Product Details Supplier Info More products

A servo drive from Control Techniques has been used on a total-body-irradiation (TBI) table at the Institute of Oncology Ljubljana in Slovenia.

The system was designed around Control Techniques’ Digitax ST Plus servo drive, providing accuracy and reliability without the need for an additional PLC.

Signals are evaluated within the processor in the Digitax ST servo drive, with actual speed being constantly compared with the speed of the servo-motor.

As a further safety backup, an IFM counter monitors the table speed and disconnects the radiation source if the speed drops below a selected minimum.

The client specified very quiet operation and a simple operator interface.

The Digitax ST Plus features a full functionality motion controller that is configured using Control Techniques’ programming tool, CTSoft, with the drive’s advanced motion features being configured in a flexible IEC6113-3 software-development environment using PLC-open motion function blocks within Control Techniques’ SyPT software.

It was possible to provide all of the programming required within the drive itself, negating/eliminating the need for an additional PLC.

The system incorporates three feedback loops; a closed position loop, a closed speed-control loop and an actual speed-control loop using the additional security counter.

The medical staff determine all of the required parameters – starting point, length of movement and speed – using the touch-screen control panel In addition to automatic control, staff can override speed control using the remote screen and, if treatment is interrupted at point, it can be resumed precisely from the point at which it was stopped.

Speed tolerance is better than the specified 0.2 per cent at speeds from 30mm/min up to the treatment maximum speed of 500mm/min.

Digitax ST is a range of servo-drives with high connectivity, feedback options, intelligence and functionality.

Four product variants make up the range at launch: Base, Indexer, EZ Motion and Digitax ST Plus – the latter being chosen by the Institute of Oncology for its power and programmability.

Control Techniques

Control Techniques, an Emerson Industrial Automation company, is a world leader in the design, production and marketing of electronic variable speed drives for the control of electric motors. Our strategy is to concentrate on delivering drives and servo products that enhance the productivity of our customers’ machines and processes.

We operate through a global network of drive and application centres that both distribute product and add value by building our drive products into custom designed systems and by offering the highest levels of customer service.

Our Control Techniques drive centres also provide us with invaluable feedback and market intelligence so that we can further improve our products and service. This customer focused strategy will enable us to continue to grow profitably.

Our competitive edge is based on our unique focus on drives, our strength in research and development, our investment low-cost manufacturing and an effective worldwide marketing strategy.

Emerson Industrial Automation, a business of Emerson, is a global technology provider that enables productivity, efficiency and quality gains for customers across a spectrum of industries. Our products include alternators, electric motors and drives, electrical distribution devices and mechanical power transmission, fluid automation and ultrasonic joining solutions. Visit our website for more details.

View full profile