Hollow .stl generated as .gcode with a blocking layer
 

Hollow .stl generated as .gcode with a blocking layer  

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kenneth.b9
(@kenneth-b9)
Active Member

I’ve got an apparent problem with PrusaSlicer.  Starting with an .stl file that

is intended/designed to be a hollow curved tube, and looks hollow both with F5
and F6 rendering in OpenSCAD, PrusaSlicer generates .gcode that contains
a level layer blocking the tube (i.e. it is no longer hollow).
 
Background:
OS X
Using OpenSCAD 2019.05
          PrusaSlicer-2.2.0+
 
When I import the .stl into PrusaSlicer, it initially looks hollow.
But after slicing, one end of the tube (the end with the wider
diameter) is blocked with a solid layer.  The blockage is apparent
in the visual rendering of the .gcode, and when I actually try to print
it out.
 
The .stl file can be seen here:
 
The .gcode can be seen here:
 
In PrusaSlicer, using File > Repair STL file…
does not seem to help (unless I’m somehow misunderstanding how to use it).
 
What’s my next step?
 
Thanks,
 
Ken
Posted : 17/07/2020 10:09 pm
joan.t
(@joantabb)
Veteran Member Moderator

Hi Ken,

you seem to have attached  links for two copies of the Gcode and No STL...

Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 18/07/2020 12:10 am
Karl Herbert
(@karl-herbert)
Famed Member
Posted by: @kenneth-b9

I’ve got an apparent problem with PrusaSlicer.  Starting with an .stl file that

is intended/designed to be a hollow curved tube, and looks hollow both with F5
and F6 rendering in OpenSCAD, PrusaSlicer generates .gcode that contains
a level layer blocking the tube (i.e. it is no longer hollow).
 
Background:
OS X
Using OpenSCAD 2019.05
          PrusaSlicer-2.2.0+
 
When I import the .stl into PrusaSlicer, it initially looks hollow.
But after slicing, one end of the tube (the end with the wider
diameter) is blocked with a solid layer.  The blockage is apparent
in the visual rendering of the .gcode, and when I actually try to print
it out.
 
The .stl file can be seen here:
 
The .gcode can be seen here:
 
In PrusaSlicer, using File > Repair STL file…
does not seem to help (unless I’m somehow misunderstanding how to use it).
 
What’s my next step?
 
Thanks,
 
Ken

Try to repair yout STL file with one of these tools:

https://all3dp.com/1/stl-repair-stl-file-online-checker-fix-3d-model/

I'm working with netfabb (Autodesk account required).

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 18/07/2020 12:34 am
jsw
 jsw
(@jsw)
Prominent Member

Meshlab is also a good .STL file repair tool.  Kind of a Swiss Army Knife of corrections.

Posted : 18/07/2020 1:41 am
kenneth.b9
(@kenneth-b9)
Active Member

Sorry.   I gave two pointers to the .gcode file.  The .stl file can be seen at

 

https://www.dropbox.com/s/7gymekmcv4dan1s/sopsaxbow.stl?dl=0

 

Ken

Posted : 18/07/2020 2:17 am
Karl Herbert
(@karl-herbert)
Famed Member

@jsw

I totally agree, but it won't run on my laptop with an internal graphics card (Intel HD 3000); tested with version 2020.07. netfabb has the advantage that it can be used online.

This post was modified 3 months ago by Karl Herbert
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 18/07/2020 2:35 am
kenneth.b9
(@kenneth-b9)
Active Member

Hah!  I had assumed naively that the .stl was OK, and that the problem was with the generation of .gcode.

However, the online Netfabb fixed the .stl file, and now everything looks great.  Can't wait to print it.  

Many thanks to all who responded!

Ken

Posted : 18/07/2020 3:38 am
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