Empathy List Archives

K

Kevig

Thu, May 14, 2020 10:58 AM

Hello everyone,

first let me introduce myself.
I am Henk, 57 years young.
I am building a boat, 6 meter long and designing it completely in openscad.
When finished, I use a CNC machine to cut out the parts.
First scale 1:10 (on a 3018 cnc machine), later real size. (on a maslov cnc
machine)

Now the thing.
Because I have a lot of parts, all with a lot of calculations, it slows down
my machine.
My solution seemed simple: export finished parts as STL, then replace the
code with the imported STL.
And it worked, partially, a bit, a little bit.
The imported parts couldn’t import or didn’t show when renderd.
On this forum I found the “perfect” stl problem, so I fixed the stl files
with polyfix (nice), freescad and blender.
And then the weird stuff started.
All of the Stl files imported fine, they all rendered fine.
But when I imported more than 1 stl and tried to render them, none showed
up.
So I created a program with just 4 import commands and activated them one by
one.
And I got strange outcomings.
1 – worked
1-2 worked
1-2-3 1 disappeared, 2 and 3 visible
1-2-4 all disappeared,
3 – worked
1-4 4 disappeared, 1 visible
Then with a second try, all outcomings changed.
Also when a stl disappears, it stay away and I have to restart openscad to
make it visible again.
In the preview it works fine.
I got 32Gb, I7, gtx 1650S, win 10, so a heavy machine.
Anyone a clue what’s wrong?

Also,
Has anyone experience with the BOSL2 library?, is it stable with openscad?

Rgrds
Henk

--
Sent from: http://forum.openscad.org/

Hello everyone, first let me introduce myself. I am Henk, 57 years young. I am building a boat, 6 meter long and designing it completely in openscad. When finished, I use a CNC machine to cut out the parts. First scale 1:10 (on a 3018 cnc machine), later real size. (on a maslov cnc machine) Now the thing. Because I have a lot of parts, all with a lot of calculations, it slows down my machine. My solution seemed simple: export finished parts as STL, then replace the code with the imported STL. And it worked, partially, a bit, a little bit. The imported parts couldn’t import or didn’t show when renderd. On this forum I found the “perfect” stl problem, so I fixed the stl files with polyfix (nice), freescad and blender. And then the weird stuff started. All of the Stl files imported fine, they all rendered fine. But when I imported more than 1 stl and tried to render them, none showed up. So I created a program with just 4 import commands and activated them one by one. And I got strange outcomings. 1 – worked 1-2 worked 1-2-3 1 disappeared, 2 and 3 visible 1-2-4 all disappeared, 3 – worked 1-4 4 disappeared, 1 visible Then with a second try, all outcomings changed. Also when a stl disappears, it stay away and I have to restart openscad to make it visible again. In the preview it works fine. I got 32Gb, I7, gtx 1650S, win 10, so a heavy machine. Anyone a clue what’s wrong? Also, Has anyone experience with the BOSL2 library?, is it stable with openscad? Rgrds Henk -- Sent from: http://forum.openscad.org/

TP

Torsten Paul

Thu, May 14, 2020 11:17 AM

On 14.05.20 12:58, Kevig wrote:

I am building a boat, 6 meter long and designing it completely
in openscad. When finished, I use a CNC machine to cut out the
parts. First scale 1:10 (on a 3018 cnc machine), later real
size. (on a maslov cnc machine)

Uff, wow, nice! Please post pictures :-).

My solution seemed simple: export finished parts as STL, then
replace the code with the imported STL.

STL is especially bad for that due to how the file format is
structured. I would have immediately suggested using 3MF but
there's a bug in the release version (just fixed last week)
that can cause cavities to disappear. So you could give it a
try if none of the parts has internal cavities (which I assume
might be the case if it's for a CNC?).

There is currently a project started that covers on-disk
caching. I suppose that would be the best solution. So
crossing fingers that goes as planned.
(That's the "Help me in choosing the perfect key-value
datastore for persistent cache (GSOC 2020)" forum thread)

Also when a stl disappears, it stay away and I have to
restart openscad to make it visible again.

This sounds like an old bug that should not happen anymore
with the latest release. Which OpenSCAD version is it?

ciao,
Torsten.

On 14.05.20 12:58, Kevig wrote: > I am building a boat, 6 meter long and designing it completely > in openscad. When finished, I use a CNC machine to cut out the > parts. First scale 1:10 (on a 3018 cnc machine), later real > size. (on a maslov cnc machine) Uff, wow, nice! Please post pictures :-). > My solution seemed simple: export finished parts as STL, then > replace the code with the imported STL. STL is especially bad for that due to how the file format is structured. I would have immediately suggested using 3MF but there's a bug in the release version (just fixed last week) that can cause cavities to disappear. So you could give it a try if none of the parts has internal cavities (which I assume might be the case if it's for a CNC?). There is currently a project started that covers on-disk caching. I suppose that would be the best solution. So crossing fingers that goes as planned. (That's the "Help me in choosing the perfect key-value datastore for persistent cache (GSOC 2020)" forum thread) > Also when a stl disappears, it stay away and I have to > restart openscad to make it visible again. This sounds like an old bug that should not happen anymore with the latest release. Which OpenSCAD version is it? ciao, Torsten.

