Bug Cura tree support generate in air

[wdq4587 0]

Cura  version:  4.11

Model: Porco Rosso

thingiverse ID: 4871593

Scale: 70%

Picture is layer 113 to 114

 

Tree support is great, but not work this time......

Thanks!

[GregValiant 397]

That's a nice model.  It leaves no question as to why they were called flying boats.  I have to wonder why the designer left it in one piece instead of making it a glue together assembly.  Unless you are able to use PVA it will be tough to get the support out without breaking the struts and stays.

 

You need to play with the settings for Tree Support.  I thought it looked better with the Tree Support Branch Distance at 0.5.  Maybe someone else has a better take on it.  I'll attach a 3mf anyway.

GV_porco_rosso.3mf

[wdq4587 0]

I hate glue. But this post is not about discuss this. My problem is some tree support generated floating in air with nothing below or around. A FDM 3D printer can not print this way, even in space station with zero G. I attach my 3mf file. But using your 3mf file rotate 75 degree I also get same result.

porco_rosso 2.3mf

[GregValiant 397]

With the Support at 0% density there is no internal structure for the upper portions to build on.  It is just an outer wall.

With the Support Density at 15% and the Support Branch Distance at .5 I don't see a problem.

You have the Support Interface Density at 100%.  I thought 60% looked better and will likely come off easier.

Here is todays try...

GVPoccoRosso2.3mf

[wdq4587 0]

Thank you very much for your guidance!  But what I report is I think the tree support generation algorithm has bug. It should not generate such floating structure anyway, because it is a support. Although I know the tree support function is not stable. That's why need we report bugs.

 

BTW, I found Cura also did not display warning for such slicer result of the normal model. I mean some parts are printed in the air with nothing below or around. Manually inspection takes a lot of time. I suggest at least use some color to display such areas.