T
trygve@totallytrygve.com
Thu, Nov 21, 2024 2:41 PM
Hi!
I have an Ender 3 MAXX.
Yeah, big build platform, and a single Z-axis motor. I've been battling elephants foot on it for a while.
(I've had that issue the entire time, but now I have some prints that won't work with that. )
On tuesday I measured the frame...
It was 1mm wider on top than at the bottom.
It's pretty much impossible to get it perfect.
And the X-axis?
I can only get the inner wheel on the non-motorized side to touch the rail, The two on the outer side aren't really adjustable.
And the wheels on the motor side isn't supposed to be adjustable, either.
What you learn with an ender is how to fix printers yourself...
I may have to find my Dremel...
So I'm prepping my old WanHao i3 v1.something for the task instead.
That one has a DiiiCooler(because the original cooling fan and shroud is crap) Z-axis braces and replacement brackets for the Y-axis...
Worked flawlessly for years, but is slow.
Trygve
Den 21. november 2024 kl. 15.04.03 +01.00 skrev gene heskett via Discuss discuss@lists.openscad.org:
On 11/21/24 06:57, Leonard Martin Struttmann via Discuss wrote:
Yeah, that's what I was afraid of.
Gene: I started out with an Ender 3. A great machine to learn on and to modify, but don't expect much help from Creality.
Hi!
I have an Ender 3 MAXX.
Yeah, big build platform, and a single Z-axis motor. I've been battling elephants foot on it for a while.
(I've had that issue the entire time, but now I have some prints that won't work with that. )
On tuesday I measured the frame...
It was 1mm wider on top than at the bottom.
It's pretty much impossible to get it perfect.
And the X-axis?
I can only get the inner wheel on the non-motorized side to touch the rail, The two on the outer side aren't really adjustable.
And the wheels on the motor side isn't supposed to be adjustable, either.
What you learn with an ender is how to fix printers yourself...
I may have to find my Dremel...
So I'm prepping my old WanHao i3 v1.something for the task instead.
That one has a DiiiCooler(because the original cooling fan and shroud is crap) Z-axis braces and replacement brackets for the Y-axis...
Worked flawlessly for years, but is slow.
Trygve
Den 21. november 2024 kl. 15.04.03 +01.00 skrev gene heskett via Discuss <discuss@lists.openscad.org>:
> On 11/21/24 06:57, Leonard Martin Struttmann via Discuss wrote:
>
> > Yeah, that's what I was afraid of.
> > Gene: I started out with an Ender 3. A great machine to learn on and to modify, but don't expect much help from Creality.
> >
RW
Rogier Wolff
Thu, Nov 21, 2024 2:48 PM
On Thu, Nov 21, 2024 at 09:04:03AM -0500, gene heskett via Discuss wrote:
So did I, in fact I still have it, non-functional. So I bought the ender 5
plus, first thing that broke was the plastic lever arm of the frame mounted
I have "left-to-right" (in my browser tabs and in my view physically
as well): An Anet A6, A tronxy (I don't know the model, the
build-plate is 330x330 and before I mounted a thing or two it
should've been 430 vertical.) a Creality S1 Plus and a 2D foam
cutter. All Octoprint. The first non-RPI now reports: "New version
available, shall I upgrade?" and then fails the upgrade, so I'm
sticking to octopi for now. Two run klipper.
The tronxy now has a "direct extruder", so there is now an extruder
motor moving along the X axis. Might slow things down, but I've got it
tuned to be slightly faster than the ender. I'm not really optimizing
for speed.
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.
** 'a' for accelleration.
On Thu, Nov 21, 2024 at 09:04:03AM -0500, gene heskett via Discuss wrote:
> So did I, in fact I still have it, non-functional. So I bought the ender 5
> plus, first thing that broke was the plastic lever arm of the frame mounted
I have "left-to-right" (in my browser tabs and in my view physically
as well): An Anet A6, A tronxy (I don't know the model, the
build-plate is 330x330 and before I mounted a thing or two it
should've been 430 vertical.) a Creality S1 Plus and a 2D foam
cutter. All Octoprint. The first non-RPI now reports: "New version
available, shall I upgrade?" and then fails the upgrade, so I'm
sticking to octopi for now. Two run klipper.
