The electronically controlled permanent magnet chuck is a new type of fixture designed and developed in combination with electromagnetic and permanent magnet characteristics. A new type of magnetic chuck that uses electric pulses to "open and close", the time required to "open and close" is less than 1 second. The suction cup is very safe and reliable in the process of holding the workpiece for processing. After holding the workpiece with magnetic force, the suction cup will maintain the magnetic suction force indefinitely. Widely used in CNC machining centers, milling machines, engraving machines, etc.