On the one hand, considering the speed, the patch efficiency directly determines the work efficiency of the whole machine; on the other hand, from the point of view of precision, on the other hand, the patch control system design of the voice coil motor is the core unit of the RFID packaging equipment. The size of the RFID chip is very small (for example, 0.4mm0.4mm ×), and the job of the chip placement machine is to accurately attach the chip to the antenna substrate pad to ensure the reliability of the connection. This places great demands on the mechanical structure and control system.
Patch is a complex action flow. To achieve the action patch not only need to servo motor, voice coil motor and linear motor coordinated control, but also related to pneumatic, machine vision and so on. In this device, the module of the patch module includes a total of 9 servo motors, 4 linear motors (two double acting), and 2 voice coil motors. All of these places high demands on the control system.
In a sense, a voice coil motor is equivalent to a linear motor and a rotating motor, each with a separate encoder for closed-loop control.
The voice coil motor is a special form of direct drive motor that converts electrical energy directly to linear motion mechanical energy without the need for any intermediate converter gear. The principle is: in a uniform air gap magnetic field into a cylindrical winding, the winding electromagnetically energized to drive the load for linear reciprocating motion, changing the current strength and polarity, you can change the size and direction of the electromagnetic force. Therefore, voice coil motor movement can be straight or rotated. It has high response, high speed, high acceleration, simple structure, small size, good force characteristics, easy control and so on.
This article originates from Kunshan Tongmao Electronics Co., Ltd. (
www.tmmotion.com) original company, please indicate the source.
Linear motor