Elektron MULTISPOT MI-100control - Page 56

Resistance welder MULTISPOT MI-100control
Operation
56
Adjusting the contact force
NOTE!
Be sure to set the correct contact force with respect to the current welding / OEM
program selected – because:
 If the contact force of the electrodes is too high, the electrical resistance will be too
weak which, in turn, will affect the welding job.
 If the contact force is too weak, the welding spots may erode and leave holes in the
sheets.
Fig. 72: Contact force ≤ 240 daN
CAUTION!
Danger to property
!
When using the electrode arm configuration shown to the left, 12-mm electrodes will
slightly bend if the contact force is set higher than 240 daN (540 lb f).
Therefore:
 Ask yourself, whether the job at hand could be handled just as well with a different
configuration.
 When you have to use the configuration as shown here, make sure the contact
force does not exceed 240 daN (540 lb f) / 4.6 bar (67 Psi).
Distances between welding spots
Fig. 73: „Distances should not be too short.”
 Don’t keep the distances between welding spots too
short (25 mm approx.). Otherwise, the weld current
might affect the spots (that have already been applied)
a second time.
Lifetimes of electrode caps
NOTE!
The perfectly sound condition of the caps is essential for good welding results.
 Electrode caps must be milled (or replaced) after 50 welding jobs, especially when
working with high strength and / or galvanised steel (  see “6.1.2”).