Programming of G90 Circular Cutting Cycle Instruction
The basic interpolation instruction can be used in CNC programming to complete most of the typical ma-chining processes of parts,but for the rough machining with large cutting amount or special contour,if the basic interpo-lation is completely used to complete,it will bring a series of troubles such as large calculation amount,cumbersome pro-gram,and numerical error prone.In the numerical control system,multiple repetitive or similar machining paths and cut-ting parameters are combined with fixed parameters and pre-programmed and stored in the memory,and the parameter values can be flexibly changed,and the fixed G code is called to control the machine tool for a preset series of fixed opera-tion actions,so as to complete the processing.We call these G codes loop instructions.Circular programming can be used to reduce the order of magnitude of the program segment and save the storage space of the machine tool for non-single-tool machining of the contour surface,that is,the surface with large machining allowance[1].
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