The tronxy now has a "direct extruder", so there is now an extruder
motor moving along the X axis. Might slow things down, but I've got it
tuned to be slightly faster than the ender. I'm not really optimizing
for speed.
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.
** 'a' for accelleration.
LM
Leonard Martin Struttmann
Thu, Nov 21, 2024 2:52 PM
Right now, the Miraco Pro is on sale for $1,199.00. Very tempting. Will
talk it over with my partner.
On Thu, Nov 21, 2024 at 8:27 AM Jon Bondy via Discuss <
discuss@lists.openscad.org> wrote:
The Miraco was $1,300, but they reduced it to $1,000 when they announced
the Miraco Pro (which does not appear to add much, to my eyes).
On 11/21/2024 9:10 AM, gene heskett via Discuss wrote:
On 11/21/24 07:37, Jon Bondy via Discuss wrote:
I have had a variety of Creality and RevoPoint 3D scanners, mostly as
a result of KickStarter campaigns, where I got "deals". None of them
were satisfactory for my purposes. They require that you keep the
scanner at a somewhat fixed distance from the object being scanned,
and they show this with a display on your computer, to which you
attach the scanner. You can either look at the scanner and object, or
the screen, but not both, and that is very frustrating. I even asked
a friend to monitor the screen while I tried to scan (shouting out
"closer!" "back!") and that was too frustrating for both of us. I
tried using a tripod and rotating the objects with a black back
drop. I tried adding colored dots. I tried Photogrammetry. None of
it would work reliably.
I bought the RevoPoint Miraco, and then I sold all of my other
scanners. It is expensive, but it is all-in-one: scanner, display,
processor. It uses structured light, so there is no need for dots
(although I spray shiny objects with foot powder). You can see the
closeness display while you are scanning, so it is easy to keep the
scanner at the right distance. I use single shot mode, where each
press of the button takes a picture, rather than video mode. It is
much easier to discard a single scan if the scanner gets confused
about sync with the object. And you can import the point clouds to
your computer (via WiFi) and then use other tools to finish the
processing, including RevoPoint's Revo Scan software. I have scanned
two sides of an object and then merged the point clouds using
CloudCompare. All of this under Windows.
Highly recommended, if you can afford it.
But you didn't mention a ball park price. That would have been
helpful. Thank you for pointing it out Jon.
Jon
On 11/20/2024 10:50 PM, Leonard Martin Struttmann via Discuss wrote:
I am considering getting one of the Creality 3D scanners. Has
anyone here used one and imported the resulting STLs into OpenSCAD?
Are they usable in OpenSCAD?
I build electronics projects and typically hand-build 3D models of
the PCBs, displays, etc., to help design the cases. I would truly
love to be able to merely scan them and import them into the case
design.
Thanks! Len
OpenSCAD mailing list
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Cheers, Gene Heskett, CET.
Right now, the Miraco Pro is on sale for $1,199.00. Very tempting. Will
talk it over with my partner.
On Thu, Nov 21, 2024 at 8:27 AM Jon Bondy via Discuss <
discuss@lists.openscad.org> wrote:
> The Miraco was $1,300, but they reduced it to $1,000 when they announced
> the Miraco Pro (which does not appear to add much, to my eyes).
