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FANUC CNC Milling Programming Basics - G02/G03 Circular Interpolation 2

 After learning the format and meaning of the G02 and G03 circular interpolation commands, it is important to practice with various examples. Below, we will use a complex contour composed of straight lines and multiple arcs for programming. When programming, it is important to note that G01, G02, and G03 are modal commands. If a program segment following one of these commands only provides coordinate values, it means that the interpolation mode from the last appearance of that command is still active. Therefore, when switching between contour arcs and straight lines, it is necessary to write the corresponding interpolation codes accordingly. The part drawing is shown below:



Program code:

T9M6 G90G54G40G1Z100F1000M03S3000 G0X40Y40 Z3 G1Z-2F50 G1Y100F1000 G2X50Y110R10 G1X140 G2X160Y90R20 G1Y40 G3X150Y30R10 G1X120 G3X80R20 G1X50 G3X40Y40R10 G1Z5F200 G1Z100F1000 M5 M30

The initial state of the workpiece before machining is as shown in the following diagram:



The simulated machining result is shown in the following figure:



Note: The program starts with tool change command "T9M6". It sets the coordinate system with "G90G54G40" and specifies the initial tool position with "G0X40Y40". The machining paths consist of a combination of linear and circular interpolation commands, such as G1 for linear movement, G2/G3 for clockwise/counterclockwise arcs, and various coordinates and radii. The program ends with spindle stop (M5) and program end (M30) commands.

Please note that the above program is provided as an example. It's important to verify and adjust the program based on the specific requirements of your machining operation.

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