Research on the Use of Fault Diagnostics in CNC Wire Cutting MachineHE Kai-ming,CHEN Yan,WANG Rong(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430070,China)Researched on the use of fault diagnostics in the machine.The principle of work and control of a CNC wire-cutting machine was analysed.Control equations which can be applied to production were set up with differential geometry theory.Then,a reasonable system Fault-tree was set up.Quantitative analysis based on the construction functions obtained was done.The achievements in the research and analysis were applied to practical equipment maintenance management of the machine successfully.CNC;wire cutting machine;fault diagnostics