>
>
> On 11/21/2024 9:10 AM, gene heskett via Discuss wrote:
> > On 11/21/24 07:37, Jon Bondy via Discuss wrote:
> >> I have had a variety of Creality and RevoPoint 3D scanners, mostly as
> >> a result of KickStarter campaigns, where I got "deals". None of them
> >> were satisfactory for my purposes. They require that you keep the
> >> scanner at a somewhat fixed distance from the object being scanned,
> >> and they show this with a display on your computer, to which you
> >> attach the scanner. You can either look at the scanner and object, or
> >> the screen, but not both, and that is very frustrating. I even asked
> >> a friend to monitor the screen while I tried to scan (shouting out
> >> "closer!" "back!") and that was too frustrating for both of us. I
> >> tried using a tripod and rotating the objects with a black back
> >> drop. I tried adding colored dots. I tried Photogrammetry. None of
> >> it would work reliably.
> >>
> >> I bought the RevoPoint Miraco, and then I sold all of my other
> >> scanners. It is expensive, but it is all-in-one: scanner, display,
> >> processor. It uses structured light, so there is no need for dots
> >> (although I spray shiny objects with foot powder). You can see the
> >> closeness display while you are scanning, so it is easy to keep the
> >> scanner at the right distance. I use single shot mode, where each
> >> press of the button takes a picture, rather than video mode. It is
> >> much easier to discard a single scan if the scanner gets confused
> >> about sync with the object. And you can import the point clouds to
> >> your computer (via WiFi) and then use other tools to finish the
> >> processing, including RevoPoint's Revo Scan software. I have scanned
> >> two sides of an object and then merged the point clouds using
> >> CloudCompare. All of this under Windows.
> >>
> >> Highly recommended, if you can afford it.
> >
> > But you didn't mention a ball park price. That would have been
> > helpful. Thank you for pointing it out Jon.
> >>
> >> Jon
> >>
> >>
> >> On 11/20/2024 10:50 PM, Leonard Martin Struttmann via Discuss wrote:
> >>> I am considering getting one of the Creality 3D scanners. Has
> >>> anyone here used one and imported the resulting STLs into OpenSCAD?
> >>> Are they usable in OpenSCAD?
> >>>
> >>> I build electronics projects and typically hand-build 3D models of
> >>> the PCBs, displays, etc., to help design the cases. I would truly
> >>> love to be able to merely scan them and import them into the case
> >>> design.
> >>>
> >>> Thanks! Len
> >>>
> >>> _______________________________________________
> >>> OpenSCAD mailing list
> >>> To unsubscribe send an email todiscuss-leave@lists.openscad.org
> >>
> >> <http://www.avg.com/email-signature?
> >> utm_medium=email&utm_source=link&utm_campaign=sig-
> >> email&utm_content=emailclient> Virus-free.www.avg.com <http://
> >> www.avg.com/email-signature?
> >> utm_medium=email&utm_source=link&utm_campaign=sig-
> >> email&utm_content=emailclient>
> >>
> >> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
> >>
> >> _______________________________________________
> >> OpenSCAD mailing list
> >> To unsubscribe send an email to discuss-leave@lists.openscad.org
> >
> >
> > Cheers, Gene Heskett, CET.
>
> --
> This email has been checked for viruses by AVG antivirus software.
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> _______________________________________________
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> To unsubscribe send an email to discuss-leave@lists.openscad.org
>
JB
Jon Bondy
Thu, Nov 21, 2024 2:58 PM
I am confused. What does this have to do with 3D Scanners?
On 11/21/2024 9:41 AM, Gadgetman! via Discuss wrote:
Hi!
I have an Ender 3 MAXX.
Yeah, big build platform, and a single Z-axis motor. I've been
battling elephants foot on it for a while.
(I've had that issue the entire time, but now I have some prints that
won't work with that. )
On tuesday I measured the frame...
It was 1mm wider on top than at the bottom.
It's pretty much impossible to get it perfect.
And the X-axis?
I can only get the inner wheel on the non-motorized side to touch the
rail, The two on the outer side aren't really adjustable.
And the wheels on the motor side isn't supposed to be adjustable, either.
What you learn with an ender is how to fix printers yourself...
I may have to find my Dremel...
