An MFDC or AC weld gun is just a working tool that does what it is told to do by one or more controls. The robot puts it in place to make the weld and the resistance welding control makes all of the decisions for the welding schedule. The gun is not adaptive. The robot positioning is not adaptive but can be repositioned. The weld control in some cases can be adaptive.
SERVO ACTUATED WELD GUN
The amount of adaptability and diversity depends upon the control. A discussion of adaptive controls is beyond the scope of this blog. One should contact your local supplier and control manufacturer to expand your knowledge on adaptive controls.
RWMA could be a source of equipment manufacturers with knowledge in this area.
Reference: RWMA - Resistance Welding Manufacturing Alliance