Powerful positioning axes
A total of four RK Duoline 160 Z toothed belt-driven linear axes were used as X-axes - two with one carriage each (packer) and two with two carriages each (unpacker) to accommodate the linear axes in the Z-direction. The axes have an encapsulated guide system and, thanks to the toothed belt drive, are predestined for dynamic positioning and handling tasks, as required in the sorting of empties. Their repeat accuracy is plus/minus 0.05 millimeters. They therefore reliably meet the cycle times of less than eight seconds required for sorting empties. Thanks to a cover strip, the linear axes achieve protection class IP 40. Clamping strips allow the axis to be securely fixed and a central lubrication option via funnel lubrication nipples simplifies maintenance. An optionally integrated position measuring system also ensures high positioning accuracy along the entire axis length. Loads - in this case the Z-axes with the bottle grippers - can be securely mounted using sliding block rails. As the RK Duoline Z axes allow a variable motor arrangement, the configuration of the motor shaft can also be changed at a later date - the customer does not have to commit to a specific position when ordering. Optional coupling and spigot adapters can be attached to all four outlets of the diverter. In addition, the Duoline offers high efficiency and a low idling torque of just 2.5 Newton meters.

Lean workstations can be supplemented with screen holders and keyboard trays. (Image: R+K)

Toothed belt-driven profile linear units of the type RK Duoline 120 x 80 Z 3G were selected for the Z-axes. These linear units with ball screw drive also have the above-mentioned features - with the exception of the variable motor arrangement.

Two-axis gantry with lifting station
Rose+Krieger combines Blocan construction profiles with SQZ and SQ-MT profile linear axes for a two-axis handling system for removing and depositing finished plastic molded parts. Two SQZ toothed belt axes form the X-adjustment. A transmission unit ensures synchronization. Two SQ-MT toothed belt axles arranged in parallel and also connected via a transmission unit function as the Z adjustment. They are connected via a mounting frame made of construction profiles and can take a load of 75 kilograms in the application; the working stroke is 1,250 millimetres. The SQZ linear units with toothed belts are designed for high dynamics with long travel distances. They are particularly suitable for positioning tasks with short cycle times, high cycle rates and high repeat accuracy.

Grab trays and containers can be optimally positioned with support arms. (Image: R+K)

Repeatable applications
Rose+Krieger developed the Monoline especially for pick-and-place applications. The compact toothed belt-driven linear unit for the medium load segment is a further development of the SQZ axis. It impresses with its high power density and a variable mounting concept for all motors. The RK Monoline is currently available in sizes 40, 80 and 120. The linear unit has a wide and resilient toothed belt made of neoprene with a steel insert. It guarantees the good dynamics of the axis. The belt is flush with the guide profile and is self-guided; this means that these linear units can be easily mounted overhead or vertically, even in longer lengths, without the toothed belt sagging due to its own weight. Alternatively, they are available without a drive as a torque support. pb