Well, you asked for it. The 1998 edition of one of the world's largest manufacturing and technology shows is tanned, rested, and ready to go seamless.Evolving as a result of recent feedback from visitors and exhibitors requesting an even more streamlined and workable event, this year's National Industrial Automation Show (NIAS), and the three other shows that make up National Manufacturin...
Despite the temptation, size alone is not the right descriptor for ac "microdrives"—those ultracompact variable-frequency drives (VFDs) that sprouted during the first-half of the 1990s. For quite a while, it seemed, each new model would be even more miniature than the one announced just a month or so earlier.
New Ulm, Minn.—MaxPlus 12-in. brushless servo motor delivers up to 90 hp or up to 300 lb-ft of continuous torque for high-production, high-torque applications. It is intended for very large machinery applications where the size and weight of conventional motors have made automation prohibitive.
Andover, Hants, U.K. —Unimotor line of brushless ac servo motors consists of three-phase, six- or eight-pole, permanently excited synchronous motors exhibiting a sinusoidal back-EMF characteristic. They've been designed to provide high torque with either low- or high-rotor inertia and minimal cogging torque.
What functionality/features are today's programmable logic controller (PLC) users seeking? How are they applying PLCs? Is any other technology, such as personal computers, taking away market share from PLCs? Control Engineering wanted to know, so we asked a random sampling of 1,500 readers to participate in a survey about today's PLC.
Operating Systems Hardware Platform Motion Control Open Device Level Networks User Interface Control Software Manufacturing Information System (MIS) Level Networks Application Programming Interfaces (API) It should be clear to the controls community that GMPTG is not trying to dictate the development of OMAC by specifying technical details for every aspect of OMAC. GMPTG is not going to lead the development of any new technology but will ride the technology wave! However, GMPTG engineers are not oblivious to the technical issues associated with OMAC systems. In this section, several OMAC technical areas will be examined.
PID loops control a majority of the automated processes in industrial facilities. The proportional-integral-derivative (PID) algorithm is both simple and reliable, and has been applied to hundreds of thousands of control loops over the last 50 years.However, not all industrial processes can be controlled with PID loops.
The southern tip of California's Marin county is separated from the city of San Francisco by the most famous mile-long strip of steel and concrete in the world. Yet, within a 10-minute walk of the Golden Gate's Marin terminus begins a county-wide network of California Wildlife Service signs warning against mountain lion attacks.
Chaos theory is now being studied aggressively. Simple practical control of the double pendulum is extremely promising for many control applications.
Motion control, as other technologies, has its fair share of special terms. Not all of them are rigorously defined; some require blending to suit the specific audience. Here's a sampling of some well-known and not-so-well-known terms.A motion control system typically consists of a controller to process motion algorithms and signals; an amplifier to boost signals to a level needed to p...