Abstract:
Very High Speed Integrated Circuits Description Language (VHDL) has gained a lot of interest in the field of high-speed computer numerical control machine digital controllers (CNC) where high processing speed at the servo loop update time is critical. With the implementation of the programme to reconfigurable devices like Field Programmable Gate Array (FPGA) have advantages over microprocessors and DSP with similar logic complexity because their open architecture makes them suitable for system on-a-chip applications. VHDL is a language for describing digital systems. VHDL is intended to support the hierarchical design, documentation, and simulation of hardware from simple logic gate to complex digital systems. Hardware designs can be specified as purely behavioral descriptions, data flow and structure. The versatility of VHDL allows it to be used for this Computer numerical control machine system circuit technology while remaining independent of underlying implementation. By using this language, CNC is developed by combining six subsystems which are Control Unit, Integrator, Tool change Spindle control, Motion Control and Coolant control. To verify the CNC system is correct, a simulator is the model. Every subsystem is simulated to make sure the output of CNC is correct. From the simulation result, all of the objectives had been achieved. Comparison between simulation result and input parameters shows that CNC outputs are archived all the specification needed. The use of VHDL has not oncy made the development of CNC design more economically but has simplified the CNC development process by using an integer rather than binary that made the system more complicated.
