Dr. Chao Sun was a Technical Lead working within The University of Sheffield Advanced Manufacturing Research Centres (AMRC) Machining Group. He is an experienced post doctoral researcher and has been working at the AMRC for 5 years. Before he joined the AMRC, he did his postdoctoral research on machining dynamics at the University of British Columbia in Canada. He joined the AMRC as a Project Engineer working on robotic machining dynamics. Later, he worked as a Technical Lead in machining dynamics. He and his colleague developed the power skiving force simulation model and helped to optimise the power skiving process.