So I'm prepping my old WanHao i3 v1.something for the task instead.
That one has a DiiiCooler(because the original cooling fan and shroud
is crap) Z-axis braces and replacement brackets for the Y-axis...
Worked flawlessly for years, but is slow.
Trygve
Den 21. november 2024 kl. 15.04.03 +01.00 skrev gene heskett via
Discuss discuss@lists.openscad.org:
On 11/21/24 06:57, Leonard Martin Struttmann via Discuss wrote:
Yeah, that's what I was afraid of.
Gene: I started out with an Ender 3. A great machine to learn on
and to modify, but don't expect much help from Creality.
--
This email has been checked for viruses by AVG antivirus software.
www.avg.com
I am confused. What does this have to do with 3D Scanners?
On 11/21/2024 9:41 AM, Gadgetman! via Discuss wrote:
> Hi!
>
> I have an Ender 3 MAXX.
>
> Yeah, big build platform, and a single Z-axis motor. I've been
> battling elephants foot on it for a while.
> (I've had that issue the entire time, but now I have some prints that
> won't work with that. )
>
> On tuesday I measured the frame...
> It was 1mm wider on top than at the bottom.
> It's pretty much impossible to get it perfect.
> And the X-axis?
> I can only get the inner wheel on the non-motorized side to touch the
> rail, The two on the outer side aren't really adjustable.
> And the wheels on the motor side isn't supposed to be adjustable, either.
>
> What you learn with an ender is how to fix printers yourself...
>
> I may have to find my Dremel...
>
>
>
> So I'm prepping my old WanHao i3 v1.something for the task instead.
> That one has a DiiiCooler(because the original cooling fan and shroud
> is crap) Z-axis braces and replacement brackets for the Y-axis...
> Worked flawlessly for years, but is slow.
>
>
> Trygve
>
>
> Den 21. november 2024 kl. 15.04.03 +01.00 skrev gene heskett via
> Discuss <discuss@lists.openscad.org>:
>> On 11/21/24 06:57, Leonard Martin Struttmann via Discuss wrote:
>>
>> Yeah, that's what I was afraid of.
>> Gene: I started out with an Ender 3. A great machine to learn on
>> and to modify, but don't expect much help from Creality.
>>
>
>
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email todiscuss-leave@lists.openscad.org
--
This email has been checked for viruses by AVG antivirus software.
www.avg.com
RW
Rogier Wolff
Thu, Nov 21, 2024 3:00 PM
On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
It might be possible to convert the point cloud into voxels, convert
the voxel into a mesh, and do some post-processing on the mesh. If
the target features are cube like (flat surfaces, right angles,
etc.), this may work well.
I suspect this (the post-processing) is still a PHD level research
project to "do it right". For a human it is trivially easy to
recognize: Oh, that's supposed to be a flat surface, and that other
thing is a smooth curve.
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.
** 'a' for accelleration.
On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
> It might be possible to convert the point cloud into voxels, convert
> the voxel into a mesh, and do some post-processing on the mesh. If
> the target features are cube like (flat surfaces, right angles,
> etc.), this may work well.
I suspect this (the post-processing) is still a PHD level research
project to "do it right". For a human it is trivially easy to
recognize: Oh, that's supposed to be a flat surface, and that other
thing is a smooth curve.
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.
** 'a' for accelleration.
HW
Harvey white
Thu, Nov 21, 2024 3:03 PM
You can also write a program that does much the same in C++ for EAGLE (I
have 7.7). Currently undergoing a rewrite of the parser, though.
Does individual parts and assemblies, different board colors, etc.
Lets you know what it doesn't know.
