Curves are printing in segments and not a single curve

[Rowland_2009 0]

Hello,

 

I'm designing and printing curved marble tracks; the curved pieces are split into tiny segments, and the segments are rotated along the curve and raised tiny bit (vide first image.) Each piece is symmetrical to mimic an almost perfect curve (vide second image.) I'm using Tinkecad to design the curve.

 

For some reason the walls of the track only print in segments and not make a long curve (vide third, fourth, and fifth image.) Is there a way to print the wall without printing each segment one at a time, but print in a long curve and thus get rid of extra time and the vertical streaks on the walls?

 

Thanks.

[gr5 2,234]

Is this a tinkercad question or a slicer question?  Search on youtube for how to create a "lobster in tinkercad".  This will give you a more continuous curve.  It will still have segments but maybe it will be better.

 

Cura doesn't do "curves".  It receives an STL file and STL files don't define curves.  So all you can do is smaller line segments.  If you go too small, the firmware may slow down.

 

the firmware should not slow down for gentle curves like in your image.  But if you have too many line segments (> 16) over the distance of only 1 mm then the printer will indeed slow down because it has to always be ready to stop within the next 16 line segments (feature of Marlin firmware - not as much of a problem with Klipper firmware).

 

When you have line segments as in your image above, Marlin will not need to slow down.  It does not stop at each "corner".

[GregValiant 1,355]

Part of this is a design thing.  If you are building the declination angle into each part then you are going to get more odd effects than if you design the entire part flat and then angle it in the assembly.

I don't know TinkerCad, but in AutoCad, building the angle in can be done by "lofting".  Loft features and helical features are very complex, but usually as smooth as the conversion from CAD to STL can make it.

I have to say though - that is a very odd looking slice.

 

These are the same model.  One exported from CAD at high resolution and the other at low resolution.  They are both made up of facets.

Edited December 22, 2023 by GregValiant