The directly-driven robolink D kits follow igus’ earlier robolink W kits which were driven indirectly using wires. The new range is more precise and can handle loads of up to 4kg. “The direct drive makes the robolink articulated system tougher and more durable than before, opening up more opportunities for lean automation,” says igus UK director, Robert Dumayne.
The articulated joints, available in three sizes, consist of plastic slewing ring bearings, worm gears and connecting components, as well as limit switches used to define zero points. Various plastic and aluminium connecting elements are available. A new gripper adapter allows a choice of grippers to be attached to the robolink D arms.
Also on show in Hannover was a harmonic gear drive which could be used to provide a radially movable connection between the arm and a gripper. “The harmonic drive has the advantage that it has scarcely any backlash, and thus a precise adjustment, ensuring smoothness,” explains igus' robolink product manager, Martin Raak. “Moreover, it is very compact and has a high gear ratio.”
At Hannover, igus was also demonstrating an online configurator that can be used to design the low-cost robotic arms. The company does not intend to supply control systems for its arms, which will work with existing controllers. At the Fair, igus was demonstrating an arm operating with a Beckhoff controller.