Harvey
On 11/21/2024 5:05 AM, nop head via Discuss wrote:
I model all the PCBs I use in OpenSCAD. I don't always do all the
components but I do the ones that affect the enclosure. If the PCB is
open source in a Kicad compatible format I can get the component
positions from that, otherwise I measure it with calipers.
image.png
On Thu, 21 Nov 2024 at 09:54, Raymond West via Discuss
discuss@lists.openscad.org wrote:
I bought the ferret pro, about a year ago. I have not had time to
practice very much in using it. The stls are full of holes. For
pcbs, when I was into that. I'd use an ordinary document flat bed
scanner. It gets the outline pretty exact, and it is easy enough
to get the height of individual components.
I'm not sure if much improvement has been made in the past year or
so, with the creality stuff, but it was a very much a case of
practice in using it, and the software had plenty of room for
improvement. If I get time, I'll find a pcb, and spend a few
minutes scanning it, and show you the results.
On 21/11/2024 03:50, Leonard Martin Struttmann via Discuss wrote:
I am considering getting one of the Creality 3D scanners. Has
anyone here used one and imported the resulting STLs into
OpenSCAD? Are they usable in OpenSCAD?
I build electronics projects and typically hand-build 3D models
of the PCBs, displays, etc., to help design the cases. I would
truly love to be able to merely scan them and import them into
the case design.
Thanks! Len
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email todiscuss-leave@lists.openscad.org
_______________________________________________
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
You can also write a program that does much the same in C++ for EAGLE (I
have 7.7). Currently undergoing a rewrite of the parser, though.
Does individual parts and assemblies, different board colors, etc.
Lets you know what it doesn't know.
Harvey
On 11/21/2024 5:05 AM, nop head via Discuss wrote:
> I model all the PCBs I use in OpenSCAD. I don't always do all the
> components but I do the ones that affect the enclosure. If the PCB is
> open source in a Kicad compatible format I can get the component
> positions from that, otherwise I measure it with calipers.
>
> image.png
>
> On Thu, 21 Nov 2024 at 09:54, Raymond West via Discuss
> <discuss@lists.openscad.org> wrote:
>
> I bought the ferret pro, about a year ago. I have not had time to
> practice very much in using it. The stls are full of holes. For
> pcbs, when I was into that. I'd use an ordinary document flat bed
> scanner. It gets the outline pretty exact, and it is easy enough
> to get the height of individual components.
>
> I'm not sure if much improvement has been made in the past year or
> so, with the creality stuff, but it was a very much a case of
> practice in using it, and the software had plenty of room for
> improvement. If I get time, I'll find a pcb, and spend a few
> minutes scanning it, and show you the results.
>
> On 21/11/2024 03:50, Leonard Martin Struttmann via Discuss wrote:
>> I am considering getting one of the Creality 3D scanners. Has
>> anyone here used one and imported the resulting STLs into
>> OpenSCAD? Are they usable in OpenSCAD?
>>
>> I build electronics projects and typically hand-build 3D models
>> of the PCBs, displays, etc., to help design the cases. I would
>> truly love to be able to merely scan them and import them into
>> the case design.
>>
>> Thanks! Len
>>
>> _______________________________________________
>> OpenSCAD mailing list
>> To unsubscribe send an email todiscuss-leave@lists.openscad.org
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org
>
>
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org
RW
Raymond West
Thu, Nov 21, 2024 5:01 PM
If you can get somewhere to test various scanners, or get on 'sale or
return', then I don't think you would buy the creality gear. The ferret
comes in a nice case, seems to be well thought out, the software
interface looks nice, but in fact it is only 'a polished turd'. I've
just attempted four scans of a raspberry pi. None worked in any fashion
that would be useful. The software goes through various steps, and
generates an .obj file from the initial point cloud. That takes some
time. At the end, you end up with something, from which you can just
discern the object, mainly because a coloured photo is mapped over the
surface, and it will need a lot of repairs/post processing. I have a
70MB .obj file, that openscad will not open - it says WARNING: Index
P:/Docs/openscad/t3.obj out of range in Line 2243791
In meshlab, it shows as an unrecognisable grey blob.
