into the machine.
Connection of welding cables: Cable with "electrode holder" gun is normally connected to positive (+) terminal (5).
The earth return cable is normally connected to negative (-) terminal (6) of the welder, earth terminal, in the opposite side of
the cable, must be connected to the work piece or a metallic work bench as near as possible to the joint to be made.
Connected cables must be turned fully into the quick plugs (3) and (4) to ensure a good electrical contact (loose connections
will cause overheating with consequent rapid deteriorations of the same). Avoid using welding cables having length over 10 m.
Avoid using welding cables of length over 10m.
10. WELDING
The majority of the covered electrodes has to be connected to positive pole (+) but some electrodes has to be connected to the
negative pole (-). Always verify the instructions about polarity and most suitable current values on electrodes packing. Welding
current must be regulated according to electrode diameter and the type of joint to be effected.
Parameter (figure 6)
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 do not depends by the used current intensity only, 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 7.
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.
- 17 -
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