The automatic workspace switching a motorized positioner has the advantage that the operator has to spend time and energy for the rotation. Disadvantages are greater space requirements and higher costs due to the necessary safety devices such as light barriers, foot mats, etc. The cycle time is increased by „long distances“, which additionally stress the operator, especially during short working cycles.

The manual workspace switching a positioner makes the elaborate safety equipment superfluous. The operator performs the rotary motion of the positioner itself. Advantages are „short distances“, the operator moves directly in front of the positioner. Lower space requirements, shorter cycle times and lower procurement costs. The great disadvantage of this system, the operator is exposed to the constant rotation of the positioner of large physical strain.

The patented Robolution pulse drive GRA combines the advantages of both systems without their drawbacks. The operator is located in the work area of ​​the positioner as in the case of the hand-operated system during the station change. By actuating the start button, a short rotary pulse is triggered, which gives the positioner the necessary momentum to initiate a change of position. Instead of the force required by the operator, the rotary pulse is generated by a compressed air surge. In emergency situations, the positioner can be simply stopped by hand. All safety requirements are fulfilled, since this is not a force-coupled rotary movement.