Servomotor technology contributes to productivity

Servo drive control: Improved computing power advances servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) enable updates to multiple servo control loops while handling machine control logic.

01/18/2013


Recent advances in servomotor technology also significantly reduce the cost of ownership. Beckhoff’s OCT (One Cable Technology) on AM8000 series servo motors combines the encoder signals with the power wires to eliminate one of the two cables between theVast improvement in computing power is perhaps the most significant contribution to servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) make it possible to update multiple servo control loops while still handling machine control logic. Take the case of robotic mechanisms using multiple servo motors; only the path of the end effectors’ motion needs to be programmed instead of dealing with the motion of each individual motor. This abstraction permits faster development and more creative robotic implementations. The open architecture of these PC-based controllers paired with intelligent software offers standardized programming tools. These tools facilitate easier implementation of control routines and provide advanced preprogrammed routines though software libraries.

Networking advances make it possible for servomotors to better coordinate their activities. For example, the EtherCAT network with its distributed clock technology provides the tight control required by demanding robotic and CNC applications. EtherCAT enables setup and testing to all the components in a system through one standard connection to eliminate the need to plug into each drive separately.

Recent advances in servomotor technology also significantly reduce the cost of ownership. Servo motors that use one cable technology (OCT) combines the encoder signals with the power wires to eliminate one of the two cables between the motor and drive. Cables represent about 10% of the hardware cost in a typical installation. The potential savings from OCT increase when the installation and other indirect costs are considered.

Vast improvement in computing power is perhaps the most significant contribution to servo motor technology. Fast processors in PC-based controllers (especially multi-core PCs) make it possible to update multiple servo control loops while still handling ma

A handful of motor advancements put together have increased the motor’s peak torque and continuous torque output. The peak torque is the amount of torque the motor can provide for short periods of time; the continuous torque is the amount of torque the motor can output forever. The continuous torque rating also reflects the amount of torque the motor can provide when the total torque profile is leveraged over time, commonly referred to as the motor’s duty cycle. More torque in a smaller package is a significant cost reduction in itself, but smaller servomotors can be used when you consider the torque ratio.

In a typical application, the torque needed to accelerate a mechanical system is orders of magnitude greater than the torque needed to overcome friction. This generally results in a low, continuous torque requirement since the motor isn’t constantly accelerating. Servomotors have a peak-to-continuous torque ratio in the neighborhood of three, while others can approach seven.

- Gary Kirckof is application engineer manager, Beckhoff Automation. Edited by Mark T. Hoske, content manager, CFE Media, Control Engineering and Plant Engineering, mhoske(at)cfemedia.com.

www.beckhoffautomation.com/drivetechnology 

ONLINE

At www.controleng.com search Beckhoff Automation.



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
Each year, a panel of Control Engineering editors and industry expert judges select the System Integrator of the Year Award winners.
Control Engineering Leaders Under 40 identifies and gives recognition to young engineers who...
Learn more about methods used to ensure that the integration between the safety system and the process control...
Adding industrial toughness and reliability to Ethernet eGuide
Technological advances like multiple-in-multiple-out (MIMO) transmitting and receiving
Big plans for small nuclear reactors: Simpler, safer control designs; Smarter manufacturing; Industrial cloud; Mobile HMI; Controls convergence
Virtualization advice: 4 ways splitting servers can help manufacturing; Efficient motion controls; Fill the brain drain; Learn from the HART Plant of the Year
Two sides to process safety: Combining human and technical factors in your program; Preparing HMI graphics for migrations; Mechatronics and safety; Engineers' Choice Awards
The Ask Control Engineering blog covers all aspects of automation, including motors, drives, sensors, motion control, machine control, and embedded systems.
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
News and comments from Control Engineering process industries editor, Peter Welander.
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
This is a blog from the trenches – written by engineers who are implementing and upgrading control systems every day across every industry.
Anthony Baker is a fictitious aggregation of experts from Callisto Integration, providing manufacturing consulting and systems integration.
Integrator Guide

Integrator Guide

Search the online Automation Integrator Guide
 

Create New Listing

Visit the System Integrators page to view past winners of Control Engineering's System Integrator of the Year Award and learn how to enter the competition. You will also find more information on system integrators and Control System Integrators Association.

Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.