Multi-axis and more demanding single axis applications can now take advantage of the design, performance and cost benefits of Profile Driven Unit (PDU2) technology from HepcoMotion®. This belt-driven linear motion system has proved a popular and cost effective choice for many designers seeking a high performance, standard precision solution to fit into a compact space envelope. And in common with all HepcoMotion® products PDU2 has been the subject of continuous development, the result of which is now the introduction of PDU2M.
The PDU2M delivers a 200% increase in moment load capacity and 1000% uplift in moment load stiffness compared to a standard PDU2. Direct load capacity is also 50% greater. In practice this means, for example, that designers can use a single PDU2M unit as a horizontal axis in an X-Z system, where previously two PDU2 units working in parallel would have been required to provide the necessary rigidity and strength.
Key to this capability is the extra ultra-high performance HepcoMotion Herculane® wheels that are mounted on adjustable eccentric studs. These wheels run virtually friction-free on the inside of the profile providing stable support for the carriage plate; felt wipers sweep debris from their path. The unit is available with a number of carriage designs to allow the quick and easy construction of multi-axis systems with a minimal requirement for brackets and other hardware.
In common with its forerunner, PDU2M comprises a rigid but lightweight aluminium slotted profile into which fits the toothed belt drive and carriage, an arrangement that effectively encloses the unit. It is rated for operating at speeds of up to 6m/s and available with a choice of motors providing driving forces up to 280N. The options include a Smart Drive Taranis stepper motor drive and control package for multi-axis applications.
Left, right or double drive shafts can be specified together with a range of options such as brakes, positioning encoders and mechanical or inductive limit switches. End of stroke protection is provided as standard at both ends by internal buffers.
The development of PDU2M extends the scope of HepcoMotion® to provide cost competitive, high performance and low maintenance linear solutions for an even wider range of applications. It is of course fully compatible with the company’s MCS aluminium machine construction system and is expected to find its niche as a replacement for failing ball-based systems that are unable to match its speed and reliability.