Articles and News

A Variable Frequency Drive regulates the speed of a 3-phase AC electric motor by controlling the frequency and voltage of the power it delivers to the motor. Today, these devices are becoming prevalent in a wide range of applications throughout the industry, from motion control applications to ventilation systems and many others.

Strobe lights (or stroboscopes) have been used to study the behavior of rotating machinery, oscillating vibration of components or structures and for balancing for a number of years. Functionally, strobe lights can be very different.

The SSW5/USB converter cable is for connection of a Simatic S5 CPU to a PC with a USB interface. For PCs that do not have a serial interface, the SSW5/USB cable can connect to the PLC via a virtual COM port.

The fundamental concepts of servo motion control have not changed significantly in the last 50 years. The basic reasons for using servo systems in contrast to open loop systems include the need to improve transient response times, reduce the steady state errors and reduce the sensitivity to load parameters.

This paper suggests several mechanical, electrical, and software ideas that will enable conveyor designers to optimize conveyor reliability and "maintainability" without the need for large investments in equipment and design time. It introduces the concept of internally powered conveyor belt drives and offers generally applicable belt drive design software.