In the Fill Tab click the X – no paint box and on the Stroke Style tab set the width to that of the bit you are using – 1.5mm, subsequent rectangles will be in the same style, other shapes will need to be setup this way too. Draw a rectangle, Right mouse click on the rectangle and select Fill and Stroke…. The lines you draw will need to be the same width as the bit you are using in the CNC machine.
On Windows: C:\Users\ \AppData\Roaming\inkscape\templates On Linux and OS X: ~/.config/inkscape/templates/ You can save this as a template, such as: CNC3018.svg or as the document default with: default.svg by saving the file to your templates directory: Inkscape Document Propertiesīy default Inkscape scales the stroke/line width when you resize a shape, to prevent this click the the fourth box from the right in the top icon bar “when scaling objects, scale the stroke width by the same proportion” Turn Line Scaling off to prevent the line width changing when resizing Back on your main page, turn the page grid on with: View > Page Grid. In the Grids Tab set the Grid Units to mm and the Spacing X and Spacing Y to 1.0. From the Inkscape menu go to File > Properties and in the Page Tab set the Display Units (millimeters in my case), the Orientation to Landscape and Page Size width: 300 and height: 180. With a new drawing set your Document Size, this should be the same as your CNC bed, in my case this is 300 x 180mm.
This post focuses on setting up Inkscape for the CNC machine and producing the g-code from your drawing, it is not intended to be an Inkscape tutorial. These notes are based around my cheap CNC machine sold as an CNC3018 by a variety of Chinese manufacturers on Amazon and eBay, the included controller is a Woodpecker CNC board (Ardunio clone) I have upgraded to GRBL v1.1 and I am using version 0.92.4 (April 2019) of Inkscape with the included Gcodetools.
While Inkscape doesn’t have many of the functions of proper CAD/CAM software it is an relatively easy place to start for creating basic designs, I have been using it to make boxes out of 3.5mm plywood. Inkscape is a free vector graphics editor for all major platforms, generally it is aimed at art and design users but it does have an option for generating G-Code for use in your favourite CNC software.
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