GRBL CNC command sender, autoleveler, g-code editor, digitizer, CAM and swiss army knife for all your CNC needs.

An advanced fully featured g-code sender for GRBL. bCNC is a cross platform program (Windows, Linux, Mac) written in python. The sender is robust and fast able to work nicely with old or slow hardware like Rasperry PI (As it was validated by the GRBL mainter on heavy testing).

Please note that all pull requests should pass the Travis-CI build in order to get merged. Most pull requests should also pass Codefactor checks if there is not good reason for failure.

This is how you install (or upgrade) bCNC along with all required packages. You can use any of these commands (you need only one):

pip2 install --upgrade bCNC
pip2 install --upgrade git+https://github.com/vlachoudis/bCNC
pip2 install . #in git directory
python2 -m pip install --upgrade bCNC

This is how you launch bCNC:

python2 -m bCNC

Only problem with this approach is that it might not install tkinter in some cases. So please keep that in mind and make sure it's installed in case of problems.

If you run the python2 -m bCNC command in root directory of this git repository it will launch the git version. Every developer should always use this to launch bCNC to ensure that his/her code will work after packaging.

Note that on WindowsXP you have to use pyserial==3.0.1 or older as newer version do not work on XP.

PyPI project: https://pypi.org/project/bCNC/

You will need the following packages to run bCNC

• tkinter the graphical toolkit for python Depending your python/OS it can either be already installed, or under the names tkinter, python-tkinter, python-tk
• pyserial or under the name python-serial, python-pyserial
• numpy
• Optionally:
• python-imaging-tk: the PIL libraries for autolevel height map
• python-opencv: for webcam streaming on web pendant
• scipy: for 100 times faster 3D mesh slicing

Expand the directory or download it from github and run the bCNC command

• Copy bCNC subdirectory of this repo to /usr/lib/python2.7/site-packages/
• Launch using python2 -m bCNC or install bCNC.sh to /usr/bin
• Alternatively you can fetch the bCNC Python package using pip when building Linux package
  • refer to your distro, eg.: https://wiki.archlinux.org/index.php/Python_package_guidelines
  • Py2deb to build Debian package from Python package: https://pypi.org/project/py2deb/

Note that you might probably find some precompiled .exe files on github "releases" page: https://github.com/vlachoudis/bCNC/releases But they might not be up to date.

This is basic example of how to compile bCNC to .exe file. (given that you have working bCNC in the first place, eg. using pip install bCNC). Go to the directory where is your bCNC installed and do the following:

pip2 install pyinstaller
pyinstaller --onefile --distpath . --hidden-import tkinter --paths lib;plugins;controllers --icon bCNC.ico --name bCNC __main__.py

This will take a minute or two. But in the end it should create bCNC.exe. Also note that there is make-exe.bat file which will do just that for you. This will also create rather large "build" subdirectory. That is solely for caching purposes and you should delete it before redistributing!

If you are going to report bugs in .exe version of bCNC, please check first if that bug occurs even when running directly in python (without .exe build).

You can modify most of the parameters from the "Tools -> Machine" page. Only the changes/differences from the default configuration file will be saved in your home directory ${HOME}/.bCNC or ~/.bCNC

The default configuration is stored on bCNC.ini in the installation directory.

PLEASE DO NOT CHANGE THIS FILE, IT'S GOING TO BE OVERWRITEN ON EACH UPGRADE OF BCNC

• simple and intuitive interface for small screens
• import/export g-code, dxf and svg files
• 3D mesh slicing stl and ply files
• fast g-code sender (works nicely on RPi and old hardware)
• workspace configuration (G54..G59 commands)
• user configurable buttons
• g-code function evaluation with run time expansion
• feed override during the running for fine tuning
• Easy probing:
  • simple probing
  • center finder with a probing ring
  • auto leveling, Z-probing and auto leveling by altering the g-code during sending (or permanently autoleveling the g-code file).
  • height color map display
  • create g-code by joging and recording points (can even use camera for this)
  • manual tool change expansion and automatic tool length probing
  • canned cycles expansion
• Various Tools:
  • user configurable database of materials, endmills, stock
  • properties database of materials, stock, end mills etc..
  • basic CAM features (profiling, pocketing, drilling, flat/helical/ramp cutting, thread milling, cutout tabs, drag knife)
  • User g-code plugins:
    • bowl generator
    • finger joint box generator
    • simple spur gear generator
    • spirograph generator
    • surface flatten
    • play melody from MIDI file using stepper motor frequency
    • ...
• G-Code editor and display
  • graphical display of the g-code, and workspace
  • graphically moving and editing g-code
  • reordering code and rapid motion optimization
  • moving, rotating, mirroring the g-code
• Web pendant to be used via smart phones

You can log serial communication by changing the port to something like:

spy:///dev/ttyUSB0?file=serial_log.txt&raw
spy://COM1?file=serial_log.txt&raw

If a file isn't specified, the log is written to stderr. The 'raw' option outputs the data directly, instead of creating a hex dump. Further documentation is available at: https://pyserial.readthedocs.io/en/latest/url_handlers.html#spy

The software is made available "AS IS". It seems quite stable, but it is in an early stage of development. Hence there should be plenty of bugs not yet spotted. Please use/try it with care, I don't want to be liable if it causes any damage :)