New variant of Acopos P3 servo drive takes spindles to top speeds

B&R's advanced closed-loop control functions minimize heat and noise generation

The new Acopos P3 servo drive variant is ideally suited for machines with fast rotating axes
The new Acopos P3 servo drive variant is ideally suited for machines with fast rotating axes

A new variant of B&R’s Acopos P3 servo drive is now available with no output frequency limitation. In many applications, that makes it possible to achieve motor speeds in excess of 100,000 rpm. The new Acopos P3 is especially suited for axes that rotate at very high speeds, like the spindles of CNC milling machines.

That means it can now be used for demanding machine tool applications for processing metal, stone, glass, or wood. With the exceptional control quality and extremely fast cycle times of the Acopos P3 now available for these high-speed applications, the machines can deliver more precise, reliable results. 

Acopos P3 spindle motors at top speed

On the standard Acopos P3, the device’s electrical output frequency is monitored. If it sustains a frequency above the limit value of 598 Hz for more than half a second, the movement is stopped, and an error is triggered. On the new variant of the servo drive, the electrical output frequency is not monitored. As a result, it is subject to the dual-use export restrictions per Regulation (EC) No. 428/2009 of the European Community.

Cool and quiet operations

Acopos P3 servo drives are suitable for operating all types of spindle motors. B&R now offers a complete solution of hardware and software for CNC machines and robot arms where high-speed permanent magnet synchronous spindle motors are used with the new variant.

Both open-loop control and closed-loop control with a cycle time of 50 µs are possible. B&R’s advanced closed-loop control functions help minimize the generation of heat and noise.


The Covid-19 pandemic led to the country-wide lockdown on 25 March 2020. It will be two years tomorrow as I write this. What have we learned in this time? Maybe the meaning of resilience since small companies like us have had to rely on our resources and the forbearance of our employees as we have struggled to produce our trade platforms.

The print and packaging industries have been fortunate, although the commercial printing industry is still to recover. We have learned more about the digital transformation that affects commercial printing and packaging. Ultimately digital will help print grow in a country where we are still far behind in our paper and print consumption and where digital is a leapfrog technology that will only increase the demand for print in the foreseeable future.

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As the economy approaches real growth with unevenness and shortages a given, we are looking forward to the PrintPack India exhibition in Greater Noida. We are again appointed to produce the Show Daily on all five days of the show from 26 to 30 May 2022.

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