Abstract
Research work has shown much interest in the tool wear monitoring and the system control of micro-EDM process. Offline measurement, touch sensor, and laser sensor were used to obtain the tool length during machining, hence the wear. However, the time taken and the inaccuracy introduced by the offline method and electrode movement for the usage of sensors have become the major setback. A reliable process monitoring of the tool wear in real time is highly crucial since the requirements of the accuracy of the machined features are more demanding in the micro scale. This paper proposed a development of online monitoring of the tool wear in micro-EDM process based on the crater prediction using a developed theoretical model. The TWR approximation value is then used to determine the compensation required in the Z-Axis direction to improve the accuracy in blind hole fabrication. The verification are performed experimentally by comparing the machining results with and without compensation. The presented results show that this method is able to improve the error within 1% to 7.6% of the hole depth setting.
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Yeo, S.H., Kurnia, W., Tan, P.C., Mushan, M. (2007). Development of in situ Monitoring and Control of Micro-EDM Process. In: Hinduja, S., Fan, KC. (eds) Proceedings of the 35th International MATADOR Conference. Springer, London. https://doi.org/10.1007/978-1-84628-988-0_18
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DOI: https://doi.org/10.1007/978-1-84628-988-0_18
Publisher Name: Springer, London
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