Compact servos provide top performance
An
Unimatic Engineers product story
Edited by the Engineeringtalk editorial team
Sep 19, 2003
The PC800 and PCE800 series are the latest all-digital brushless servo drives from Pacific Scientific, providing comprehensive servo capabilities in a package some 40% smaller than their predecessors.
The PC800 and PCE800 series are the latest generation of all-digital brushless servo drives from Pacific Scientific, providing comprehensive servo capabilities in a package some 40% smaller than their predecessors.
Ideal for demanding applications where space is at a premium, the new servos provide features such as class leading low speed performance, position accuracy as low as 5 arc seconds, and a 400Hz velocity-loop bandwidth that is the highest in the industry.
Like all Pacific Scientific drives, the PC/PCE800 series can accept either step and direction or analogue commands.
Motion profiling is standard - the internal profile generator allows pre-set index moves.
Smooth low speed performance is assured through Pacific Scientific's patented 24bit DRDC (digital resolver to digital conversion) algorithm.
Key models in the range also feature a Sercos interface, delivering enhanced digital two-way control and drive communication capabilities.
Using the latest Sercos816 ASIC, the servos offer network communication rates up to 16MHz for high performance, distributed motion control.
The Sercos interface complies fully with IEC/EN61491 - the industry's only open control standard - assuring compatibility with all other devices supporting Sercos.
As well as offering high-speed communications for improved performance, the Sercos interface reduces installation costs by replacing the conventional mass of wiring with a single optical cable, and provides an inherently more reliable solution that is completely immune to electrical noise.
Designed for operation from a 120 or 240V AC line, the PC800 series offers output powers ranging from 500 to 1500W, whereas the PCE800 drives operate from a 380-480V AC line and offer output powers from 1500 to 5000W.
With an optional fan kit, continuous currents can be increased by 50%.
The inclusion of advanced antiresonance filters makes the servos ideal for use in complex mechanical systems.
All servos in the range build in PLC-like functionality, and offer a variety of digital and analogue I/O for maximum application flexibility.
In addition, all models offer both resolver feedback and Hall/encoder feedback inputs.
To complete the package, Unimatic offers two ranges of servomotors carefully matched to the PC/PCE800 series servo drives.
Coupling the drives with the Pacific Scientific PMA series and S series brushless servomotors typically results in higher performance and efficiency, delivery more continuous usable torque.
For those with limited exposure to the benefits of Sercos, Unimatic's experience and expertise over many years with Sercos interfaces is at their disposal.
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