Tool condition monitoring of PCB milling machine based on vibration analysis

Abstract

In recent years, specialized machinery processing technology focuses precision, high-speed, and high-performance, Which makes micro-fabrication as an essential factor such as like printed circuit board (PCB). It has smaller aperture, which tends to be extreme due to vibration. The vibration has negative impacts on machining accuracy as well as roughness of the surface will increase the abrasion of the tool and thereby accelerate the decimation of material fatigue. Perforations are made in many ways, such as laser micro-machining including micro-drilling. The cost and the technological consideration in the industry adopt micro drill piercing method. In micro machining applications tool condition monitoring devices are essential. In certain cases device safety is determined indirectly by measuring and evaluating parameters of the cutting operation. In that sense, the main challenge lies in choosing processing parameters and its processing techniques, so that a robust and accurate evaluation of the health tool is achieved. This work involves vibration signal-based analysis to estimate the tool condition of a PCB milling machine's high-velocity micromachining process. In this project a micro-tool condition monitoring system composed of spindle accelerometers is used to measure vibration. In addition, outcome of the analysis from acquired vibration signals improvises life of the instruments.