Numerical Control Programming Instruction Study - G01 Linear Interpolation 1

 When learning numerical control programming, G01 is one of the first interpolation instructions to be learned. Its purpose is to move the tool along a straight line at a given speed to reach the target point. The format is as follows:

G01 X_Y_Z_F_

Here, X_Y_Z_ represents the position of the target point. When executing this code, the tool will move along a straight line at the set speed F to reach the target point X_Y_Z_, creating a linear motion. Importantly, this instruction implies that the tool must move in a straight line from its current position to the target point. Therefore, if we want to move along a specific line on the workpiece, we need to first move the tool to the starting point of that line.

Let's take the example of a key-shaped contour composed of straight line segments to illustrate the application of the G01 instruction. Assuming the tool is cutting down 2mm into the workpiece for the trajectory. The contour consists of an outer and inner ring. When the outer ring contour is completed, the tool cannot directly move from Z-2 height to the corner of the inner square contour; otherwise, the trajectory will be incorrect. After completing the outer ring, the tool needs to be raised above the workpiece surface, then moved to the corner of the square contour, and finally lowered to -2 height to cut the rectangular contour.

Here is an example of a relevant CNC program code:

G90G54G40G1Z100F1000M03S3000 G0X0Y0 X40Y70 Z5 G1Z-2F50 G1X40Y90F1000 X50Y100 X70 Y110 X80 Y100 X90 Y110 X100 X110Y100 X140 X150Y120 X170 X180Y100 Y70 X170Y50 X150 X140Y70 X40 G1Z5F200 ; Finish outer ring contour, retract tool G0X150Y70 ; Move to starting point of inner ring contour G1Z-2F50 ; Lower tool to cutting depth Y100F1000 ; Continue cutting rectangular contour X170 Y70 X150 G1Z5F200 G1Z100F1000 M5 M30

In the above code, the key-shaped contour is machined by using the G01 instruction and other auxiliary instructions. By properly moving and interpolating the coordinates, the tool can move along a straight line at the set speed to cut the desired contour shape.

Finally, simulation can be used to verify the correctness of the program and the accuracy of the contour, ensuring that the machining result meets the design requirements.

The above information provides an introduction to the study and practical application of G01 linear interpolation in numerical control programming. Mastering the G01 instruction and its application will greatly enhance CNC programming skills and enable precise machining.