K

Kevig

Thu, May 14, 2020 11:50 AM

@Torsten.
I am using 2019-5. (tried 2020-4, but it crashed).

I will try the 3mf suggestion, and you are right, no cavities in my design.

also a picture of my boat, without hull.
http://forum.openscad.org/file/t2834/sparky.jpg

and the goal(not exactly, somewhat like this)
http://forum.openscad.org/file/t2834/Gerestaureerde-loodsjol.jpg

rgrds
Henk

--
Sent from: http://forum.openscad.org/

@Torsten. I am using 2019-5. (tried 2020-4, but it crashed). I will try the 3mf suggestion, and you are right, no cavities in my design. also a picture of my boat, without hull. <http://forum.openscad.org/file/t2834/sparky.jpg> and the goal(not exactly, somewhat like this) <http://forum.openscad.org/file/t2834/Gerestaureerde-loodsjol.jpg> rgrds Henk -- Sent from: http://forum.openscad.org/

NH

nop head

Thu, May 14, 2020 12:17 PM

It should be possible to get OpenSCAD to model a design like that in a
reasonable time. It looks like most of the parts are 2D, in which case
model them in 2D and use linear_extrude. It would then render almost
instantly.

I model assemblies with thousands of parts and never have to save them as
STLs and reload them. I use render() to cache any 3D parts.

On Thu, 14 May 2020 at 12:51, Kevig Kevigsp@hotmail.com wrote:

@Torsten.
I am using 2019-5. (tried 2020-4, but it crashed).

I will try the 3mf suggestion, and you are right, no cavities in my design.

also a picture of my boat, without hull.
http://forum.openscad.org/file/t2834/sparky.jpg

and the goal(not exactly, somewhat like this)
http://forum.openscad.org/file/t2834/Gerestaureerde-loodsjol.jpg

rgrds
Henk

--
Sent from: http://forum.openscad.org/

OpenSCAD mailing list
Discuss@lists.openscad.org
http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org

It should be possible to get OpenSCAD to model a design like that in a reasonable time. It looks like most of the parts are 2D, in which case model them in 2D and use linear_extrude. It would then render almost instantly. I model assemblies with thousands of parts and never have to save them as STLs and reload them. I use render() to cache any 3D parts. On Thu, 14 May 2020 at 12:51, Kevig <Kevigsp@hotmail.com> wrote: > @Torsten. > I am using 2019-5. (tried 2020-4, but it crashed). > > I will try the 3mf suggestion, and you are right, no cavities in my design. > > also a picture of my boat, without hull. > <http://forum.openscad.org/file/t2834/sparky.jpg> > > and the goal(not exactly, somewhat like this) > <http://forum.openscad.org/file/t2834/Gerestaureerde-loodsjol.jpg> > > rgrds > Henk > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

A

adrianv

Thu, May 14, 2020 2:17 PM

The BOSL2 library is NOT stable. It is still very dynamic, under rapid
development. It is also supported and in its current stage you have the
opportunity to try things out and recommend radical (e.g. non backwards
compatible) changes before things settle down.

--
Sent from: http://forum.openscad.org/

The BOSL2 library is NOT stable. It is still very dynamic, under rapid development. It is also supported and in its current stage you have the opportunity to try things out and recommend radical (e.g. non backwards compatible) changes before things settle down. -- Sent from: http://forum.openscad.org/

A

arnholm@arnholm.org

Thu, May 14, 2020 3:10 PM

On 2020-05-14 12:58, Kevig wrote:

My solution seemed simple: export finished parts as STL, then replace
the
code with the imported STL.
And it worked, partially, a bit, a little bit.
The imported parts couldn’t import or didn’t show when renderd.
On this forum I found the “perfect” stl problem, so I fixed the stl
files
with polyfix (nice), freescad and blender.
And then the weird stuff started.
All of the Stl files imported fine, they all rendered fine.
But when I imported more than 1 stl and tried to render them, none
showed
up.

Hello Henk,

Did you render with F6 in OpenSCAD?

An alternative to importing STL is to store the parts as 2D DXF or SVG
and import them as such + immediately use linear_extrude to the required
thickness. That is assuming all your parts are flat. Not sure if it
solves the problem, but maybe. At least it is necessary to find the
cause of the problem you are seeing, or else it might happen again.

