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Gcodify is a Ruby DSL for more easily hand-writing gcode. When it comes time to make something in the physical world on a mill or lathe, if you don't have a CAD model, then you're going to have to manually write gcode, which is NOT FUN. Even if you do, CAM software is a pain to use, and may be harder to configure than hand-writing gcode. Gcodify makes handwriting gcode fun - forget the look-up of obscure gcode features and just write the things you want made, like cuts, holes, and pockets. Like CAM, but handwritten!

Feature status list

  • DSL (✔)
  • Holes (with a drill-bit in a chuck on the spindle) (✔)
  • Pockets (✘)
  • Facing (✘)
  • Manual gcode entry (✔)


Add this line to your application's Gemfile:

gem 'gcodify'

And then just $ bundle. Or install it yourself:

$ gem install gcodify


Write a new ruby file that requires gcodify:

require 'gcodify'

Tell it that you want a program with certain features:

program = GCodify.program do
    hole :at=>[0, 0], depth=>0.13
puts program.to_gcode # output the program's gcode to stdout

Then run it: $ ruby some_gcodify_script.rb > some_gcodify_script.gcode. You just made a gcode program which makes a hole at the origin!


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.


Bug reports and pull requests are welcome on GitHub at https://github.com/ArchimedesPi/gcodify. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.