Abstract:According to the production requirements, Design a fully automatic high-precision micro spotting head according to production requirements to achieve high-precision spotting during the preparation of biochips. The mechanical structure of the spot is drawn using CAD drawing software and then machined according to the drawings. The system sets parameters through the host computer, control the stepping motor to drive the crossbar and needle handle movement with STM32 microprocessor, display the corresponding data on the OLED display at the same time.n the process of preparing the biochip, the spotting head can be closely matched with the spotting platform, the mechanical structure is stable, the degree of automation is high, and the operation is convenient, and the biological spotting of the biochip can be realized with high precision.