discuss@lists.openscad.org

OpenSCAD general discussion Mailing-list

View all threads

Hull over a for is squashing everything

RW
Rogier Wolff
Thu, Jul 21, 2022 3:32 PM

On Thu, Jul 21, 2022 at 06:04:40AM -0700, Jordan Brown wrote:

A larger sample, a filial for a curtain rod, yields 176,000 instructions
using a simple infill and 551,000 instructions with a gyroid infill.

That's the simple approach to converting Gcode to SCAD.

Still some "processing" is required. How thick and wide a layer are
you depositing? That's detmined by the previous layer! Some
configuration would be required: For 1mm of extrusion distance, how
much volume of plastic is extruded?

Anyway, To get something realistic, much more processing would need to
be done: recognize outer peripherals and connect the dots. Simplify.

A much more non-trivial job than just assuming a .4 x .2mm extruded box
for every move-with-extrusion.

Roger. 

--
** R.E.Wolff@BitWizard.nl ** https://www.BitWizard.nl/ ** +31-15-2049110 **
**    Delftechpark 11 2628 XJ  Delft, The Netherlands.  KVK: 27239233    **
f equals m times a. When your f is steady, and your m is going down
your a is going up.  -- Chris Hadfield about flying up the space shuttle.

On Thu, Jul 21, 2022 at 06:04:40AM -0700, Jordan Brown wrote: > A larger sample, a filial for a curtain rod, yields 176,000 instructions > using a simple infill and 551,000 instructions with a gyroid infill. That's the simple approach to converting Gcode to SCAD. Still some "processing" is required. How thick and wide a layer are you depositing? That's detmined by the previous layer! Some configuration would be required: For 1mm of extrusion distance, how much volume of plastic is extruded? Anyway, To get something realistic, much more processing would need to be done: recognize outer peripherals and connect the dots. Simplify. A much more non-trivial job than just assuming a .4 x .2mm extruded box for every move-with-extrusion. Roger. -- ** R.E.Wolff@BitWizard.nl ** https://www.BitWizard.nl/ ** +31-15-2049110 ** ** Delftechpark 11 2628 XJ Delft, The Netherlands. KVK: 27239233 ** f equals m times a. When your f is steady, and your m is going down your a is going up. -- Chris Hadfield about flying up the space shuttle.
JB
Jordan Brown
Thu, Jul 21, 2022 4:24 PM

On 7/21/2022 8:32 AM, Rogier Wolff wrote:

Anyway, To get something realistic, much more processing would need to
be done: recognize outer peripherals and connect the dots. Simplify.

A much more non-trivial job than just assuming a .4 x .2mm extruded box
for every move-with-extrusion.

Yes.

It's hard (because of the data volume, but also because of the extrusion
characteristics you describe) to do a naïve job.

It's much harder (because of the need to recognize the overall shape of
the object) to do anything better.

On 7/21/2022 8:32 AM, Rogier Wolff wrote: > Anyway, To get something realistic, much more processing would need to > be done: recognize outer peripherals and connect the dots. Simplify. > > A much more non-trivial job than just assuming a .4 x .2mm extruded box > for every move-with-extrusion. Yes. It's hard (because of the data volume, but also because of the extrusion characteristics you describe) to do a naïve job. It's much harder (because of the need to recognize the overall shape of the object) to do anything better.
NH
nop head
Thu, Jul 21, 2022 4:51 PM

I vaguely remember there is a program to go from gcode to STL but I can't
remember the name or if it is free.

On Thu, 21 Jul 2022 at 17:25, Jordan Brown openscad@jordan.maileater.net
wrote:

On 7/21/2022 8:32 AM, Rogier Wolff wrote:

Anyway, To get something realistic, much more processing would need to
be done: recognize outer peripherals and connect the dots. Simplify.

A much more non-trivial job than just assuming a .4 x .2mm extruded box
for every move-with-extrusion.

Yes.

It's hard (because of the data volume, but also because of the extrusion
characteristics you describe) to do a naïve job.

It's much harder (because of the need to recognize the overall shape of
the object) to do anything better.


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

I vaguely remember there is a program to go from gcode to STL but I can't remember the name or if it is free. On Thu, 21 Jul 2022 at 17:25, Jordan Brown <openscad@jordan.maileater.net> wrote: > On 7/21/2022 8:32 AM, Rogier Wolff wrote: > > Anyway, To get something realistic, much more processing would need to > be done: recognize outer peripherals and connect the dots. Simplify. > > A much more non-trivial job than just assuming a .4 x .2mm extruded box > for every move-with-extrusion. > > > Yes. > > It's hard (because of the data volume, but also because of the extrusion > characteristics you describe) to do a naïve job. > > It's much harder (because of the need to recognize the overall shape of > the object) to do anything better. > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >
L
larry
Thu, Jul 21, 2022 7:12 PM

On Thu, 2022-07-21 at 17:51 +0100, nop head wrote:

I vaguely remember there is a program to go from gcode to STL but I
can't remember the name or if it is free.

Lots of hits on Google. Search "gcode to stl" (with quotes).

On Thu, 2022-07-21 at 17:51 +0100, nop head wrote: > I vaguely remember there is a program to go from gcode to STL but I > can't remember the name or if it is free. Lots of hits on Google. Search "gcode to stl" (with quotes).