A big linear step forward… for small applications

Citation

(2003), "A big linear step forward… for small applications", Assembly Automation, Vol. 23 No. 2. https://doi.org/10.1108/aa.2003.03323baf.007

A big linear step forward… for small applications

A big linear step forward… for small applications

Keyword: Linear motion

Hepco’s new profile driven unit (PDU) plugs a significant gap in linear motion technology. It is a robust, high performance system designed specifically for applications requiring a cost effective solution to fit into a compact space envelope. Mechanically simple but highly innovative, PDU is very attractively priced and can satisfy the light-load, slow moving application to the more dynamically arduous high speed requirement (Plate 5).

PDU is the product of a marriage between proven belt technology, advanced engineering materials and Hepco’s expertise in aluminium profile design. It comprises a slotted profile into which fits a drive belt and carriage. This arrangement effectively seals the unit. But perhaps the most significant element of the PDU system is Hepco’s new Herculane^® wheel technology.

Plate 5 The latest innovation from Hepco Slide systems is the new PDU which was introduced in the UK in November at the TEAM exhibition

These wheels run virtually friction-free on the inside surface of the profile providing stable support for the carriage plate. The unit offers extremely low friction and due to the wheel rolling motion it will run without the need for any lubrication.

Hepco guide wheel systems have long been associated with high-speed operation unmatched by ball-based systems. PDU is no exception to this rule. It is rated for operating at speeds up to 6 m/s. At 600 N, the PDU’s load capacity is equally remarkable for a unit that measures just 60 × 51 mm in cross section.

The carriage plate of the PDU is designed to accommodate the mounting of a second PDU unit. In this way a compact, high-performance X-Y system can be quickly and easily created. Integral end of stroke protection is provided as standard.

A choice of motors is provided with PDU, offering driving forces of up to 280N. A typical AC inverter motor will deliver a linear force of 145 N and speeds of over 5 m/s. Optional tubular flanges ensure easy connection to most makes of motors and gearboxes.

Drive shafts can be configured left, right or double and other available options include holding brakes, positioning encoders and limit switches. Another time-saving feature of the PDU is the built-in switch cam on the carriage plate that can be rotated to change sides.

Naturally, PDU is fully compatible with Hepco’s MCS aluminium profile system and its competitors making it an ideal replacement for failing ball-based systems. Typical applications for the new PDU would be the movement of print heads and similar automation needs in food and pharmaceutical packaging.

For further information contact: Hepco Slide Systems Limited, Lower Moor Business Park, Tiverton Way, Tiverton, Devon EX16 6TG. Tel: +44 (0)1884 243400; Fax: +44 (0) 1884 243399; E-mail: hepco@hepco.co.uk; Web site: www.hepco.co.uk