The drive which is used for metal-cutting machines tools, rolling mills etc. are
Right Answer is:
Multi motor drive:- In “multi-motor drives” separate motors are provided for actuating different parts of the driven mechanism.
Example: In traveling cranes, three motors are used: one for hoisting, another for long travel motion, and a third for cross travel motion.
Such a drive is essential in complicated metal-cutting machine tools, paper-making machines, rolling mills, etc.
The use of individual drives and multi-motor drives has led to the introduction of automation in production processes which, apart from increasing the productivity of various undertakings, has enhanced the reliability and safety of operation.