Scheppach WSE4000-Multi Original Bedienungsanleitung Seite 34

In order to anticipate or reduce deformations that can
occur during material hardening, it is good to fix the
workpieces with a clamping device. Avoid stiffening
the welded structure to prevent fractures in the weld.
These difficulties can be reduced if it is possible to
rotate the workpiece so that the welding can be carried
out in two opposite passes.
Wire diameter in mm x 10 = Gas flow in l/min
For a 0.8 mm wire, for example, this results in a value
of approx. 8 l/min.
Machine setting for welding without inert gas
If you use flux-cored wire with integrated inert gas,
there is no need to supply external inert gas.
• First connect the polarity changeover (6) with the
negative pole (4). Lock the connector by turning it
clockwise.
• Then connect the earth clamp (5) with the
corresponding positive terminal (3) and turn the
terminal clockwise to fix it.
• Insert the flux-cored wire as described under
"Assembly of the welding wire reel".
Device setting for welding with rod electrodes
1 Select the MMA welding function (18) on the
selection button (16).
2 Connect the earth cable (5) to the positive terminal
(3) marked and lock the connector by turning it
clockwise.
3 Next, connect the welding cable to the negative
terminal (4) and lock the connector by turning it
clockwise. NOTE! The polarity of the wires may
vary! All information regarding polarisation should
be available on the packaging of the electrodes
supplied by the manufacturer!
4 Now the mains cable can be connected and the
power supply activated. After connecting the earth
cable to the welding machine, work can begin.
MMA welding
• Prepare the device as described previously under
"Device setting for welding with rod electrodes".
• Put on suitable protective clothing in accordance
with the specifications and prepare your workplace.
• Connect the earth clamp (5) to the workpiece.
• Clamp the electrode in the electrode holder
(available as an option).
• Switch the device on by setting the ON/OFF switch
(1) to the "I" ("ON") position.
34 | GB
• Select "MMA" mode by pressing the selection button
(17) until the indicator light next to "MMA" (18) lights
up.
• Adjust the welding current with the welding current
adjustment potentiometer (15) to suit the electrode
used.
• Hold the protective welding mask in front of the face
and start welding.
• To complete the working process, set the ON/OFF
switch (1) to the "O" ("OFF") position.
Electrode Ø (mm)
1,6
2
2,5
3,2
m Attention!: The earth clamp (5) must not be brought
into direct contact with either the electrode holder or
the electrode.
m Attention!: Do not dab the electrode on the
workpiece. It could be damaged and the ignition
of the arc could be made difficult. Once the arc has
ignited, try to maintain a distance from the workpiece
that corresponds to the electrode diameter used.
The distance should remain as constant as possible
while you are welding. The electrode inclination in the
working direction should be 20–30 degrees.
m Attention!: Always used tongs to remove used
electrodes or move hot workpieces. Note that the
electrode holder must always be placed on an
insulating base after welding.
The slag should only be removed from the seam once it
has cooled. To continue a weld on an interrupted seam:
• First remove the slag at the connection point.
• The electric arc is struck in the weld groove, guided
to the connection point, properly melted there and
then continued along.
m Attention!: The welding work generates heat.
Therefore, the welder must be left idle for at least half
an hour after use. Alternatively, let the device cool
down for one hour. The device must not be packed and
stored until its temperature has normalised.
m Attention!: A voltage that is 10% lower than the
rated input voltage of the welding machine can lead to
the following consequences:
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Welding current (A)
25 - 40 A
40 - 60 A
50 - 80 A
80 - 130 A