libgcode

A scala library to parse, transform, and print g-code files

Status

I just started on that. For the moment, it just parses and prints basic g-code files. There are limitations to the kind of gcode can be parsed/represented. Currently, modal commands not supported. See "ToDo" below for more details.

Using libgcode with Jupyter

This is the way I'm currently using it.

1. install Jupyter
2. install Almond
3. run sbt publishLocal in this folder
4. open the file notebook/samples.ipynb in Jupyter to see examples

ToDo

Better support of modal commands

TL;DR it works better if the commands start with G, M, or O. Use Empty when the command is not specified.

When I started this, I was only looking at g-code from 3D printer slicer. They all followed the restriction above so I incorrectly assumed it was like that. Later, when I started to play with CNC routers I learned about modal commands (e.g. a line to set the feed without any motion command, not repeating G1).

Extractors

Some more extractors for commands. For instance:

• case G(1, params) => ....
• case G(1.5, X(var1) :: remainingParams ) => ....
• ...

Examples of Transformers/Transducers

A few sample classes of g-code transformers:

• remove comments
• sanitization / well-formedness check
• change unit (inch to mm and return)
• scale, translate, rotate
• circular motion to segments (given a maximal acceptable error)

Abstract Machine

have an abstract machine to simulate the code, i.e., get the state of the machine at any point in time.

Extend the abstract machine to

• estimate machining time
• keep track of
  • spindle: off | clockwise | counter-clockwise (RPM?)
  • coolant: off | mist | flood
  • ? cutter radius compensation
  • ? tool length offset
  • ? extruder(s) feedrate/position
  • ? value of other parameters