How to create a G-Code from a 3d model

General: Create your objects with a surface on Z=0, not layered above. This will set everything to usable g-code pathes.

Create your tools

• Path --> Tool Bit Library editor
• Create Tool bit
• Select a shape that matches your bit. In my case an endmill.
• Save your tool with your own name.
• Double click on your tool in the library list to set details.

Created tools will end up on your file system within your </path/to/tool-library/>/Bits/ Tools that are stored on other places will not be saved when modifying your library.

Create a Job

This job will hold all your operations. On this level you will select the body to work on, the tool to use etc.

• Path --> Job
• Check your body to work on
• "Output" tab: ** Output File: select file name for the generated *.nc output ** Processor: Choose "grbl"
• Setup ** Extend Models Bound Box ** All X/Y/Z values to zero
• Tools tab: ** Add your defined tool ** Remove the default tool ** Edit your tool to set spindle speed, forward moving rate etc. *** In my example:

spindle speed: 9000
horiz. feed rate: 3mm/s
vert. feed rate: 1mm/s

Create a pocket

To create a pocket choose "Path" --> "Pocket Shape". Select the bottom of a to-be-created pocket and click on "add" in the base geometry dialogue.

You need to make sure that depth are fine (stepping is, for whatever reasons, set to tool diameter instead of something that makes sense).

Create a contour

...

Export milling job

Path --> Post Process

The generated file can be used as input for example in Universal G-Code Sender.