Category Archives: DXF Cutting

DXF File from OS DEM Data (3 colour)

1 Open QGIS with OS DEM data loaded

2 QGIS->Raster->Extraction->Clipper  save area as new file (.tif)

3 QGIS new project, drag in the .tif

4 Select the tif (DEM) data and then QGIS->Raster->Extraction->Contours

5 Select the new contours file and right click Properties. Instead of Single Symbol select rule-based.  Load in the 3 colour contour rule.

6 Save as DXF (use correct scaling)

Creating DXF laser cut paths from Sketchup

A) Using a plugin

Import the plugin using Sketchup->Preferences->Extensions->Install Extensions.  There is a warning so import at your own peril (I imported the plugin and then manually opened the .rbz file with a text editor and checked the code for any potential dubious file activities, it looked clean).

For laser cutter, needs to have the components lying flat on the floor, i.e. view from above or below and export using “lines”.

B) The manual way (slow and buggy) :

Put Sketchup into View->Face Style->WIREFRAME

Select the component(s) and create one large component.

1) Select the component and use the plugin Edit->Component->TF Make Shop Drawings to output a shop drawing style sketchup page. Save and open the drawings file


2) Select the required component, select Camera->Standard View->Left/Top/Bottom etc to get a face on view

File->Export->2D Graphic (TIFF image)

Screen Shot 2014-10-11 at 15.56.37

In Inkscape create a new file and File->Import the TIFF file.

Select the object and Path->Trace Bitmap using (untick Smooth unless you need it):

Screen Shot 2014-10-11 at 16.11.16

Select the Fill tool and Fill in black (black fill and black stroke width 1mm)

Screen Shot 2014-10-11 at 18.20.43

Save the file as a dxf (Didn’t use default LWPOLYLINE) :Screen Shot 2014-10-11 at 16.00.09Screen Shot 2014-10-11 at 16.02.29

Ready for opening with LaserCut 5.3 (objects will need to be resized).