90PUNTPI11 – 90PUNTPI12 – 90PUNTPI13 – 90PUNTPI21 – 90PUNTPI22 – 90PUNTPI23
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Current
Welding current influences the strength of the spot as does weld time but the influence is much stronger.
3.5
CHECKING SPOT QUALITY
There are different ways to check the quality of a welding spot. The best way, for the strength test, is the separation test of the
welded parts. This test entails gripping the welded sample pieces in a clamp and opening them with a scalpel. Strength is good if,
after the sheets have been separated, there is a hole on one sheet and the melted core on the other sheet.
3.6
OPERATING GUIDE
Prior to welding:
-
Turn the welding machine on with the main switch (6)
-
Check that the “set value” display turns on and that all the signalling lights are tested.
-
Check on the gauge for compressed air.
-
Check that the set welding parameters are ideal for the piece you are welding and for electrode aperture (squeeze time).
-
Wear individual protection gear (gloves, glasses, aprons, etc.).
Starting:
•
Gun
:
Press the red push button to bring the electrodes to the point to be welded.
Once squeeze time has elapsed, current will start passing between the sheets, determining the welding
spot. Press black push button in order to clamp work piece without welding, if clamping position is
correct, it is possible to complete the weld sequence pressing red button. If an extra opening is needed to
reach difficult welding point, use the side yellow push button to achieve it.
•
Spotter
:
Use the gun’s lever switch to spot weld.
Stopping the cycle and emergency stopping:
-
The cycle can be stopped at any time, when you take your foot off the pedal.
-
To stop in an emergency, turn the main switch off and discharge the pneumatic circuit through the dump valve.
3.6.1
OPERATING GUIDE FOR AUTOBODY REPAIR WORKS
Double side gun electrode adjustment
•
Remove the compressed air supply
•
Close by hands the arms and adjust the electrodes so that they are perfectly aligned:
a wrong aligning would reduce the
spot strength.
•
Sharpen the electrodes if necessary.
