Strange, parts disappear in the preview and print mode

[Janet]

Thanks for this suggestion, I did the mesh repair and still the legs disappeared, the best solution was to adjust the wall thickness, the tolerance in S3D is lower than in other software, or to put it the other way, S3D calculates better, and isn't that forgiving. The CAD design has to be spot on. I work in Rhino 3D, what do you use?

I think the issue with the original model of the chair was the fact that the feet were not part of the same mesh as the legs....and as the slicer is not capable of dealing correctly with interlacing but separate meshes by turning the adjoining surfaces of the included overlap into an external face, resulting in an internal void leaving a wall thickness between the void and the outside surface of less than the extrusion thickness...and nothing printed!

If the model is run through the Netfabb online repair surface, then the meshes would be merged ....and the feet would be printed properly.

This is an issue I have all of the time with the CAD software I use. None of the tools in 3DS can help.

[Janet]

Thanks this is the formula I was looking for. That can be of great help evaluating the model.

When your modeling a design for print just keep in mind that any wall has an inner and outer surface. Thats 2 extrusions. Your extrusion width setting is actually what controls if it prints or not so try not to make walls in your parts smaller than the width x2. There is a little fudge factor there because s3d will overlap the inner and outer surfaces to make a thinner wall but there is really only so far it can go. In the advanced tab there is your thin wall overlap setting. With a .4 nozzle avoid walls lass than .8mm

[DarthRevan]

I think the issue with the original model of the chair was the fact that the feet were not part of the same mesh as the legs....and as the slicer is not capable of dealing correctly with interlacing but separate meshes by turning the adjoining surfaces of the included overlap into an external face, resulting in an internal void leaving a wall thickness between the void and the outside surface of less than the extrusion thickness...and nothing printed!

If the model is run through the Netfabb online repair surface, then the meshes would be merged ....and the feet would be printed properly.

This is an issue I have all of the time with the CAD software I use. None of the tools in 3DS can help.

In 3.0 we now have the ability to split interconnected meshes!

Separate Connected Surfaces

separateconnected meshes.png (6.73 KiB) Viewed 2043 times