Linear actuators extend possible load range
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Festo product story
Edited by the Engineeringtalk editorial team
Jul 8, 2008
DGC actuators employ an angled sealing mechanism between the carriage drive and the actuator body, which ensures virtually zero air leakage and facilitates the manufacture of extra-long actuators.
Festo has released two high-performance pneumatic linear actuators, extending the load-bearing capabilities of its DGC family.
The DGC-50 and 63 actuators feature internal piston diameters of 50 and 63mm respectively, providing significantly more force and higher payload capacities than other actuators in the same series.
The top-of-the-range version of the DGC-63, for example, can accommodate payloads in excess of one tonne - approximately 50% more than the previous largest model.
Festo's DGC family of pneumatic rodless actuators now spans eight cylinder sizes, ranging from 8 to 63mm.
Standard models within this series offer velocities up to 3m/s, forces as high as 1870N and up to 5m stroke lengths as standard.
DGC actuators employ an angled sealing mechanism between the carriage drive and the actuator body, which ensures virtually zero air leakage and facilitates the manufacture of extra-long actuators.
Festo has supplied DGC actuators with stroke lengths of up to 9m to special order.
DGC series actuators offer a choice of three types of carriage guide, The basic guide features a plain polymer bearing suitable for light loads; the medium load guide also uses plain polymer bearings running on a guide rail compactly integrated as part of the actuator extrusion and is factory-adjusted for optimum performance; and the high-performance guide uses stainless steel caged and sealed recirculating ball bearings.
The last type can handle very smooth and high-speed movements, has zero backlash and is capable of accommodating loads that apply a high moment of torque to the carriage, such as cantilever and offset loads.
Festo has also introduced a range of additional functions that can be configured, priced, built, tested and delivered as a single assembly.
These include a mid-position stop module called a DADM unit and an integrated displacement encoder.
The DADM caters for motion sequences that require any number of intermediate positions, such as work-piece handling.
It is easily mounted on the actuator and provides a cost-effective solution for dynamic applications demanding high mid-position accuracy.
The DADM is suitable for both right and left-hand approach movements, enabling the full dynamic performance capabilities of DGC series actuators to be realised.
The displacement encoder can be used for measuring or closed loop positioning control, providing a very neat and cost-effective positioning solution pitched below the cost and dynamic performance of an electrical servo axis.
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