3D printing without support at 45 degrees

Recently I needed to print a door for a toy with a cylinder for its part of a hinge. It could not be printed laying flat because of the pattern on one side, and the protruding cylinder on the other. Printing vertically is not ideal either, because the lower adhesion between layers means that the cylinder itself would be prone to breaking.

While printing vertically on its side would be an option (with some support for the cylinder), I decided to experiment slicing the model at and angle, 45 degrees. This turned out to have a lot of advantages: 

  1. The only support needed was a little wedge to prevent the model from falling over (something needed for vertical printing, too) - otherwise since 45-degree overhangs are fine, no supports were needed
  2. The cylinder was sturdier due to its layers having a larger surface area and so more adhesion
  3. The bridges above the holes came out very neat because they were built from a single thread outwards instead of many parallel threads right on the first layer.
I have used this trick successfully in other cases, too, to e.g. print spiky details like claws or teeth where slicing along the spikes was not an option. There, too, the increased surface area of the layers meant more stable prints.


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