Fronius VST 247, Operating Instructions Manual

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Fig.18 Settings on the control panel
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.
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.