Inlet Channel Flow Chart Program Logic
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The document describes the program logic and order of operations for a flow chart that takes an inlet channel and guides it through a series of arcs and channels in both positive and negative directions before exiting through an outlet channel. The end result of the flow chart is G-code designed to work with a LinuxCNC machine controller to simulate the channel path on an AXIS CNC mill.
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Inlet Channel Flow Chart Program Logic
- 8. Inlet Channel Arc (positive direction)
- 9. Inlet Channel Arc (positive direction) Channel (negative Y direction)
- 10. Inlet Channel Arc (positive direction) Channel (negative Y direction) Arc (negative direction)
- 11. Inlet Channel Arc (positive direction) Channel (negative Y direction) Arc (negative direction) Channel (positive Y direction)
- 12. Inlet Channel Arc (positive direction) Channel (negative Y direction) Arc (negative direction) Channel (positive Y direction) Outlet Channel
- 13. Flow Chart Program logic and order of operations
- 14. Final G-Code Designed to work with LinuxCNC machine controller AXIS CNC Mill Simulator
Editor's Notes
- For my project I chose to write a g-code program for a CNC milling operation that uses parameters and subroutines to determine the tool path. This enables the program to be easily adaptable to design changes by editing a few parameters.
- This technique would be useful for prototyping where you might be making a single part and then maybe slightly changing the design, or for a small run job shop where you might be making many similar parts with different dimensions. The machine operator does not need to know g-code, CAD/CAM software to edit the design. The parameters are changed directly from machine controller. Can be made on the fly, saving time, without rewriting g-code.
- I came up with an example part to use this program with. The part is just made up. It is a heat exchange plate. The plate is bolted to a surface and fluid runs through the channel to either heat or cool something like a motor. I thought the repeating pattern of the fluid channel makes it a good example to use for my project.
- The part has four different milling operations to create it. They could all be milled with parameter driven programs, but I chose just to focus on the fluid channel operation for this project.
- I started out planning for the project just by putting some thoughts and sketches on paper trying to figure out what parameters I need to use and how to use those values to calculate the tool path. Six Parameters: read from slide
- Then I broke the operation up into different subroutine Explain inlet channel:
- This is a flow chart showing the logic and organization of how the program should work Go through flow chart: point out While and If statements
- Here is the final g-code. It might be hard to see. but I will go through it in a minute. Point out different sections: I had a pretty good idea of how I would write the program. It works very similarly to any other programming language like C. Since every machine controller might use its own version of commands like calling subroutines, I had a hard time finding a simulator to run my program correctly. I ended up installing linux and running LinuxCNC which is what we used in the ATC lab. I intended on actually milling a part, but I did not have enough time so I tested it by simulating it on LinuxCNC.