15
ENGLISH
CARE AND MAINTENANCE
Warning! Before opening up the welding machine, switch it off,
unplug it from the mains and put up a warning sign to stop
anybody inadvertently switching it back on again. If necessary,
discharge the electrolytic capacitors.
In order to keep your welding machine operational for years to come, you
should observe the following points:
- Carry out safety inspections at the stipulated intervals (see the section
headed “Safety rules”)
- Depending on the machine location, but no less often than twice a
year, remove the side panels from the machine and blow the inside of
the machine clean with dry, reduced-blow compressed air. Do not aim
air-jets at electronic components from too close a range.
- If a lot of dust has accumulated, clean the cooling-air ducts.
On water-cooled welding torches:
- Check that the torch connections are watertight
- Check the volume and quality of the coolant water (only top up with
clean coolant water)
- Keep an eye on the volume of coolant returning to the coolant
reservoir
SPOT WELDING
N.B.! For spot-welding, it is necessary to fit a spot-welding attachment
onto the torch first.
- Set the welding parameters
- Select the desired spot-welding time on the spot-welding time dial
- Shift the operating-mode selector switch to the spot-welding
position
- Make sure that the torch is correctly tooled up (i.e. with spot-welding
attachment) and place it onto the metal sheet
- Press and release the torch trigger
- Automatic spot-welding sequence takes place
N.B.! To interrupt the spot-welding sequence, press and release the torch
trigger again.
The settings made are correct when the top of the spot-weld is slightly
convex and it can be seen on the underside of the spot-welded parts that
they have been welded through. Also, make sure that the parts to be spot-
welded are resting snugly against one another, and that any contamination
from e.g. paint and rust is removed first.
MIG/MAG WELDING
Caution! Before starting up for the first time, read the sections
headed "Safety rules" and "Starting to use the power source".
N.B.! Manufacturing tolerances and alloy tolerances of welding wires
may necessitate corrections to the welding voltage and/or wirefeed
speed. This is also true when other shielding-gas mixtures are used, and
in the event of mains voltage fluctuations.
MANUAL MODE
One of the basic preconditions for obtaining an optimum welding result
with the MIG/MAG welding process is that the operating point has been
determined correctly. This is basically effected by selecting mutually
compatible welding voltages (step switch , ) and wirefeed speeds
(wirefeed-speed dial
).
- Plug the earthing cable into welding-current socket 1 / 2 / 3 , and
latch it in place
- Attach the other end of the earthing cable to the workpiece
- Plug the machine into the mains
- Shift the mains switch to the “I” position
- Shift the welding-program selector switch to the “Manual Mode”
position (Manual)
- Set the welding voltage with the coarse and fine step switches
- Set the wirefeed speed on the wirefeed-speed dial
- Shift the operating mode selector switch into the required position
- Open the gas-cylinder valve
- Set the gas flow-rate
- Press the torch trigger and start welding
PROGRAM MODE
In Program Mode - both in stand-by and during welding - the digital
displays show various parameters in the form of command values and
actual values. These greatly facilitate the settings procedure.
The following section describes the settings procedure for a given sheet
thickness. If other data - e.g. welding voltage, welding current or wirefeed
speed - are specified for this welding task, then the order in which the
settings are made must be altered in accordance with the procedure
given below.
- Plug the machine into the mains
- Shift the mains switch
to the “I” position
- Shift the wire-diameter selector switch
to the applicable value
- Shift the digital-indicator selector switch
to the sheet-thickness
position
- Correct the coarse
and/or fine step switch(es) up or down until
the desired sheet thickness appears on the ‘m/min - mm - A’ digital
indic.
- Shift the digital-indicator selector switch to the welding-current
position - the ‘m/min - mm - A’ digital indicator then shows the pro-
grammed welding current
- Shift the digital-indicator selector switch
to the wirefeed speed
position - the ‘m/min - mm - A’ digital indicator then shows the pro-
grammed wirefeed speed
- If required, correct the programmed wirefeed speed with the wirefeed
speed dial
(% scale, correction facility of +/- 30%)
- At the same time, the ‘V - inductance’ digital indicator
shows the
optimum welding-current socket 1 / 2 / 3 for this operating point, for a
period of 2 sec.
- Plug the earthing cable into welding-current socket 1 / 2 / 3
(as
shown on the ‘V - inductance’ digital indicator
), and latch it in place
- Attach the other end of the earthing cable to the workpiece
- Shift the operating mode selector switch
into the required position
- Open the gas-cylinder valve
- Set the gas flow-rate
- Press the torch trigger and start welding
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