Machines with three operating robots


The use of 3 robots per machine is theoretically possible (Fig. 50). Two robots (RB 1 and RB 2) each serve one side of the machine, while the 3rd robot (RB 3) supports the other two robots by operating alternately on one side of the machine and then on the other. However, the long distances traveled by the 3rd robot via a loop from one side of the machine to the other – amounting to more than one-fourth of its working range – mean that only a very limited improvement in efficiency can be achieved. A major drawback of this concept is that the third robot seriously disrupts work at the end of the machine, such as the removal of full packages, due to its frequent movements back and forth around the loop on the tailstock. The concept with 3 robots per machine has not become established in mill operations to date.

Fig. 50 – Travel strategy with 3 operating robots. One robot on each side of the machine, robot #3 serves each side alternately