本机托盘是用S型扳簧支撑，电磁铁做周期性吸动，使托盘作巡回往复的螺旋线

The tray of this machine is supported by an S-shaped trigger spring, and the electromagnet is periodically sucked to make the tray vibrate in a reciprocating spiral. The main circuit of the electromagnet power supply is an AC switching circuit composed of four silicon diodes connected as a bridge (for AC paths) and a thyristor to make the electromagnet periodically excited. The thyristor trigger signal is controlled by a computer to adjust the operating frequency.

The machine tray is supported by an S-type reed, and the electromagnet does periodic suction, which makes the tray vibrate the spiral wire back and forth. The main circuit of the electromagnet power supply is an AC switch circuit consisting of four silicon diodes connected to a bridge (for AC path) and a controlled silicon tube, which makes the electromagnet periodic magnetization. The SDR trigger signal is a computer-controlled adjustment of the working frequency.

The tray of this machine is supported by an S-shaped spring, and the electromagnet is periodically sucked to make the tray vibrate in a spiral line. The main circuit of electromagnet power supply is an AC switching circuit composed of four silicon diodes connected to bridge circuit (for AC path) and a thyristor tube, which makes the electromagnet periodically magnetized. The trigger signal of thyristor is controlled and adjusted by computer.