FEATURE LINEAR MOTION Machine development
Technology from HepcoMotion has helped in the development of a range of equipment, including a multi-purpose packaging machine and a modular honing machinery
P
roducts from HepcoMotion are proving beneficial for a range of
machinery across different industries. Let’s take the packaging sector as our first example. Here, HepcoMotion’s DTS2 driven track system has been selected by a designer and manufacturer of bespoke and generic packaging machinery. For a recent project, the company was tasked with producing a compact multi- purpose packaging machine capable of a high product throughput. The machine packs the product into a two-piece container which is then inserted into a foil envelope, sealed and offloaded at a rate of 84 pieces per minute. For this, the company required a precise and reliable carousel system to perform the functions over long periods with minimal maintenance, so the DTS2 was selected. This uses a twin drive scroll system that provides a direct and highly dynamic drive, enabling an index distance of 500mm to be achieved in just 0.5 seconds – a key factor in achieving the 84 parts per minute target. The linked track system offers an accurate and repeatable indexing movement, a vital requirement when items are being processed in such a short cycle time. A DTS2M was supplied with 16
carriages equally spaced around the rectangular format track system. Due to the high acceleration forces required to meet the indexing time, two linked drive scrolls, driven by a single servomotor, provide the drive. This specification allows the transfer of payloads of up to 2kg per carriage to be indexed over 500mm in just half a second.
22 JUNE 2016 | DESIGN SOLUTIONS
The HDS2 beams, which are available in modular lengths, were selected for the Apperley Honing machine
Thanks to the design of the track system, Colin Mear Engineering has been able to develop a packaging line that can be used in multiple industries – ranging from food and tobacco to pharmaceutical. Being flexible, the system can run different products with minimal changeover time.
HONING MACHINE DESIGN In another application, Apperley Honing develops and manufactures the TUBEHONE honing machine. Its latest horizontal hone can be supplied in 2m, 4m, 6m, 8m or 10m lengths, allowing customers to purchase a short stroke machine, which can then be retrofitted with extensions at a later date. Needing a solution for its modular chassis design, the company selected Hepco’s HDS2 beams which are available in modular lengths. The beams are machined and ended to make up butted sets, allowing the customer to accommodate different stroke lengths. Hepco’s HDS2 joining plate assembly holes ensure additional beams can be added with ease. A key consideration for any honing
machine is the need for products that can withstand hostile and dirty environments, as the by-product of the honing process is an abrasive sludge which contains a mixture of oil, spent abrasive and metal debris. Hepco’s V guide system effectively addresses the problem of debris entering the sliding mechanisms thanks to its self-cleaning action, ensuring a smooth and accurate hone. The TUBEHONE also uses a special 840mm long HDS2 carriage to provide the necessary platform area to mount the motor/gearbox honing head. In addition, three standard HDS2 carriages are used, each with 12 x M10 tapped holes for the piano stools to support the 8m long honing shaft. The HDS2 solution met the needs of the modular design.
HepcoMotion
www.hepcomotion.com
NEW LINEAR PIEZO NANOPOSITIONING STAGES SUIT HIGH-PRECISION APPLICATIONS
Suitable for high-speed and high-precision applications – such as scanning probe microscopy, disc-drive testing, and semiconductor wafer articulation – the QNPHD linear piezo nanopositioning stages from Aerotech are said to provide the benefits of both a stage and actuator in one compact package. With these, a direct-drive actuation design and optimised structure enable millisecond response and
move-and-settle times. In addition, FEA optimised precision flexures ensure high-stiffness, long device life, and high-dynamics while maintaining excellent geometric performance (straightness and angular errors) for critical nanopositioning applications. Of additional benefit, the optional closed-loop feedback using a capacitive sensor design allows for sub-nanometer resolution and single-digit nanometer linearity errors. When coupled with the company’s Q-series controllers and drives, the QNPHD demonstrates sub-nanometer positioning resolution and high-positioning bandwidth. This is available with rear and side cable exit
options along with mounting features for both horizontal and vertical orientations.
Aerotech T: 01256 855055
www.aerotech.com
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