Which device is primarily responsible for controlling the vertical lift of the load on an overhead crane?

Which device is primarily responsible for controlling the vertical lift of the load on an overhead crane?

• A. Trolley controller
• B. Hoist controller
• C. Bridge controller
• D. Operator joystick

Answer: (B)

The device that directly governs raising and lowering the load is the hoist controller. It takes the operator’s lift command and drives the hoist motor, handling lift speed, direction (up or down), and safety features like limit switches and overload protection. The trolley controller handles horizontal movement of the hoist along the bridge, and the bridge controller moves the entire assembly along the rails. While the operator joystick or pendant is the input that tells the system what to do, the actual vertical lift control comes from the hoist controller.

The device that directly governs raising and lowering the load is the hoist controller. It takes the operator’s lift command and drives the hoist motor, handling lift speed, direction (up or down), and safety features like limit switches and overload protection. The trolley controller handles horizontal movement of the hoist along the bridge, and the bridge controller moves the entire assembly along the rails. While the operator joystick or pendant is the input that tells the system what to do, the actual vertical lift control comes from the hoist controller.