An energy system for applying energy to a workpiece includes a first energy application device, mounted such that the first energy application device has a fixed position relative to the workpiece during energy application； a second energy application device, mounted such that the second energy application device has a moveable position relative to the workpiece to apply energy to the workpiece at a point moving progressively across the workpiece, wherein one of the first and second energy application devices is an anvil and the other of the first and second energy application devices is an ultrasonic bonder； and a controller for regulating the application of energy to the workpiece, wherein the controller is configured to adjust progressively across the workpiece one or more of bonder vibration amplitude versus position on the workpiece, bonder pressure versus position on the workpiece, and horn travel velocity versus position on the workpiece.
