The end of the 20th century amalgameted WTC's final two company mergers - Robotron and Medar welding control divisions. In the final decade of that century, an abundance of technical developments introduced integration of resistance welding controls into the back planes of PLC (Programmable Logic Controllers) and robot controllers.

1991 - Integration of Welding Controls into Robots and PLCs
1999 - Weltronic Technitron Corporation acquires Robotron welding controls
1999 - Weltronic Technitron Corporation acquires Medar welding controls