The pulse type open-loop fully digital stepper driver adopts the new 32-bit DSP control technology and servo like control principle, integrates the M O D B U S-RTU standard protocol specification, and integrates vector control technology, built-in micro segmentation technology, and adaptive filtering technology, greatly optimizing the performance of the stepper motor. It runs smoothly at low, medium, and high speeds with low noise. The precise and smooth pure sine current vector control technology effectively reduces motor heating.