Application of macros and subprograms for milling sprockets on a small memory CNC milling machine

Purpose: The study examined the production of sprocket milling with a CNC double-column milling machine with the FANUC Series 0-M operating control system, which has a small memory. The researchers applied macros and subprograms to reduce working time and costs, as well as the program size (NC file) and the number of times an employee enters program data. The solution is to improve the ability of machines to keep memory low due to old-fashioned technology. The ideal uses a simple program to operate the machine easily. The benefits of work focus on the machine time and operation cost to produce a part. Design/methodology/approach: Applying macros and subprograms for the sprocket milling cutting programming, the primary programming was called a subprogram, sprocket milling according to specified cutting on teeth. It could be used to set the depth level and repeat the millings until the total depth level was specified. Then, it lets the macro adjust the variable to get the next teeth in order until it completes the number that the programmer automatically specifies. A comparison of the performance of both methods in conventional and applied macro and subprogram can be measured from the total working time and compared with the earnings per unit of working time. Moreover, it also counts the number of entries in the worker’s program data feeds. Findings: The researchers found that macros and subprograms in sprocket-milling programming could reduce the programming time and the number of times to input the program data into the CNC cutting machine. Reduced time would have a direct effect on earnings. The sprocket milling was larger than the working area of the CNC milling machine. Workpiece clamping can be increased more than once, and the program can also specify the number of teeth to be milled. Research limitations/implications: CNC machine control programming (NC file) with macros and subprograms. Practical implications: The total time spent on the work is crucial to the production process resulting from the written program. Sprocket milling testing with macros and subprograms has been found to reduce time and total operating costs. Originality/value: The application of macros and subprograms can reduce time to program and time to work, which were modified specific variables of the macro. The result was reduced operating costs. It also reduces the number of times an employee uses the program.