Ferm POWER ARC WELDER 55-75 Traducción Del Manual Original página 8

EN
workpiece as if you were striking a match. This
is the best way to start the welding arc. Do not
strike the workpiece with the electrode. This
will damage the electrode and impede the
creation of the welding arc.
After creating the welding arc immediately try
to keep the distance between point of the
electrode and the workpiece equal. Keep this
distance equal to the diameter of the
electrode. Keep this distance as constant as
possible during welding.
Move the electrode in a gradual pulling
movement over the workpiece.
Keep the angle between electrode and
workpiece between 60° and 70° in the
direction of movement.
When the welded joint has been made, break
the welding arc by removing the electrode
from the workpiece.
Switch off the welding appliance.
N.B. If you leave the welding appliance
on, the likelihood is great that the
electrode will make contact (through the
work bench) with the earth cable and
spontaneously start to weld.
Remove the slag from the welded joint with a
scaling hammer.
Take care for hot flying metal particles.
Always wear protective goggles.
Never weld over slag residues: the slag forms
an insulating and contaminated layer, and as a
result weakens the weld (so-called slag
inclusion).
Brush the weld clean using a wire brush.
N.B. The workpiece is still at a very high
temperature.
Do not leave the hot workpiece
unattended.
Indicator lamp temperature
Fig.1
When the temperature of the welding appliance
becomes too high, the built-in thermostat will
switch off (indicator light comes on). The built-in
ventilator cools the machine. After cooling the
lamp goes off again.
Preferably allow the machine a sufficient time to
cool down; with intensive welding the likelihood is
great that the thermal cut-out will trigger again
8
after a few minutes.
Make sure that the machine is
disconnected before carrying out any
maintenance.
This machine has been designed to operate over
a long period of time with a minimum of
maintenance. Continuous satisfactory operation
depends upon proper machine care and regular
cleaning.
Malfunction
Should the machine fail to function correctly, a
number of possible causes and the appropriate
solutions are given below:
The welding appliance is not working.
Earth terminal does not have good contact
with the workpiece.
Electrode is not properly positioned in its
holder.
Electrode continues to 'stick' to the
workpiece.
Use the right type of electrode (universal)
Current intensity too low/turn button 3
clockwise
Electrode is orange-red.
Current intensity too high for this type of
electrode/turn button 3 anti-clockwise
lot of noise during welding.
Current intensity too high/turn button 3 anti-
clockwise
The machine is too hot; indicator lamp is on.
The ventilation slots are blocked/clean them
with a dry cloth; wait a few minutes until the
lamp goes off again.
Repairs and servicing should only be
carried out by a qualified technician or
service firm.
Ferm