Power-off Auto-centering

Safety Feature:

Standard linear actuators operate only when powered. During power loss, the actuator (and connected crane joystick) would remain locked in position, potentially creating hazardous conditions.

Tianma's Solution - Power-off Auto-centering: 

All our linear actuator remote systems include auto-centering functionality. Even during unexpected power loss, the actuator immediately returns to neutral (resetting the crane joystick to its original position and halting operation).

Video for details:

Auto-Centering