Project Guides and Tutorials
There are thousands of free projects and plans available on the Instructables website for just about any kind of idea, you can simply browse through their main sections or search for a specific type of project to find plans, schematics, videos, and instructions to build or modify their projects yourself.
Make Magazine Skill Builders
Each of these covers a very specific skill. If you're unfamiliar with a tool, material or process, these are the best way to get the background you need.
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The tabbed box is one of the simplest and most useful things to design for the laser cutter. There are several online applications that will take your input and allow you to download an .svg file that can be incorporated into Inkscape, CorelDraw, or Illustrator. In my view, using an Inkscape extension is by far the easiest way to design your box and make adjustments right in Inkscape itself.
Instructions for Making a Tabbed Box using the Laser Cutter
Download BoxMaker for Inkscape 0.91.zip
Simple online service: MakerCase
The laser cutter can be used to create 3d models by cutting individual thin layers and then stacking them together to create a full size object. This is useful for creating prototypes that may be too large to be 3d printed.
Instructions for Creating Stacked 3d Models using the Laser Cutter
Download AutoDesk 123D Make
Instructions for Transferring SolidWorks Drawings to the Laser Cutter (.pdf)