Learn 3D Graphics

Blender Compositing

Learn the basics of compositing in Blender.

3D Printers print from the bottom up.

  1. Create a new "general" file in Blender
  2. Delete the lamp and camera
  3. Delete the cube if not using it as a starting point
  • Keep faces to quads (groups of 4 vertices)
  • Make sure the mesh is a closed shape (mani-fold)
    1. Close any gaps by creating faces
    2. Or use the solidy modifer to add thickness (faces themselves have no thickness)
      The example image is missing The example image is missing
      1. In the properties panel, go to the modifiers The example image is missing
      2. Under generate, choose "Solidify" The example image is missing
      3. Increase the thickness value The example image is missing
      4. Apply the modifier in Object mode to actually generate the geometry The example image is missing
  • Avoid areas of exreme overhang (greater than 60°)
  • Avoid overlapping faces

As you are building the mesh, periodically run the "3D Printing Toolbox Checks" to avoid printing issues. Fixing the problems as they occur saves time in the long run.

  1. Non-manifold edges - there are holes in the mesh
  2. Bad Contiguous edges - faces are going opposite directions
    1. In "Edit mode", select all (A)
    2. Recalculate normals (Opt+N | Alt+N) → Recalculate Outside
    3. If there are still faces going different directions, select the problem faces and flip the normals (Opt+N | Alt+N → Flip)
  3. Intersecting faces - faces go through each other
    1. Delete the intersecting faces
    2. Recreate the faces (without intersections) by selecting 4 vertices at a time and using "F" to make each face
    3. Run the check again
  4. Zero Faces - faces are too small
    1. Select the whole mesh and make it larger
    2. Apply the change in scale (CMD|CTRl + A) in Object mode
    3. Run the check again
  5. Zero Edges - edges are too small
    1. Select the whole mesh and make it larger
    2. Apply the change in scale (CMD|CTRl + A) in Object mode
    3. Run the check again
  6. Non-flat faces - probably n-gons
  7. Thin faces
  8. Sharp faces - faces that are too pointy to print as intended
  9. Overhanging faces

For 3D printing, export into the .STL format, which is readable by most 3D printers.

Before runnning the print, the model needs to be "sliced" to divide up the model into printable layers, so that the printer will know how to print the model. Most 3D printers come with their own slicing software.

Mist nodes example is missing
Mist nodes example is missing

Prints can be sent to the printer through the connected desktop or by connecting a thumb drive directly to the printer.

The printer prints with a plastic material called filament. There are two types of filament that the Sindoh printer can use - PLA and ABS. The 2 filament types require different printing temperatures, so it is always important that the printer is told which filament type to use.

Filament can be loaded into the printer with proprietary cartridges. Our specific printer has a special setup to load without the cartridge to allow for a greater variety of filament roll sizes. Either way, only one color can be printed at a time.

To prevent jamming issues, the filament is only loaded before printing and removed when printing is finished.

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Motion blur nodes example is missing

The build plate must be level when printing so that the print adheres properly during the printing process. If the plate is not level, the print may end up sliding around or end up with messy sections due to a lack of expected support. Always run a level check before printing to prevent issues.

  1. Coming Soon
Motion blur nodes example is missing
  1. Coming Soon

Prints should be removed from the printer as soon as possible → sometimes they can stick to the build plate. The print plate should be removed from the printer first and then the model can be scraped up carefully with a thin sturdy instrument such as a palette knife or putty knife.

Before the print plate is returned to the printer, any remaining fillament must be scraped off. The plate should be wiped cleaned with rubbing alcohol. This minimizes adhesion issues for the next print.

To keep the printer running smoothly, filament should not be left loaded in the printer when it is not running.