Designing For Plastic 3D Printing


Note: Legacy documentation is no longer being updated. For up to date instructions, see our Desktop Series support articles.

 

3D printing lets you break most of the rules in traditional manufacturing processes, but there are a few guidelines that will help you optimize parts for this process.  

 

  • A flat base provides good adhesion to the print bed.
  • Use chamfers to connect overhangs to the base of the part(Note the tabs on this part print without support structures. The middle flange also has a 45 deg chamfer).
  • Use default infill settings.

 

Organic Shapes

 

  • Use chamfers on the base of the part to print without supports. (45 deg or less)
  • Fillets work great on top of the part.

 

 

Teardrop Shapes

Here's a detailed, cross-section view of the nacelle. Notice the internal wire channel. 

 

  • The teardrop shape is achieved with:
    • Flat bottom (for good bed adhesion)
    • 70 degree chamfer for the overhang (45 degree would print fine, but stall the airflow in quad copter).
    • Full round (fillet) for the top.
  • The internal wire channel has a 45 degree chamfer on top to close the cavity without supports.
  • Chamfer on the bottom of the wire channel to give wall thickness to the part, and increase strength. 

 

 

A few notes on Infill.

  • Eiger defaults to triangular type Fill Pattern due to the increased speed capabilities of triangular paths and the very little effect on part strength.
  • To achieve 100% infill (solid plastic), it is recommended to use rectangular Fill Patterns.