Fundamental Principle Using a microcomputer-controlled stepper motor, EX3600 Automated Nucleic Acid Extraction Instrument can achieve precision transmission down to 0.1 mm. The magnetic field strength on the magnetic bar surface is greater than 2500 G, which can complete the transfer function and preset bead movement through the interaction of magnetic bars with ferromagnetic or ferrous magnetic beads (0.03μm≤D≤10μm, D: particle diameter). With the corresponding magnetic bead extraction kits, the instrument can extract nucleic acids from samples by controlling the movement of the magnetic bar and magnetic lid to collect, release and transfer the magnetic beads.