With its L7 All Electric Palletizer, Top Tier has created a
hybrid
servo system by keeping standard AC motors, from SEW Eurodrive, but replacing Variable Frequency Drives with B&R Industrial Automation ACOPOS multi drives in what B&R calls a
motion subsystem.
Why? For the reason that ACOPOS multi pushes are far better able to operate a normal AC motor in a enhanced sealed-loop function compared to the VFDs employed earlier. This movement subsystem translates into significantly greater positioning accuracy and increased throughput, and and this is what allows Best Tier to offer whatever they phone Perfect Pattern technologies. There might be approximately 25 or 30 pushes per palletizing program, and they all fit properly in a single user interface. They generate the SEW Eurodrive AC motors which can be out down the palletizing program anywhere they may be required for actuation of just one sort or any other. Along with sticking with standard AC motors within their manages design, Best Level can also be staying with a Rockwell Related Subsidized Content Movie integrated unit manage: PLC, action management, field bus, I/O and user user interface lessen deployment risk in device design and increase functionality PLC, which provides all equipment common sense. Involving this PLC and also the B&R movements subsystem, interaction is maintained above Ethernet IP. The B And R pushes, like most regular VFDs, are in essence electronic digital slaves for the main PLC code. By keeping the Rockwell PLC in the picture, Top Tier acknowledges the simple fact that so many end users are so accustomed to Rockwell architecture and Rockwell PLC code. This way, Leading Level know to the consumers,
You want Rockwell rule? You received it. You now get the added benefit of Perfect Pattern positioning, but because we'
ve replaced the VFDs with ACOPOS multi drives. And don'
t stress, your staff who function and sustain this palletize do not need to possess any expertise in B&R code.
Within the B&R movements subsystem, interaction in between the subsystem'
s Processor as well as the B&R drives is carried by way of a Power Link communication protocol. Top Tier President Steve Heston points out that among the things he likes about Power Link is that it'
s deterministic. Other communications protocols out there that are not deterministic allow latencies to occur, and latencies are bad because they can complicate the ability of the system to respond predictably.
It was placing handle which we were soon after,
says Heston.
In a palletizer you may have numerous simultaneous motions where huge items are shifting quick so you put on'
t want accidents. So we switched to a system that allows us to operate the machine in a closed loop control, more like a CNC machine. They all operate in a positioning feedback mode, even though we kept the SEW Euro drive motors. So, for our purposes, they perform just like servos. Other substantial benefits that Top Tier now enjoys, claims Heston, are energy price savings, simplified maintenance, along with a more compact control cupboard.
The B&R hard disks let regenerative potential to be utilized by any push from the method,
says Heston. Regenerative energy seized as a byproduct of hoist cutting down, for example, provides increased vitality performance.