Designing for 3D printing

• Dimension vertical holes 0.4mm bigger
• Experiment with “Horizontal expansion” in Cura. Use negative values when the outer dimensions of parts are too big.
• Clearance (guidance values. Need tuning for different machines, materials and temperatures).
  • 0.15mm: snug friction fit
  • 0.20mm: able to slide easily
• Print slower (±30mm/s) for better accuracy. In Cura there's an 'engineering' print profile (only available for Ultimaker S5) that tunes parameters for best dimensional accuracy.

Weird work-around

The problem edges show up in red.

Zoom in on one of the edges.

Right-click on the edge, and select Display control frame

A brown dotted line shows the control points. Select one of these points and delete it.

In the lower left corner of the screen, right-click on the yellow sketch icon and select Review warning to check if it is solved or not.