Single-axis motion control system

2-axisstepperservomotor

Motion control systems are capable of extremely precise speed, position, and torque control. Applications, such as life science and diagnostics microscopy, which require precise positioning of samples, synchronization of separate instrument elements, or fast start and stop motion are all perfect candidates for the use of motion control. The performance of these complex systems is dependent on the mechanics, motion control electronics, and software used withing the motion control system. Typically, a motion control system consists of a motion controller, drive, motor, and a device for position feedback. A motion controller is a programmable device that controls the motion path, the servo loop closure, and the sequence execution in automated motion control systems. Basically, the controller is the “brains” of the motion control systems. Based on the motion requirements, the motion controller establishes the motion trajectory, send control signals to the drive circuit to “drive” the motor, and in a closed loop system compares the actual position feedback signal from the encoder to the commanded trajectory, and uses the control loop to take corrective action if needed, ideally with little or no error. Depending on the motion control system, either the main controller or drive utilizes position feedback devices such as resolvers and encoders to achieve high precision motion tasks. The drive receives low power signals or commands from the controller and then converts those signals to a high power signal that the motor needs to operate.