PETG is a material that has superior layer adhesion to other filaments such as PLA. This makes parts much more resistant, but it can be problematic when configuring the supports. If they are not configured correctly, it can be difficult to remove them. But do not worry, we are going to explain how to configure the supports so that they are easily removed by hand.
The first thing to consider is the separation between the support and the part. With other filaments or when using soluble supports, it is possible to leave a small space between the part and the support. In the case of PETG, we recommend leaving a gap between 90% and 100% of the layer height being used. In addition, it is necessary to disable the interface layers between the support and the part.
As with TPU and materials with high layer adhesion, we must try to ensure that the contact between the support and the part is as low as possible. That is why it is best to use line supports with a low density, in simplify3D around 30%.
Simplify3D also offers configuration options for media cleaning. In this case, the horizontal offset of the part must be set to 0.7 mm. Among the tests carried out, Simplify3D is the slicer that best behaves with the supports for PETG.
Finally, you have to keep the fan speed always over 70%. This is very important as it will cool the material before it can stick to the backing.