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Creation of two key-holders using Inkscape and Freecad

Import the downloaded model from wikipedia

Go to the wikipedia aids page and dl the image of the red ribbon

or

wget https://commons.wikimedia.org/wiki/File:Red_Ribbon.svg?lang=fr#/media/File:World_Aids_Day_Ribbon.png

Open with Inkscape

  1. open Inkscape
  2. Files/Import (Ctrl+i), to import the ribbon file
  3. Select embed (not very important)

Thresholding of the bitmap

  1. Do a right clic on the ribbon and choose "Trace Bitmap"
  2. Change "Detection Mode" to "Brightness cutoff"
  3. Tune the threshold cursor until you got the whole object in black
  4. Clic "apply" button
  5. Move the recently appeared black image near to the original one
  6. Delete the original png

Export for Freecad

  1. Select the object and change his height (H) to 30 mm, (be careful the homothety is locked)
  2. If it's not the case change his position to X=0, Y=0
  3. Select the object and In the "Fill and Stroke" window choose no fill and no stroke
  4. Save the file as 3D-export.svg (Ctrl+s) This export will be used to create the 3D printing model
  5. Restore the fill of the object in the "Fill and Stroke" Window

Extrude with Freecad

Now we will create a second key holder with a 3D printer
  1. open Freecad software
  2. create a new empty Document
  3. import our svg file (Ctrl+Shift+i) or File menu > Import
  4. Choose "svg as geometry"
  5. Change workbench to "Part"
  6. Select the two path objects with the Ctrl key, they are in the tree (left window)
  7. With both selected objects, select in the "Part" menu: boolean, union
  8. Now you got one shape named "Fusion", select it
  9. With both selected objects, select in the "Part" menu: Extrude
  10. In the Task window, set the Length Along to 3 mm
  11. Export the object named "Extrude" (Ctrl+e)
  12. Select the "STL mesh" format for export
  13. Save the file and give it to Fablab Managers with a usb drive!

Create the Key holder

  1. Select the rectangle tool in the left bar
  2. Clic and drag to create a rectangle
  3. Set the dimensions of the rectangle to: W=40, H=23
  4. Remove the fill and set the border of the rectangle
  5. Change the size of the ribbon and place it into the rectangle
  6. With the "Text tool", write your name with the police of your choice
  7. With the "Ellipse/Arc tool", create a circle of diameter 5mm in the corner
  8. Change the fill stroke of the rectangle and the circle to RVB red 255, 0,0
  9. Verify the color of the ribbon is RVB: 0,0,0 (Full Black with no transparency or blur)
  10. Select the text, in "Path" menu, clic on "Object to Path" (it's to avoid the substitution of the police on other systems)
  11. Save the file and give it to Fablab Managers with a usb drive!