? I have working in special machine building department. ? So I have to make new CNC machines, I have knowledge about panel designing and modification as requirement. ? I have knowledge about maintenance and troubleshooting of 840D Sinumeric and Sinamics Systems of Siemens which are Power series and SL series. ? I have also knowledge about NC programming with G-code and M- codes. ? I have also knowledge about various type of grinding Machines.