A kind of method includes receiving object support motion disable signal to indicate that at least one power removes imaging system, impact levels mobile desktop imaging system, the horizontal movement drive system driving of decoupling is configured to horizontal table top, or the imaging system of the mobile object of collision bracket, whereinThe drive system driven object support vertical that moves vertically is mobile, and forbids in response to receiving object support motion disable signal, at least one desktop horizontal movement or body supports vertical movement.
