The kinematic mechanism of span winch mainly includes mechanism of hoisting, ±luffing, rotation, and running. The running mechanism ÷is a non-working mechanism.

Key techniques of the span winch electric control system

Multiple main hooks can combinational synchronous as: position s•ynchronizing, speed balance, moment balance, auto flux-weakening

1. grab span winch, grab auto switching and deep-excavation± control
2. hoisting slip proof control
3. complete safety protection for electric control system
4. humanity span winch HMI