Resistance Welder MULTISPOT MI-90 T
Operation
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6 Operation
6.1 Preliminary works before welding
6.1.1
Preparing the sheets
When using insulating layers (e.g. spot welding primer), you must first establish an auxiliary connection
(using a vise-grip wrench, for instance) in order to establish the electrical contact
Contact faces must be ground down to the bare metal on all sides.
WARNING
Do not hurt yourself during grinding.
Grinding sheets may constitute a hazard of injuries.
Therefore:
– Be sure to deploy employees who are experienced in this type of jobs.
– Strictly observe any manuals etc. that come with the grinding tools.
Galvanised sheets should not be damaged, if possible.
Make sure the sheets are always stacked with their faces parallel to each other.
Otherwise, it will not be possible to apply clean spot welds.
6.1.2 Preparing
welding
pliers
WARNING
Unintentional startup of welder may constitute a hazard of injuries.
If the new tool is switched on during retooling, the weld current and/or unintentional
movements of the pliers may be actuated. There is a danger of pinching and crushing.
Therefore:
– Be sure to tool up first, and only then switch on the welder.
– If retooling is unavoidable during the work, be sure to switch OFF before you do anything.
NOTE
For more detailed information on preparing / tooling up the welding pliers,
see separate
operating instructions.
CAUTION
Switch off cooling first before changing electrodes !
