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MACHINE BUILDING, FRAMEWORKS & SAFETY FEATURE CKAGING WASTE RECYCLING
to maintain optimal performance. Some retailers addressed the increased volume by compacting PET bottles and cans. However, for those using two Reverse Vending Machines (RVMs) side by side, TOMRA’s Z-conveyor system became essential. The Z-conveyor transports uncompressed
beverage containers, like PET bottles and cans, into large storage bags. Initially designed to manage smaller volumes (primarily PET bottles), the Z-conveyor faced challenges with the expanded deposit system which introduced a much higher volume of cans. The original system was not equipped to handle the surge efficiently, risking potential bottlenecks and operational delays. TOMRA therefore needed to adapt its
Z-conveyor for handling increased volumes of both PET bottles and cans seamlessly, to allow retailers to cope with the expanded deposit system without disruption. The company consulted Duursma, a Dutch technical wholesaler known for its expertise in variable speed drive technology and industry services and a long-standing supplier of components for TOMRA’s machines. Duursma then sought the assistance of partner Nidec Drives, having collaborated with the company for over 23 years to solve complex technical issues.
DRIVE SOLUTIONS To meet TOMRA’s needs, the original 1-phase motor of the Z-conveyor was replaced with a 3-phase motor combined with the Control Techniques Commander S Micro AC variable speed drive. The Commander S variable speed drive offers power ratings from 0.18 to 4 kW and a maximum output frequency of 300 Hz, which enabled smooth motor control and made it possible to switch the conveyor motors on and off in a controlled manner, preventing high starting currents and overheating. This solution allowed for a direct,
1:1 replacement of the old motor without requiring the entire machine to be returned to the manufacturer. The Commander S variable speed drive’s offline programming capability meant that technicians could arrive on-site with a pre-set configuration, simplifying installation. Once the new motor was mounted, only four parameters needed adjustment to get it up and running, offering TOMRA an efficient and reliable solution for the conveyor upgrade. TOMRA’s selection of the Commander S
variable speed drive wasn’t just about functionality – it aligned with the company’s commitment to sustainability and durability. The Commander S features a sleek, curved design that minimises its carbon footprint while offering easy access to terminal blocks. Its click-on/click-off DIN rail mounting system ensures a straightforward installation process. One standout feature of the Commander S
is its status as the first frequency inverter to come with standard wireless communication via NFC (Near Field Communication). Unlike Bluetooth or WiFi, NFC provides faster, more stable and energy-efficient connections within a short range (10cm), ensuring secure communication. NFC is already widely used in smartphones for tasks like payments, making it both a reliable and proven technology. Setting the Commander S apart, the Marshal
app allows technicians to wirelessly commission, monitor and diagnose the drive. The app simplifies tasks such as copying and transferring settings between controllers, particularly beneficial when retrofitting a large number of machines. Any TOMRA mechanic, regardless of electrical expertise, can easily install and program the Commander S with the help of the app. This combination of durability, innovation, and user-friendly features made the Commander S an ideal solution for TOMRA’s operational needs.
A COLLABORATION Across the Netherlands, the process of replacing the variable speed drives for TOMRA’s Z- conveyors with new frequency-controlled 3-phase motors is well underway. Reflecting on the collaboration between TOMRA, Duursma, and Nidec Drives, this project serves as a textbook
The Commander S variable speed drive aligned with TOMRA’s commitment to sustainability and durability
example of effective teamwork and innovation. TOMRA is highly satisfied with the swift response from Duursma, who worked closely with Nidec Drives to deliver a timely and reliable solution. “This project is further confirmation for us that in Nidec Drives we have a partner we can rely on. With their extensive knowledge, experience, and range of Control Techniques variable speed drive products, we were able to quickly find the optimal solution for TOMRA,” stated Duursma. The success of this collaboration is attributed
to the strong communication between Duursma’s engineering team and Nidec Drives, allowing for quick and effective responses to the customer’s needs. The triangular relationship – where both Nidec Drives and Duursma maintain direct contact with TOMRA – proved essential in delivering a customer-specific, innovative solution.
INNOVATION Thanks to the collaboration between Nidec Drives and Duursma, along with the introduction of the Control Techniques Commander S in TOMRA’s Z-conveyor, TOMRA can now offer an efficient solution that helps collection points comply with current laws and regulations. This innovation allows TOMRA to maintain its
pivotal role in the circular economy, making it easier for consumers to return their packaging and contribute to a sustainable future.
Nidec Drives
www.ControlTechniques.com T: 01686 612300
MAY 2025 DESIGN SOLUTIONS 21
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