3D Modeling for FDM 3D printing

The effect of the use of support material

Not every 3D design is optimized for use in the FDM 3D printing technique. The reason for this is that this technique uses support material to 3D print bridges, some objects can sag and surfaces have a coarser appearance.

This is because the product and support material are separated from each other, which means that certain surfaces and shapes may sag slightly. Of course this is not the case with every shape, common shapes such as holes, spheres and overhangs can react to this.

3D printing overhanging parts

A common problem is that certain parts of a 3D model are not 3D printable if these parts are modeled very thinly. Our FDM machines may not be able to read these sections, or if we print this, the model may become very fragile.

A solution could be to model the overhangs at an angle of maximum 55 °. This ensures that a more even surface is created. If you choose to use a higher angle, the 3D printed material will sag, which can feel rough. Support material must also be used for this, the surface under this support is also somewhat rougher than the normal surface without support material.

Finishing of the overhanging surfaces

The coarser surfaces can be sanded with different grades of sandpaper, it is recommended to start with a coarser version, then finish the surface more smoothly with a finer version. It is also possible to coat and paint the entire 3D print to get the best quality.

Guidelines for 3D modeling for FDM 3D printing

At Formalize we always want to offer the best quality, which is why we have introduced design guidelines per material to ensure quality and to guide every order smoothly and smoothly through our process.

The guidelines can be found on our materials page: https://formalize-am.com/materials.