Which controller handles vertical motion of the crane?

Which controller handles vertical motion of the crane?

• A. Trolley controller
• B. Hoist controller
• C. Bridge controller
• D. Travel controller

Answer: (B)

Vertical motion is produced by the hoist. The hoist is the lifting unit that raises and lowers the load by winding rope on a drum, giving up-and-down movement independent of horizontal positioning. The trolley moves the hoist along the bridge for side-to-side positioning, while the bridge (travel) controller moves the entire crane along the runway. So the controller that handles vertical motion is the hoist controller.

Vertical motion is produced by the hoist. The hoist is the lifting unit that raises and lowers the load by winding rope on a drum, giving up-and-down movement independent of horizontal positioning. The trolley moves the hoist along the bridge for side-to-side positioning, while the bridge (travel) controller moves the entire crane along the runway. So the controller that handles vertical motion is the hoist controller.