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 .
Case Study Database
Get more exposure for your case study by uploading it to the Plant 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.
Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.