Possibly, If I spent a few more weeks practising, made a
turntable/scanning rig/whatever, then it may produce something more
useful, but it is just not worth the effort. For printed circuit boards,
for the purpose of designing cases, then mine or Nophead's methods are
far quicker, and more accurate.
The other aspect, is many of the cheap scanners do not handle black or
shiny parts too well, which occur on most pcbs. If you want it for
scanning people or pets, hair is a problem. Vehicles, you'll need
something else.
Hope I've not put you off. 😕
On 21/11/2024 11:53, Leonard Martin Struttmann via Discuss wrote:
Raymond: Yes, the ferret is what I am/was looking at. I look forward
to seeing something that you've scanned.
If you can get somewhere to test various scanners, or get on 'sale or
return', then I don't think you would buy the creality gear. The ferret
comes in a nice case, seems to be well thought out, the software
interface looks nice, but in fact it is only 'a polished turd'. I've
just attempted four scans of a raspberry pi. None worked in any fashion
that would be useful. The software goes through various steps, and
generates an .obj file from the initial point cloud. That takes some
time. At the end, you end up with something, from which you can just
discern the object, mainly because a coloured photo is mapped over the
surface, and it will need a lot of repairs/post processing. I have a
70MB .obj file, that openscad will not open - it says WARNING: Index
P:/Docs/openscad/t3.obj out of range in Line 2243791
In meshlab, it shows as an unrecognisable grey blob.
Possibly, If I spent a few more weeks practising, made a
turntable/scanning rig/whatever, then it may produce something more
useful, but it is just not worth the effort. For printed circuit boards,
for the purpose of designing cases, then mine or Nophead's methods are
far quicker, and more accurate.
The other aspect, is many of the cheap scanners do not handle black or
shiny parts too well, which occur on most pcbs. If you want it for
scanning people or pets, hair is a problem. Vehicles, you'll need
something else.
Hope I've not put you off. 😕
On 21/11/2024 11:53, Leonard Martin Struttmann via Discuss wrote:
> Raymond: Yes, the ferret is what I am/was looking at. I look forward
> to seeing something that you've scanned.
LM
Leonard Martin Struttmann
Fri, Nov 22, 2024 4:08 AM
Roger, you are probably right, but, <sarcasm> isn't that the unspoken
promise of AI? To relieve us humans of the burden of doing these things
ourselves? </sarcasm> Who knows?
In any event, I ordered a Miraco Pro today. I will report back here after
I've had some time to play with it.
Thanks! Len
On Thu, Nov 21, 2024 at 9:26 PM Rogier Wolff via Discuss <
discuss@lists.openscad.org> wrote:
On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
It might be possible to convert the point cloud into voxels, convert
the voxel into a mesh, and do some post-processing on the mesh. If
the target features are cube like (flat surfaces, right angles,
etc.), this may work well.
I suspect this (the post-processing) is still a PHD level research
project to "do it right". For a human it is trivially easy to
recognize: Oh, that's supposed to be a flat surface, and that other
thing is a smooth curve.
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.
** 'a' for accelleration.
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
Roger, you are probably right, but, <sarcasm> isn't that the unspoken
promise of AI? To relieve us humans of the burden of doing these things
ourselves? </sarcasm> Who knows?
In any event, I ordered a Miraco Pro today. I will report back here after
I've had some time to play with it.
Thanks! Len
On Thu, Nov 21, 2024 at 9:26 PM Rogier Wolff via Discuss <
discuss@lists.openscad.org> wrote:
> On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
>
> > It might be possible to convert the point cloud into voxels, convert
> > the voxel into a mesh, and do some post-processing on the mesh. If
> > the target features are cube like (flat surfaces, right angles,
> > etc.), this may work well.
>
> I suspect this (the post-processing) is still a PHD level research
> project to "do it right". For a human it is trivially easy to
> recognize: Oh, that's supposed to be a flat surface, and that other
> thing is a smooth curve.
>
> 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.
> ** 'a' for accelleration.