Carsten Arnholm

On 2020-05-14 12:58, Kevig wrote: > My solution seemed simple: export finished parts as STL, then replace > the > code with the imported STL. > And it worked, partially, a bit, a little bit. > The imported parts couldn’t import or didn’t show when renderd. > On this forum I found the “perfect” stl problem, so I fixed the stl > files > with polyfix (nice), freescad and blender. > And then the weird stuff started. > All of the Stl files imported fine, they all rendered fine. > But when I imported more than 1 stl and tried to render them, none > showed > up. Hello Henk, Did you render with F6 in OpenSCAD? An alternative to importing STL is to store the parts as 2D DXF or SVG and import them as such + immediately use linear_extrude to the required thickness. That is assuming all your parts are flat. Not sure if it solves the problem, but maybe. At least it is necessary to find the cause of the problem you are seeing, or else it might happen again. Carsten Arnholm

K

Kevig

Thu, May 14, 2020 4:45 PM

@nophead and Carsten

yes i did render with F6
I did use the possibility of SVG and extract to get the rib's and keel from
the drawing to a 3d model.
Unfortunally almost every part has angled, curved or round sides (see
picture)
(A future problem wil be to find a free slicer program, capable of creating
grbl g-code for these sides.)
http://forum.openscad.org/file/t2834/spant-10.jpg

@adrianv

thanks,
Then this library is not for me.
If i change just one part of the boat, everything has to be recalculated.
A missing or failing command will crash the boat and possible openscad, not
to mention the efford to repair the danage.

@all
As soon as i have results from the 3MF option, i let you know

rgrds
Henk

--
Sent from: http://forum.openscad.org/

@nophead and Carsten yes i did render with F6 I did use the possibility of SVG and extract to get the rib's and keel from the drawing to a 3d model. Unfortunally almost every part has angled, curved or round sides (see picture) (A future problem wil be to find a free slicer program, capable of creating grbl g-code for these sides.) <http://forum.openscad.org/file/t2834/spant-10.jpg> @adrianv thanks, Then this library is not for me. If i change just one part of the boat, everything has to be recalculated. A missing or failing command will crash the boat and possible openscad, not to mention the efford to repair the danage. @all As soon as i have results from the 3MF option, i let you know rgrds Henk -- Sent from: http://forum.openscad.org/

K

Kevig

Sat, May 16, 2020 3:52 PM

hello,

As promised the results of the 3MF experiment.
short version - no difference, same behavier

long version
i used 2 rib's of the boat Rib2 and rib3.
both renderd fine (F6) and imported fine.(no errors or warnings)
but when imported together and renderd none showed up.
when only one of both where imported and renderd with the rest of the boat
it didn't show up but the rest of the boat did.
when both where imported and renderd with the rest of the boat nothing
showed up.
when both are stored as one file (renderd together and exported as 1 3MF
file) it went fine.
When this (double) file was imported and renderd with the rest of the boat
nothing showed up
so??????????

tomorrow i am going to try it with 2 simple objects (2 cubes) and see what
happens

rgrds
Henk

--
Sent from: http://forum.openscad.org/

hello, As promised the results of the 3MF experiment. short version - no difference, same behavier long version i used 2 rib's of the boat Rib2 and rib3. both renderd fine (F6) and imported fine.(no errors or warnings) but when imported together and renderd none showed up. when only one of both where imported and renderd with the rest of the boat it didn't show up but the rest of the boat did. when both where imported and renderd with the rest of the boat nothing showed up. when both are stored as one file (renderd together and exported as 1 3MF file) it went fine. When this (double) file was imported and renderd with the rest of the boat nothing showed up so?????????? tomorrow i am going to try it with 2 simple objects (2 cubes) and see what happens rgrds Henk -- Sent from: http://forum.openscad.org/

TP

Torsten Paul

Sat, May 16, 2020 3:58 PM

On 16.05.20 17:52, Kevig wrote:

i used 2 rib's of the boat Rib2 and rib3.
both renderd fine (F6) and imported fine.(no errors or warnings)

Is it possible to share those 2 files?

ciao,
Torsten.

On 16.05.20 17:52, Kevig wrote: > i used 2 rib's of the boat Rib2 and rib3. > both renderd fine (F6) and imported fine.(no errors or warnings) Is it possible to share those 2 files? ciao, Torsten.

K

Kevig

Sat, May 16, 2020 4:41 PM

of course Torsten.

Boot_Spant_2.3mf http://forum.openscad.org/file/t2834/Boot_Spant_2.3mf
Boot_Spant_3.3mf http://forum.openscad.org/file/t2834/Boot_Spant_3.3mf
Boot_Spant_23.3mf http://forum.openscad.org/file/t2834/Boot_Spant_23.3mf

rgrds
Henk

--
Sent from: http://forum.openscad.org/

of course Torsten. Boot_Spant_2.3mf <http://forum.openscad.org/file/t2834/Boot_Spant_2.3mf> Boot_Spant_3.3mf <http://forum.openscad.org/file/t2834/Boot_Spant_3.3mf> Boot_Spant_23.3mf <http://forum.openscad.org/file/t2834/Boot_Spant_23.3mf> rgrds Henk -- Sent from: http://forum.openscad.org/

discuss@lists.openscad.org

Import Stl files (again, but different) and BOSL2