MIDILLI G-Code Generator for CNC Routers

MIDILLI G-Code Generator is a free and versatile command-line tool for creating G-Codes files to prepare box-shaped parts. It supports circular drill holes, rectangular cutouts, and precise dimensions in metric units. The generated G-code files are compatible with CNC routers supporting GRBL, ensuring seamless design preparation.

Derived from the in-house MIDILLI Tech Automation Suite, this tool is a simplified yet robust solution.

It is offered free for non-commercial use. You can find the full license details here.

Please choose a topic from below to read.

Features

• Box Creation:
  • Generate rectangular shapes with up to six sides to form a complete box structures.
  • Option to omit any side during box design.
  • Option to use the sizing for the inner volume or the outer volume.
• Customizable Cutouts:
  • Create holes or rectangular cutouts (also called components) on specific sides of the box with precise locations.
  • Create screw holes on top or bottom^* side with the given screw diameter.
• Component Rotation:
  • Rotate components to any specified angle.
• Recess Support:
  • Create flush surfaces with custom dimensions that prevent movement of e.g., button caps and improve functionality.
  • Create recesses for screw heads^*.
• Bit Diameter Compensation:
  • Compensate the bit diameter to create exactly the specified drill holes/cutouts.
  • Straight and V-shaped bits are supported.
• Feedrate:
  • Set feedrate for movement on axes.
• Layered Outputs:
  • Separate component, recess, outline layers’ outputs to only perform a single step at a time.
• Material Thickness:
  • Adjust material thickness for accurate cuts and fits.
• Box Sizing:
  • Automatically adjust box sizes for inner or outer edges, depending on user preference.

_{* Using recess for screws on bottom side requires manual flipping of the surface.}

How does it work?

The tool takes a JSON file as input (example below) and generates G-Codes for up to six sides of a box, with each side containing its own drill cutouts, recesses, and engravings. These pieces can then be assembled to construct a 3D shape.

The exported .nc files must be sent/executed with a G-Code sender e.g., Candle (free and open-source) to complete the task.

Warning: Operating CNC routers requires a safe environment to prevent exposure to dust, debris, and high-speed moving parts. Never place your hands near moving parts. Always ensure proper ventilation, wear safety goggles, and use hearing protection. Additionally, perform a simulation to ensure the final G-code does not attempt to drill or move into restricted and/or dangerous sections.

Download

By downloading our free software, you agree to the license conditions.

Windows 64-Bit Download

Version History

• 1.2.1 (08.02.2025)
  • Replaced height with length in JSON to avoid confusion.
• 1.2.0 (06.02.2025)
  • V-shaped endmill type added for automatic compensation.
• 1.1.0 (26.01.2025):
  • Separation of feedrate for x-, y-, and z-axes for more control on speeds.
    • Removed --feedrate argument.
  • Minor bug fixes.
• 1.0.0 (22.01.2025):
  • Initial version.