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org
>
P
pca006132
Fri, Nov 22, 2024 4:48 AM
There is no right answer to this sort of postprocessing, only heuristics.
If you assume the ground truth are mostly flat surfaces, it is possible to
fill in small holes, voxels make it easier to do this kind of operations
because you won't get invalid meshes from it. It can be far from the ground
truth, but it can never be invalid geometry.
And I'm not saying it is easy to recognize in software that the input is a
flat surface or smooth curve, this is difficult. What I am saying is if you
assume the target is like this, you can write heuristics to target it.
State-of-the-art mesh reconstruction from scanned data often requires both
point-cloud as well as visual data. With visual data it is easier to figure
out continuous surfaces, given the lighting condition is good. But even
with all these, it can still be hard to obtain a full scan when your input
have valleys, and it may require stiching multiple scans together. In that
case, the visual information can help as well by locating feature points
using computer vision methods. There are PhDs and companies working on
this, but they target more general cases and have very different
requirements.
Re. PhD level research, a lot of issues important to openscad users are
like that. Good mesh simplification, mesh repair to recover manifoldness
and remove overlaps, faster mesh offset, generic ways to implement fillet.
There are literatures out there, but a lot of them are missing details, or
are problematic in some ways. It is not like PhD level research is
something much harder than our regular development...
On Fri, Nov 22, 2024 at 12:09 PM Leonard Martin Struttmann via Discuss <
discuss@lists.openscad.org> wrote:
Roger, you are probably right, but, <sarcasm> isn't that the unspoken
promise of AI? To relieve us humans of the burden of doing these things
ourselves? </sarcasm> Who knows?
In any event, I ordered a Miraco Pro today. I will report back here
after I've had some time to play with it.
Thanks! Len
On Thu, Nov 21, 2024 at 9:26 PM Rogier Wolff via Discuss <
discuss@lists.openscad.org> wrote:
On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
It might be possible to convert the point cloud into voxels, convert
the voxel into a mesh, and do some post-processing on the mesh. If
the target features are cube like (flat surfaces, right angles,
etc.), this may work well.
I suspect this (the post-processing) is still a PHD level research
project to "do it right". For a human it is trivially easy to
recognize: Oh, that's supposed to be a flat surface, and that other
thing is a smooth curve.
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.
** 'a' for accelleration.
OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org
There is no right answer to this sort of postprocessing, only heuristics.
If you assume the ground truth are mostly flat surfaces, it is possible to
fill in small holes, voxels make it easier to do this kind of operations
because you won't get invalid meshes from it. It can be far from the ground
truth, but it can never be invalid geometry.
And I'm not saying it is easy to recognize in software that the input is a
flat surface or smooth curve, this is difficult. What I am saying is if you
assume the target is like this, you can write heuristics to target it.
State-of-the-art mesh reconstruction from scanned data often requires both
point-cloud as well as visual data. With visual data it is easier to figure
out continuous surfaces, given the lighting condition is good. But even
with all these, it can still be hard to obtain a full scan when your input
have valleys, and it may require stiching multiple scans together. In that
case, the visual information can help as well by locating feature points
using computer vision methods. There are PhDs and companies working on
this, but they target more general cases and have very different
requirements.
Re. PhD level research, a lot of issues important to openscad users are
like that. Good mesh simplification, mesh repair to recover manifoldness
and remove overlaps, faster mesh offset, generic ways to implement fillet.
There are literatures out there, but a lot of them are missing details, or
are problematic in some ways. It is not like PhD level research is
something much harder than our regular development...
On Fri, Nov 22, 2024 at 12:09 PM Leonard Martin Struttmann via Discuss <
discuss@lists.openscad.org> wrote:
> Roger, you are probably right, but, <sarcasm> isn't that the unspoken
> promise of AI? To relieve us humans of the burden of doing these things
> ourselves? </sarcasm> Who knows?
>
> In any event, I ordered a Miraco Pro today. I will report back here
> after I've had some time to play with it.
