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Article | September 30, 2002
Triangle takes cartoner to a new platform
A new intermittent cartoner from Triangle has a smaller footprint and higher speeds enabled by integrated, digital servo motion control.
When a customer asked Triangle Package Machinery Co. (Chicago IL) for a bag-in-box cartoner that could run 90 to 100 cartons/min the machine builder knew it needed to create an entirely new machine. “They were looking for a cartoner that didn’t exist in the marketplace that would match the output of current-generation continuous-motion form/fill/seal machinery” says Charles Muskat Triangle’s cartoner group sales manager.Normally the application would be solved with a large continuous-motion cartoner. However those machines which Muskat says operate at 150 to 250 cartons/min were overkill for this application in terms of price and floorspace. And traditional intermittent-motion cartoners top out at 50 to 60 cartons/min.To fill this gap Triangle created its ProLine FC cartoner which has a completely different way of advancing cartons and loading bags into the cartons. “We’ve broken through the traditional speed barrier with some unique methods of carton advancement and bag loading” says Muskat. The new design allows the machine to reach the desired 90-cartons/min target while keeping to a compact 5’x10’ footprint. This new design was made possible in large part by digital servo motion control.The new ProLine FC has no mechanical drive train. Instead six Allen-Bradley servo drives and motors from Rockwell Automation (Milwaukee WI) are electronically synchronized via a SERCOS digital motion network in the machine.“It translates into a smaller and simpler mechanical assembly because you don’t have a bunch of drive shafts and gearboxes” says Steve Bergholt Triangle’s chief engineer. “There is no main drive shaft in this machine.” The SERCOS network “makes wiring simple and troubleshooting easier” Bergholt adds. Such a machine design built ground up around servos is increasingly being referred to as third-generation servo-based packaging machinery. The machine is controlled by an Allen-Bradley ControlLogix™ integrated controller that handles both machine logic and motion control functions. That eliminates the need to buy install program and maintain a separate motion controller inside the machine. The machine also uses a DeviceNet fieldbus that allows the controller to communicate to other devices on the machine such as nonservo AC drives that are also from Rockwell. “The fieldbus allows us to gather information from the drive to give us more accurate control” says Bergholt. “It also simplifies wiring and adds diagnostics capability to the machine.”
Ethernet comes standard on the new machine allowing it to interface to a variety of customer networks. The new control platform also opens the door to future capabilities. “It’s relatively easy to control all three machines in a line [scale bagger and cartoner] through one operator interface” says Bergholt. “This is where our use of ControlLogix and Ethernet is taking us.” —DN/ES
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