The only motor in the component will be controlled by EV3 system, using programs, to let the motor rotate, since the length of the string as well as the height of the forklift is limited, so that there's a maximum and minimum level of lifting or descending, if the motor is still rotating, and it has already reached to it's peak, the consequence will be significant. so we could program the motor so that if it reaches it's limitation, it will stop moving,