Voice coil motor control system and method for chip mounter

Abstract

The invention discloses a voice coil motor control system for a chip mounter and a voice coil motor control method for a chip mounter, which are applied to the technical field of automatic control. The system comprises a controller, a motor driver and a motor module; the controller outputs a control signal to the motor driver, the motor driver outputs a driving current to the motor module, and themotor module feeds back a force signal and a position signal to the controller and the motor driver respectively and controls a chip mounting head on the chip mounter to reach and be far away from achip position; and a first switch and a selection switch are arranged in the controller and used for switching control modes. The controller is provided with an integrator, position control, speed control and compliance control of the voice coil motor are achieved by controlling a selection switch and a first switch in the controller, and the three control modes of the position control mode, the speed control mode and the compliance control mode can be switched in real time according to actual needs.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a voice coil motor control system and control method for a placement machine. Background technique [0002] Voice coil motor drive is a direct drive system without intermediate links, with high control precision. It is widely used in chip placement systems, machine grinding systems, and macro / micro platforms. In these control systems, soft touch control is often required , such as chip placement in the chip placement system, it is necessary to control the first contact force, commonly known as "soft landing". [0003] In the document "Force / Position Control and Application Based on Voice Coil Motor" (Huang Hao. Huazhong University of Science and Technology Master Thesis, 2008), the current "soft landing" control method is summarized. It is realized by controlling the detection threshold of the following error, the control speed and the output current. The core idea of ...

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Problems solved by technology

[0005] Technical purpose: Aiming at the defect that the control process of the voice coil motor is relatively complicated and the control precision of the control force is low in the prior art, the present invention discloses a voice coil motor control system and control method for the placement machine, through the control The selection switch and switch one in the device are controlled to realize the position control, speed control and compliance control of the voice coil motor, and the three control modes of position control mode, speed control mode and compliance control mode can be switched in real time according to actual needs

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