A recent upgrade that we did on an extruder line.
These ABB drives work in unison to control slinkys, a vacuum chamber, gas injection system and an extruder exit.
The drives each have a trim pot controlled by a master pot, so all the speeds can be adjusted together at the same ratio.
The torque and speed feedbacks from the drives are fed back to a scada system which was designed and installed by Oracle based on a Siemens wincc platform.