可以在电机启动时让步进电机加速的程序，在系统集成时，电机启动时需要大的电流，启动时间越长对系统其它设备稳定工作越不利，所以需要让其启动加快。-Can give into the electric motor starts to accelerate the process, when integrated in the system, the electrical needs of a large start current, start-up time longer the other dev