What are the important parameters for welding?

Three major parameters for resistance welding are electrode force, welding current, and welding time.Stable welding can be achieved regardless of the skill of operators by setting appropriate welding parameters.
In the case of spot welding and seam welding, in addition to the three major parameters, electrode tips become essential.This is because the current density of the welded area is increased based on the reduced contact area between electrodes and the object to be welded.This electrode shape factor is sometimes referenced as the fourth major parameter.
In the case of projection welding, in addition to the three major parameters, the parallelism of electrodes and the projection shapes become essential.This is because the projections increase the current density for welding.
The welding quality will vary based on the combinations of the above parameters.