FMS Force Measuring Systems AG
Dual range load cells for Emerson & Renwick
Steve Dicken from Emerson & Renwick contacted FMS to discuss their tension measurement and control requirements for a new customer project from the United Kingdom. Emerson & Renwick’s mission was to design and manufacture a flexible, multifunctional R&D vacuum coater. This very large machine was intended to be used for the roll to roll production of flexible electronics and energy storage on ultra-thin substrates.
A team of engineers worked out the requirements that needed to be fulfilled. An essential point was to find built-in load cells that offer a broad measurement range, are able to handle a wide spectrum of substrates from 75μm down to < 5μm. Furthermore, the confined space available within the process environment meant both set-up and calibration had to be a very simple task. In addition, the service life and accuracy of the force sensor had to be maximised at all times, especially in a vacuum environment, where normal materials and equipment are tested to their limits and beyond. After consulting with FMS their requirements, the conclusion was that both dual range load cells suitable for use within vacuum environments were the answer and the LMGZD-series dual range load cell was chosen. This was also coupled with the EMGZ310.ComACT amplifier which offers a Bluetooth connection and dedicated Android or iOS application for interfacing, monitoring and calibration. The application has further evolved since this project with Emerson & Renwick and now offers data recording to the smart device, a feature which is useful for “on-the-fly” logging and analysis.
Project procedureFMS products offer unique solutions which is also backed up by hands on support from their technical team and a thorough understanding of engineering situations which push the boundaries of technology and their further ability to find solutions to those situations.
“The broad measurement range is something we already had experience with in the past. And with the support and technical knowledge of FMS, we knew that if any issues arouse, they are very hands on to deal with it,” recalls Steve Dicken the lead mechanical design engineer at Emerson & Renwick. FMS Force Measuring Systems have been manufacturing force sensors for more than 25 years in Oberglatt, Switzerland. Their innovations have created a second to none portfolio which enjoys one of the best reputations in regards to quality and durability. “Both enterprises are connected by a close partnership of over eight years. FMS was first introduced by a colleague, who had also had a long history using FMS products. I already liked the technology and flexibility of FMS back then,” adds Steve Dicken.
He continues to talk about the first set-up, “Where a lot of our suppliers charge us for a day’s engineering work to be on site for support the FMS representative was here to assist and make sure everything went smoothly and at no charge to us. I couldn’t ask for more really. After installation of the optimally calculated solution, we could immediately see the great results from low down tensions. That was a big surprise. We are used to the fact that load cells cannot measure from absolute zero up with accuracy until they are at a certain percentage of the nominal force, but FMS solutions can.”
Project closureThe end customer is 100% satisfied with their flexible, multifunctional R&D vacuum coater. Calibration and maintenance of the machine can be carried out easily and downtimes have been reduced to a minimum. The customer reports a powerful and reliable feedback and functionality of the machine. And by implementing the latest tension measurement technology, they are equipped to support innovation and development of new products.