Help: parts of the object disappear in preview

[cheapo 1]

Is it something to do with the Tinkercad file? What I can see in Cura's preview vaguely looks like part of the Tinkercad history that you see scrolling through when you re-open the project.

Hmm, can't seem to open the stl file in my text editor, it says something about it being corrupt.

I've re-opened the project twice in Tinkercad, re-started Cura and re-opened the stl, with the same result.

And yes, it prints with bits missing

 

Any help you guys can give I hereby thank you in advance. This project is part of a body mount upgrade for my RC rock crawler.

 

gcode file  included

CE5_Ravine dbm add2(1).gcode

 

 

 

 

Edited April 17, 2021 by cheapo

[GregValiant 886]

Everything runs in streaks...You have some faces flipped around.

 

Go to Service.netfabb.com and create a free account, upload the file, download the repaired file, and load that one into Cura.

[cheapo 1]

Thanx for the reply

Hmm, sounds weird. ok I'll give it a go.

[cheapo 1]

Downloaded my "fixed" file but It has made no difference, Cura still shows the same preview areas missing after slicing.

[cheapo 1]

I'm going to make a new one in Tinkercad, and see how that goes. Another mug of tea is called for!

[cheapo 1]

Nope, that didn't work either, I still get some bits missing, and it's always in the tube sleeves.

 

More strangeness;

 No prob with solid upstands on the model, but when I make a 3mm hole the outer diameter reduces, apparently.

I'm changing my filament from carbon fibre to plain PLA. It's a waste otherwise.

Printing more bits with different bore holes now. Just so i can physically measure any changes.

[cheapo 1]

I've just realized that after slicing, the preview shows an original sized shadow outside the dimensions of the object to print!

All of this by the way, is using standard settings. But going to my custom settings appears to make no difference.

 Now I've just updated Cura, by signing in, but no change.

It's just done even worse with another Tinkercad project. I quickly made two intersecting 6mm tubes, downloaded it, loaded it into Cura, sliced with recommended settings, and preview shows just a shadow of the crossed tubes with just a tiny amount of printed material on the inner surface in a couple of places.

This is definitely weird stuff going on.

[cheapo 1]

Ah, I haven't mentioned that My system is Linux Ubuntu 20.10

 

I'm removing Cura, and will re-upload it

[GregValiant 886]

If you will post the 3mf file I'll take a look.  It does look like a model problem.

[cheapo 1]

What's a 3mf file?

[GregValiant 886]

Go to File | Save Project.  It will create a 3mf file with all your settings, your printer, and the model.  It's the easiest format to troubleshoot.  It's actually the easiest to work with too.  When you save a project then the next time you open it all the support blockers, model files, whatever, are still in place.

[cheapo 1]

Ah, I forgot about that, I'm now back in the "can't open the downloaded Cura file!