https://github.com/purge12/g-code-visualisation-using-python

A script that will sketch the shapes made by G-codes used in CNC machines using Python using python's turtle and regular expressions (re) library.
https://github.com/purge12/g-code-visualisation-using-python

g-codes python turtle-graphics

Last synced: 11 days ago
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A script that will sketch the shapes made by G-codes used in CNC machines using Python using python's turtle and regular expressions (re) library.

• Host: GitHub
• URL: https://github.com/purge12/g-code-visualisation-using-python
• Owner: pUrGe12
• Created: 2023-12-09T08:22:53.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2023-12-12T07:39:10.000Z (about 2 years ago)
• Last Synced: 2025-01-19T18:16:59.811Z (12 months ago)
• Topics: g-codes, python, turtle-graphics
• Language: Python
• Homepage:
• Size: 47.9 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.txt

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README

          
Project: to visualise G-codes used by CNC machines using python.

Aim is to trace the shape given by the G-code commands. Hence, I will skip over the Z axis line codes, and ignore the M-codes related to spindle movements and cutting.

The speed of the movements defined by G00 and G01 will be predefined and variable depending on user.

Preassumtions:

1. G17 (XY plane) unless G18 or G19 specified.

2. G40 --> cancel cutter compensation (since we are only tracing)

3. G64 --> continous path mode (tolerance may be specified)

The G-codes taken into consideration are:

1. G00 --> rapid move from (x,y) to (x+x0, y+y0), may not be a straight line motion (goto specific position while not sketching)

2. G01 --> controlled move from (x,y) to (x+x0, y+y0), straight line motion

3. G02 --> clockwise curve

4. G03 --> anti-clockwise curve

5. G21 --> metric mode

6. G20 --> imperial mode 

7. G90 --> absolute distancing

8. G91 --> incremental distancing

9. G94 --> feed rate in inches/mm per min

10. G53 --> machine coordinates

11. G54 --> coordinate system

12. G64 --> specify tolerance (P)

Note: Since machine configuration, kinematics and control systems are unknown, I will be assuming the G00 command to be the same as G01 command, i.e. a straight line motion. (Not that it would matter anyway, since G00 is for positioning) 

The M-codes and letter codes taken into consideration are:

1. M0 --> pause machine

2. M2 --> end program

3. M30 --> end program and loop to first line

4. R --> radius in G02 and G03

5. X --> x coordinate specification

6. Y --> y coordinate specification

7. N --> line number

8. I --> radius specification for a circle

The libraries used in python are turtle, re (regular expressions) and math. Note, for the code to run, you need the turtle library.

To install turtle use:

  $pip install turtle

on the command prompt, or linux terminal.