Before Commissioning; Operation; Welding Preparations - Scheppach WSE850 Originalbetriebsanleitung

Explanation of the symbols on the
main label
Corresponding welding current
Corresponding welding voltage
On-load factor %
The device is suitable for
welding in environments
increased electrical hazard.
Single-phase static frequency
converter transformer rectifier
Symbol for falling characteristic
curve
Manual arch welding with coated
electrodes
Single-phase mains connection
Direct current

7. Before commissioning

• Check the electrical connection for sufficient protec-
tion (16 A)
• Wear required clothing see fig 3:
1. Welder's helmet
2. Welder's apron
3. Welder's gloves
• Make sure that no other persons stay in working or
hazardous area.
• Make sure that no combustible materials are found
in the working area.
Connecting to the mains power supply
• Before you connect the power cable (7) to the mains
power supply, make sure that the data on the rating
plate is the same as that for your mains supply.
Important! The mains plug may only be replaced by a
qualified electrician.
Connecting the welding cable (Fig. 4)
• Important! Always make sure the device is un-
plugged before carrying out any connection work on
the welding cable (8/9)!
• Connect the welding cable as shown in Fig. 4. To do
so, connect the two connectors (10) on the electrode
holder (8) and the ground terminal (9) to the cor-
responding quick-lock couplings (5/6) and lock the
connectors (10) in place by turning them in a clock-
wise direction.
• The cable with the electrode holder (8) is normally
connected to the positive pole (5) and the cable with
the ground terminal (9) to the negative pole (6).
Switching ON/OFF (Fig. 2)
• To switch on the device, turn the potentiometer (1)
in a clockwise direction from the zero position on the
welding current scale (2). The indicator lamp for op-
eration (3) then comes on.
• To switch off the device, turn the potentiometer (1) in
a counterclockwise direction back to the zero posi-
tion on the welding current scale (2). The indicator
lamp for operation (3) then goes out.
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8. Operation

Welding preparations

• Connect the earth terminal (9) direct to the part to
be welded or to the support on which the part is
resting.
• Ensure that the earth terminal is in direct contact
with the part to be welded. You should therefore
avoid coated surfaces and/or insulated materials.
The electrode holder cable has a special clamp at
one end, which is used to secure the electrode.
• The welding safety shield must be used at all times
for welding. It protects your eyes from the radiation
emitted by the arc and nevertheless enables you to
watch the welding process.
Welding
Connect all the electrical connections for the power
supply and for the welding current circuit. Most coated
electrodes are connected to the positive pole. How-
ever, some types of electrode have to be connected to
the negative pole. Ensure that you observe the infor-
mation supplied by the manufacturer in relation to the
type of electrode and correct polarity. Fit the welding
cables (8/9) to the quick-lock couplings (5/6) accord-
ingly.
Then fasten the unsheathed end of the electrode in
the electrode holder (8) and connect the ground termi-
nal (9) to the part you wish to weld. Ensure that a good
electric contact is made.
Switch on the device and set the welding current, de-
pending on the electrode used, using the potentiometer.
Hold the safety shield in front of your face and rub the
tip of the electrode on the part you wish to weld as if
you were striking a match.
This is the best method of igniting an arc.
Check that you have the correct electrode and current
strength on a test part.
Electrode Ø (mm)
1,6
2
2,5
Important!
Do not dab the workpiece with the electrode since it could
be damaged, making it more difficult to ignite the arc.
As soon as the arc has ignited, attempt to keep it a
distance from the workpiece equivalent to the diam-
eter of the electrode. This distance should be kept as
constant as possible during the welding process. The
angle of the electrode in the direction in which you are
working should be 60° (fig. 5).
Important!
Always use tongs to remove spent electrodes and to
move parts that you have just welded. Please note that
the electrode holder (8) must always be put down so
that it is insulated after you have completed the weld-
ing work.
Do not remove the slag until the weld has cooled.
Welding current (A)
40 – 50
40 – 80
60 – 110