Driver selection:
The choice of stepper motor driver is generally decided by the upper control system. Compared with the traditional driver, it only has the function of pulse amplification and needs the upper computer to send out the pulse signal. At present, the products with more technical content on the market are generally integrated products of drive and control. With the small stepper motor driver, the bus input signal can be received while amplifying the pulse. The sub-controller function can write some simple control programs to be executed offline, eliminating the upper computer. If the number of axles on the device is large and the motor is required to respond quickly, the driver driver controller of the small stepping motor is generally recommended. Therefore, when choosing the driver, it is necessary to provide information such as the number of axes of the device, the relevant control requirements and the model of the upper computer.

Whether to connect encoder:
The so-called open-loop control is a stepping system without an encoder. Whether or not it achieves the desired control effect, the motor will rotate according to the existing instructions, which will lead to inaccurate control. The general control accuracy requirement is not particularly high. The stepping system with an encoder is a closed-loop stepping control, and the encoder can monitor the rotation of the motor shaft in real time and send the message. The controller adjusts the driving current according to the feedback signal. It can prevent step loss and make the output torque of the motor bigger. At the same time, it can also make the stepper motor achieve higher speed.
As shown in the following figure, a highly integrated stepping control system integrates motor, encoder and drive controller, which greatly reduces the volume of stepping system and optimizes the system step line.