Hydraulic press uses PC-based controls
A new hydraulic press can produce complex parts better and less expensively than mechanical presses, but it needs sophisticated control algorithms. Best Press Corp.'s new powder-compacting press forms powders into complex-shaped molded parts with uniform density using hydraulics control technologies from Delta Computer Systems Inc.
A new hydraulic press can produce complex parts better and less expensively than mechanical presses, but it needs sophisticated control algorithms. Best Press Corp.'s new powder-compacting press forms powders into complex-shaped molded parts with uniform density using hydraulics control technologies from Delta Computer Systems Inc. (Vancouver, Wa.) and Tri-Tech Engineering (Saginaw, Mich.).
Besides a multi-axis motion controller that directs its cylinders and pistons, the new press' hydraulics are controlled by two of Delta's RMC-100 series motion controllers that communicate with a PC running Steeplechase Software's (Ann Arbor, Mich.) Visual Logic Controller software via a Profibus fieldbus network.
Best Press reports the most innovative aspect of the new press' control system is its control algorithm, which provides a smooth transition from controlling the hydraulics based on position sensing to control based on pressure sensing. Transitioning gradually from position to pressure-based control and actively modulating the hydraulics using proportional servo valves to add or decrease pressure in minute amounts through a process called 'dithering' allows Best Press to create a uniform molded product that achieves tighter tolerances than systems using discrete control.
For more information, visit www.controleng.com/freeinfo .
- Events & Awards
- Magazine Archives
- Oil & Gas Engineering
- Salary Survey
- Digital Reports
Annual Salary Survey
After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.
The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.