Detection equipment for Bottom Dead Center of punching machine

Bottom Dead Center (BDC) dynamic accuracy is the key performance indicators of punching machine; it is an important indicator assessing the level of product technology and manufacturing. In this paper, using LabVIEW virtual instrument technology, combining with eddy current sensors, high precision A/D sampling circuit, after analog filtering, real-time capturing and digital filtering, the detection equipment collected BCD curve. And using detection algorithm without the aid of other auxiliary pulse signal, it implements the BDC´s identification. And then output test report using Excel software. The resolution of measurement reaches 1 micron.