Precision force control via macro/micro actuator for surface mounting system

This paper presents a macro/micro positioning system for force control of a chip mounting system. In the proposed macro/micro system, the macro actuator provides the system with gross motion while the micro device yields fine tuned motion to reduce the impact force that occurs between electronic parts and the PCB surface. In order to prove the effectiveness of the proposed macro/micro chip mounting system, we compare the proposed chip mounting head with a conventional head equipped with a macro actuator only. A series of experiments is executed under the mounting conditions of various access velocities and PCB stiffnesses.