Why not a straight line? How can i fix it?

[p3d-dev]

Why not a straight line? How can i fix it?

[p3d-dev]

Could you please share the stl/obj file, so we can investigate, if/how this can be achieved ?

[Lukas3704]

How can i share the stl? The format is not supported by GitHub.

[p3d-dev]

If you are ok with this, you can send an email to [email protected]

[Lukas3704]

Ok sure

[p3d-dev]

Thanks for sharing the design. The solid fill material is drawn in parallel lines with every layer being 90° rotated against the previous one. In the case as shown above, a single line would not fill the required space. If a single line is not sufficient, then the parallel lines strategy is chosen. So there will be generated the normal lines being 90° rotated to the previous layer. Obviously, those lines are in that case pretty short. As soon as the line hits the shell, it tries a >90° turn (up direction). As this would lead straight into the shell, it performs more like a 120-150° turn and stops, as it fills that gap. If there would be sufficient space for a 180° turn on the inner side (just like the previous layer), then it would generate a continuous zig-zag line instead of separated short lines.

The need to fill material there, is due to some inner rounding at that corner. The engine cannot choose a single line, because the gap is too wide for a single line. So it chooses the standard parallel lines.

From the human view, this may not make sense. Clearly, the strategy of the engine is somehow limited and there is not much, which can be done in the moment. The engine does not have an overall view on the part, but uses only a couple of strategies. Those are working pretty well, but may be not super optimal in all cases.

One possibility is to increase the shell lines to three or four and eventually increase the line width, so that this specific gap is filled by the shell. The routing strategy of shell lines is to be parallel to the part perimeters. This would come close to what you apparently are looking for.

As a side note: It's fun to open the email on the iPad and send the attachment straight to PrintTo3D for slicing. :-)

[Lukas3704]

Ok thank you! Maybe that's something to work on in future, since cura has variable line withs and therefore fils the gab much more efficient and more pretty aswell. But i still like the slicer since its on an iPad👍.