A full CNC programming example with ID/OD (Turning/Boring operations) for cnc machinists who work on a cnc lathe machine. A must to learn/practice for those who are learning cnc programming. The added benefit of this programming example is that no cnc lathe canned cycle is used in this programming example. Read & Download CNC Machine Manuals without Limits on any device. Your best companion in cnc machine shop. CNC programming operating manuals and many more. In absolute programming, the G90 command indicates to the computer and MCU that the programming is in the absolute mode. Point-to-Point or Continuous Path CNC programming falls into two distinct categories (Fig. The difference between the two categories was once very distinct. Now, however, most control units are able to handle both point-to.
Hello, My name is Tom Stikkelman and welcome to my course on basic cnc programming for the 2-axis lathe.
This lecture covers the four basic G-codes used in a cnc program that control the motion and direction of the turn tool and creates a tool path that produces the shape of the part being machined.
Any of these G-codes can only be used once in each line or block of motion. Each line or block is a separate move. Once that move is complete the machine control executes the next block producing a continuous smooth motion along the part geometry until all the blocks are read and the tool retracts away from the part.
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These G-codes are modal, which means that once they are active they do not need to be used again in the next block. So when the G1 code is active you do not have to use it again on the next line unless you are needing the use a G2, G3 or G0 (make sure that you use a zero and not a letter 'O' for the G0 command or the control will alarm out).
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Close attention needs to be paid to the plus and minus values of the X and the Z coordinates ensuring the proper direction of the axes.
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- A plus value in X will make the part or geometry larger and minus will make the feature of the part smaller.
- The Z-axis moves towards the chuck in a minus direction and away form the chuck in a positive direction.