>
> Thanks! Len
>
>
>
> On Thu, Nov 21, 2024 at 9:26 PM Rogier Wolff via Discuss <
> discuss@lists.openscad.org> wrote:
>
>> On Thu, Nov 21, 2024 at 08:04:53PM +0800, Chun Kit LAM via Discuss wrote:
>>
>> > It might be possible to convert the point cloud into voxels, convert
>> > the voxel into a mesh, and do some post-processing on the mesh. If
>> > the target features are cube like (flat surfaces, right angles,
>> > etc.), this may work well.
>>
>> I suspect this (the post-processing) is still a PHD level research
>> project to "do it right". For a human it is trivially easy to
>> recognize: Oh, that's supposed to be a flat surface, and that other
>> thing is a smooth curve.
>>
>> 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.
>> ** 'a' for accelleration.
>> _______________________________________________
>> OpenSCAD mailing list
>> To unsubscribe send an email to discuss-leave@lists.openscad.org
>>
> _______________________________________________
> OpenSCAD mailing list
> To unsubscribe send an email to discuss-leave@lists.openscad.org
>
GH
gene heskett
Fri, Nov 22, 2024 6:16 AM
On 11/21/24 21:36, Rogier Wolff via Discuss wrote:
On Thu, Nov 21, 2024 at 09:04:03AM -0500, gene heskett via Discuss wrote:
So did I, in fact I still have it, non-functional. So I bought the ender 5
plus, first thing that broke was the plastic lever arm of the frame mounted
I have "left-to-right" (in my browser tabs and in my view physically
as well): An Anet A6, A tronxy (I don't know the model, the
build-plate is 330x330 and before I mounted a thing or two it
should've been 430 vertical.) a Creality S1 Plus and a 2D foam
cutter. All Octoprint. The first non-RPI now reports: "New version
available, shall I upgrade?" and then fails the upgrade, so I'm
sticking to octopi for now. Two run klipper.
If running klipper, install kiauh-master, cd to it and do ./kiaoh.sh and
follow the menu prompts, bearing in mind it spends a lot of time in the
backgound downloading the latest repo lists. I've been using it even for
system upgrades for around 3 years. The only thing you need to do when
it is done is a reboot. octoprint amd its kin have been history here for
years.
The tronxy now has a "direct extruder", so there is now an extruder
motor moving along the X axis. Might slow things down, but I've got it
tuned to be slightly faster than the ender. I'm not really optimizing
for speed.
Roger.
Cheers, Gene Heskett, CET.
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
On 11/21/24 21:36, Rogier Wolff via Discuss wrote:
> On Thu, Nov 21, 2024 at 09:04:03AM -0500, gene heskett via Discuss wrote:
>> So did I, in fact I still have it, non-functional. So I bought the ender 5
>> plus, first thing that broke was the plastic lever arm of the frame mounted
>
> I have "left-to-right" (in my browser tabs and in my view physically
> as well): An Anet A6, A tronxy (I don't know the model, the
> build-plate is 330x330 and before I mounted a thing or two it
> should've been 430 vertical.) a Creality S1 Plus and a 2D foam
> cutter. All Octoprint. The first non-RPI now reports: "New version
> available, shall I upgrade?" and then fails the upgrade, so I'm
> sticking to octopi for now. Two run klipper.
If running klipper, install kiauh-master, cd to it and do ./kiaoh.sh and
follow the menu prompts, bearing in mind it spends a lot of time in the
backgound downloading the latest repo lists. I've been using it even for
system upgrades for around 3 years. The only thing you need to do when
it is done is a reboot. octoprint amd its kin have been history here for
years.
>
> The tronxy now has a "direct extruder", so there is now an extruder
> motor moving along the X axis. Might slow things down, but I've got it
> tuned to be slightly faster than the ender. I'm not really optimizing
> for speed.
>
> Roger.
>
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
