Cura cutting off the bottom of my model

[patfre 1]

So i found a model online of the spaceX starship and for some reason half the engines on the bottom are gone after the slice on the solid view it is still there but the hole model is pushed down. I have no idea why it does this any help is appreciatet.

 

I have included a picture of the solid view and a layer view of it and i've also included the model itself.

 

Using Ultimaker Cura 4.6.2

superheavy_ridged_gridded.stl

[gr5 2,192]

There's two possibilities:

1) Something wrong with the model.

2) Z setting isn't at zero.

 

#2 is trivial to fix.  Click on the model and on the left side there are some tools - click on the move tool and it shows the position of the model in x,y,z.  Make sure z is zero.

 

#1 - more likely the problem.  

 

Cura has an amazing plugin to test your model to see if something is wrong with it and can repair a very few of the many potential problems:
In the upper right corner of Cura click "marketplace" and make sure you are on the "plugins" tab and install "Mesh Tools".  Then restart Cura.  Now right click on your model, choose "mesh tools" and first choose
"check mesh", then "fix model normals" and "fix simple holes" to see if that helps.  Cura doesn't fix most issues so...

netfabb free repair service is here (you have to create a free account first):
https://service.netfabb.com/login.php

Here's another service - drag and drop mesh repair service:
https://3d-print.jomatik.de/en/index.php

Some people recommend tinkercad - it's free - you import your stl into tinkercad and then export it to a new stl and tinkercad will fix many issues.

[patfre 1]

9 minutes ago, gr5 said:

There's two possibilities:

1) Something wrong with the model.

2) Z setting isn't at zero.

 

#2 is trivial to fix.  Click on the model and on the left side there are some tools - click on the move tool and it shows the position of the model in x,y,z.  Make sure z is zero.

 

#1 - more likely the problem.  

 

Cura has an amazing plugin to test your model to see if something is wrong with it and can repair a very few of the many potential problems:
In the upper right corner of Cura click "marketplace" and make sure you are on the "plugins" tab and install "Mesh Tools".  Then restart Cura.  Now right click on your model, choose "mesh tools" and first choose
"check mesh", then "fix model normals" and "fix simple holes" to see if that helps.  Cura doesn't fix most issues so...

netfabb free repair service is here (you have to create a free account first):
https://service.netfabb.com/login.php

Here's another service - drag and drop mesh repair service:
https://3d-print.jomatik.de/en/index.php

Some people recommend tinkercad - it's free - you import your stl into tinkercad and then export it to a new stl and tinkercad will fix many issues.

So i've done all the things you mentioned and still the same issues exists

[gr5 2,192]

Please post your project.  Do "file" "save..." and post here the resulting file.  It will contain the model, your machine settings, your profile, your settings overrides, how you positioned the model, etc.

[gr5 2,192]

Oh it could be that the walls of those nozzles is too thin to print.  Try setting the line width to 0.1mm to see if that helps and if it does then check "print thin walls".  Although I don't think this is the issue as it wouldn't lower the model - it would just skip some layers.

[patfre 1]

 

Quote

Please post your project.  Do "file" "save..." and post here the resulting file.  It will contain the model, your machine settings, your profile, your settings overrides, how you positioned the model, etc.

CE3PRO_superheavy_ridged_gridded.3mf

Edited January 29, 2021 by patfre

[patfre 1]

10 minutes ago, gr5 said:

"print thin walls"

So i just tried that and well it does fix the cutting off the bottom but now the line for the bottom is super super ugly

[gr5 2,192]

Well you could try the new alpha version of cura which has some new "thin wall" features but the only person I know who tried it said his thin walls were no better in alpha.  Instead try the burtoogle version of cura which I personally find does really well with thin walls.  Also note that these might look a little better in real life than in PREVIEW mode (just a little).

 

https://github.com/smartavionics/Cura/releases

 

[gr5 2,192]

Also try smaller line widths.  Usually you can go down to 75% of nozzle diameter without losing much quality (barely noticable).  So if you have a 0.4mm nozzle then try 0.3mm for line width.  If that slices then increase that until it stops and go back to the max possible line width that still slices okay.

[patfre 1]

12 minutes ago, gr5 said:

Also note that these might look a little better in real life than in PREVIEW mode (just a little).

So i am just going to print it then i might just have to look bad

[GregValiant 1,316]

Did you ever print this?  

[Kazymandias 0]

I want to note that I just had the bottom layer, of a drawer that I was printing, not show up in the print or preview for a completely different reason:

 

Despite it being six layers (.2 resolution) thick, when I used Exclusive as my slicing tolerance, there is no bottom layer.

 

 

In Middle or Inclusive, the bottom of the drawer works fine.

I have no idea why, though. 

 

Any ideas?