Is the servo motor and servo motor driven together a set of products
Servo motor and servo drives can be composed of a set of products, whether you need to add other device, the control of the actual need, if necessary, can add industrial computer, and so on PC or PLC
It seems that you also is not very understanding of motor, and general motors can achieve positive &negative, as long as it's not very frequent positive &negative, ordinary motor is possible. In addition, there is a special anti-rotating motor. To control the speed, the key is to see the accuracy you need to control, and if the accuracy is not high enough, you can use a converter and ordinary motor to get it done. The converter can also help to get the right and reverse functions of the motor
The servo motor cannot be operated by itself, it needs to be controlled by the supporting actuator. The actuator of the actuator reads the speed, position, torque and other closed loop control. The actuator itself can produce less complex control signals, and for more complex motions, a PLC is required to give control signals.
