Sun-Kyu Lee
Gwangju Institute of Science and Technology, Korea
Title: Micro-topography generation method using a rotating tool actuated by an electromagnetic actuator
Biography
Biography: Sun-Kyu Lee
Abstract
This paper presents a micro-patterning or surface texturing technique on the fixed work surface using a proposed new spindle system with a rotating cutting tool controlled by the electromagnetic actuator in real time. The proposed spindle system creates micro-sized patterns using rotating tools such as a micro-milling tool and a micro-grinding wheel. The shaft of the spindle is suspended by air bearings, and an electromagnetic actuator controls the radial motion of the spindle housing instead of the shaft. A PID controller is adopted to make the system stable, and adaptive feedforward cancellation is used to effectively compensate for the run-out of the spindle system during machining. The micro pattern array and the digital images are generated on the electro-less Ni coated workpiece using a single-flute diamond square end mill. The machining results show that the run-out compensation improves
the machining accuracy. It is expected that micro-patterning using the proposed spindle system can be applied over a large surface area which is fixed at the work table.