3. Slow solidification
The cover is thicker than the other two types and
consists less organic material. Thick compact slack.
The meltingbath is very thin liquid. Connections
most of the time in horizontal direction. For welding
aluminium and stainless steel special electrode are
available. Ask for advice from your local Ferm-dealer.
PERFORMANCE
The performance of this welder may be expressed by the
number of electrodes : nc and nh.
nc: Refers to the number of electrodes which may be
welded when the welder commences at room tempera-
ture until the thermostat intervenes.
nh: Refers to the AVERAGE VALUE of the number of
electrodes which may be welded between re-start and
intervention of thermostat, in the first hour of use.
WELDINGCURRENT
By turning the wheel clockwise the current is increased.
By turning the wheel counter-clockwise the current is
decreased. The value of the current (I2) may be read on
the graduated scale on the upper panel and corresponds
to the voltage of the arc (U2) according to the equation
U2(V)=18 + 0,04 x I2 (EN 50060). When you’re using
long extension cables, the current is reduced considera-
bly. The required current also depends on the size of the
workpiece. Small workpieces require a smaller current.
Workpiece Electrode core Welding
thickness Ø (mm2) current (A)
2 - 3 2 4 5 - 6 5
4 - 5 2,5 70 - 95
6 - 7 3,25 90 - 130
8 - 12 4 130 - 160
Tab.1
OPERATING THE MACHINE
COLLET CABLE
This has a special clamp on the terminal to attach to the
exposed part of the electrode.
WORK CABLE
This must be directly connected to the workpiece or the
work bench.
Make sure contact to workpiece is adequate by
avoiding varnished surfaces and/or non-metallic
materials.
PROTECTIVE MASK
Fig.B
This must ALWAYS be used during welding and protects
the eyes from the light radiation produced by the arc.
The mask alows observation of the welding being carried
out.
1. Mask
2. Glass
3. Filter
4. Handgrip
Assemble the welding glass and the cover glass,
before you begin to weld.
Never look directly into the arc without the use of a protective
mask.
SCALING HAMMER
With this hammer the slack of the welded connection
can be removed. Do not hit too hard, otherwise the con-
nection will be damaged. Always use safety glasses.
STEELBRUSH
With this steelbrush you can remove rust before atta-
ching the work cable to the workpiece or to remove the
slack after welding.
CHARACTERISTICS OF THE WELD SEAM
Fig.C
1. Advancement too low
2. Excessive advancement
3. Arc too short
4. Arc too long
5. Current too low
6. Current too high
7. Current correct
Ferm 544 Ferm
