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Faster, smaller, ACOPOS

P3 mal zwei frei

More than ever before, machine and system manufacturers are being confronted with demands for increased productivity and availability. At the same time, pressure is constantly building to reduce the manufacturing costs for production machines. The new servo drive generation from B&R was designed to meet these challenges. Offering a high degree of integration and an extremely fast sampling time of 50 µs, the ACOPOS P3 is opening up entirely new opportunities for virtual sensing technology. Complex production processes require complex machines – and therefore sophisticated hardware and software. The control cabinets for advanced machines and systems take up additional space in production halls, while their procurement, cabling and cooling can quickly drive up costs. Machine and system manufacturers therefore do all they can to reduce control cabinet space to a minimum. Reducing the space that hardware takes up in the control cabinet, the footprint of the devices located there, is crucial.

Faster: 50 µs sampling time

For highly dynamic and precise processes like those in the printing and packaging industries, extremely fast movements must be controlled with absolute precision. One of the factors that limits speed is the sampling time of the servo drive. The cycle time for current, speed and position control on the ACOPOS P3 is 50 µs. "This sampling time allows us to implement new closed-loop control processes that can be summed up under the term 'virtual sensor technology'," explains Holzleitner. The necessary bandwidth and precision on the network is provided by POWERLINK.

The trend in machine manufacturing is towards saving energy, which puts a premium on lightweight construction. Engineers attempt to reduce masses that require moving to a minimum in order to keep the amount of energy required as low as possible. This in turn makes the machines less rigid and more elastic. Virtual sensors make it possible to control these elastic systems without having to use additional position measurement systems at the process intervention point. The ability to use virtual position encoders eliminates the need for a position encoder, cable and evaluation unit in the servo drive while increasing availability at the same time. "There are also further additions to the standard controller cascade for ACOPOS P3 servo drives," explains Holzleitner. This includes repetitive control, for example, which makes it possible to predict and compensate for lag errors. The result? More precise control, improved performance and increased product quality.

ACOPOS P3 with motors
The compact ACOPOS P3 servo drive can control three axes at once.

B&R will be presenting the ACOPOS P3 at the SPS/IPC/Drives trade fair in Nuremberg in November 2014. Versions with 1, 2 and 3 axes will be available, covering a power spectrum ranging from 0.5 to 24 kW. Over 1,000 ACOPOS P3 drives can be controlled in a single system. The ACOPOS P3 is compatible with all previous servo drives from B&R and can be connected together with them in a network.


Holzleitner Alois #1

"The groundbreaking ACOPOS P3 is intuitive to operate and offers better performance, more safety functions and a higher level of availability in the smallest possible space." Alois Holzleitner, Technical Manager - Motion, B&R

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