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RE: [diy_3d_printing_and_fabrication] Re: Coarse surface....topological aspect

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  • joan raven
    but It will be more logical if there are a faceted (triangulated) curve, just to show this triangulation on the model??? To:
    Message 1 of 11 , Apr 3, 2013
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      but It will be more logical if there are a faceted (triangulated) curve, just to show this triangulation on the model???




      To: diy_3d_printing_and_fabrication@yahoogroups.com
      From: MikeJ@...
      Date: Wed, 3 Apr 2013 18:27:18 -0600
      Subject: Re: [diy_3d_printing_and_fabrication] Re: Coarse surface....topological aspect

       
      Yes, polygon count will make a big differences.  Can't print a smooth curve if the surface is made out of just a few big'o triangles!



      On 4/3/2013 6:23 PM, joan raven wrote:
      The weird thing is this model that is completely smooth that I get from my printer...

      (That now i'm realizing the polycount is much higher....maybe this affects???)

      STRANGE!!!!!!!


      To: diy_3d_printing_and_fabrication@yahoogroups.com
      From: MikeJ@...
      Date: Wed, 3 Apr 2013 17:45:33 -0600
      Subject: Re: [diy_3d_printing_and_fabrication] Re: Coarse surface....topological aspect

       
      That is strange, typically higher resolution will result in smaller building blocks and give better results.
      You saw the whale at 100 microns, here's a figure at 75:  http://b9creator.com/wordpress/wp-content/uploads/2013/03/0qs5y-knightupclose.jpg
      It's hard to tell without side by side comparison, but the figure is smoother (smaller voxels).



      On 4/3/2013 5:36 PM, joan raven wrote:
      Thanks for the answer Mike, u have been a big inspiration for me!

      But the strange thing is I get sometimes a heavy coarseting in my 50 micron objects. And more strange is I printed one object that it's super smooth, but using the same setting that I use always.

      I will make a test tomorrow: Printing 2 same models, but with different amount of decimation, and will see how it affect to this "topological maps"...If someone tried before, please share your experience!!!!

      To: diy_3d_printing_and_fabrication@yahoogroups.com
      From: MikeJ@...
      Date: Wed, 3 Apr 2013 17:11:49 -0600
      Subject: Re: [diy_3d_printing_and_fabrication] Re: Coarse surface....topological aspect

       
      That's "topological" artifact is a result of both a good detailed camera
      shot (that object is less than 4" long) and the fact it is printed (and
      was sliced for ) 100 micron XY resolution.
      The object is built from 100 micron "bricks" AND these bricks can not be
      moved side to side, they MUST fall into a fixed 100 micron grid.
      If an object looks smoother it's because the resolution is blurred.

      And, as jwanett mentions, the model's mesh smoothness matters too.

      MikeJ

      On 4/3/2013 4:58 PM, jwanett wrote:
      > Or maybe it depends of the model, the amount of decimation????
      >
      >
      >
      >
      > --- In diy_3d_printing_and_fabrication@yahoogroups.com, "jwanett" <jonichk@...> wrote:
      >> Hi everyone!!!
      >>
      >> At first sorry for my english, i'll try to explain myself as good as I can.
      >>
      >>
      >> My printer is working really well, on the mechanical side...But I have a problem that I thing it's common in this kind of printers:
      >>
      >> - Coarse aspect on the surface, looking like the topological maps.Not related to the z layers. It's more something related to the xy plane.
      >>
      >> At the beggining I thought it was related to the resolution of the slices (I use png slices), but now having more high resolution slices, the problem is still there. Today I noticed this in a B9Creator model as well:
      >>
      >> http://b9creator.com/wordpress/wp-content/uploads/2013/04/rdkfe-IMG_2519.jpg
      >> It's related to the algorithm routine that uses the slicer??? or it´s more a thing of the resolution of your projector???
      >> There are a way for improve this kind of effect???
      >>
      >>
      >> Now I'm printing with an SVG from slicer, let's see if it's less coarsy than the slices that I get from NettFabb Free.
      >>
      >>
      >> Hope this makes sense!!
      >>
      >>
      >> Cheers to evryone from Barcelona!!!
      >>
      >
      >
      >
      > ------------------------------------
      >
      > Yahoo! Groups Links
      >
      >
      >
      >

      --
      "Measure Twice, Cut Once"
      http://www.B9Creations.com



      -- 
      "Measure Twice, Cut Once"
      http://www.B9Creations.com


      -- 
      "Measure Twice, Cut Once"
      http://www.B9Creations.com

    • Graham Stabler
      Correct, you would expect a faceted surface (still made up of stair cases) I suspect you are a little out of focus with your smooth models. Graham
      Message 2 of 11 , Apr 4, 2013
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        Correct, you would expect a faceted surface (still made up of stair cases)

        I suspect you are a little out of focus with your smooth models.

        Graham


        On Thu, Apr 4, 2013 at 1:45 AM, joan raven <jonichk@...> wrote:
         

        but It will be more logical if there are a faceted (triangulated) curve, just to show this triangulation on the model???
      • Graham Stabler
        And could that be because your resin level has gone down slightly?
        Message 3 of 11 , Apr 4, 2013
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          And could that be because your resin level has gone down slightly?

          On Thu, Apr 4, 2013 at 10:13 AM, Graham Stabler <grezmos@...> wrote:
          I suspect you are a little out of focus with your smooth models.

        • Francis Leach
          Dear Solidprinters. The result from the B9 creator looks very good. Even the Professionals Shapeways have their limitations. I attach for you general
          Message 4 of 11 , Apr 4, 2013
          Dear Solidprinters.

          The result from the B9 creator looks very good.

          Even the Professionals "Shapeways" have their limitations.

          I attach for you general interest  shots of commercial offering from them which I term "as rough as a bears Ar*e" 

          There should be standards quoted for the surface finish of flat surfaces so one can assess the suitability of the numerous solidprinting machines and associated results. 

          The best machines on the market are the Solidscape wax printer and the Envisiontec Prefactory. 

          It appears that the B9 machine is getting their and I hope the Formlab liberates good results.

          regards

          Francis Leach


          On 3 April 2013 23:56, jwanett <jonichk@...> wrote:
           

          Hi everyone!!!

          At first sorry for my english, i'll try to explain myself as good as I can.

          My printer is working really well, on the mechanical side...But I have a problem that I thing it's common in this kind of printers:

          - Coarse aspect on the surface, looking like the topological maps.Not related to the z layers. It's more something related to the xy plane.

          At the beggining I thought it was related to the resolution of the slices (I use png slices), but now having more high resolution slices, the problem is still there. Today I noticed this in a B9Creator model as well:

          http://b9creator.com/wordpress/wp-content/uploads/2013/04/rdkfe-IMG_2519.jpg
          It's related to the algorithm routine that uses the slicer??? or it´s more a thing of the resolution of your projector???
          There are a way for improve this kind of effect???

          Now I'm printing with an SVG from slicer, let's see if it's less coarsy than the slices that I get from NettFabb Free.

          Hope this makes sense!!

          Cheers to evryone from Barcelona!!!




          --
          Regards

          Francis Leach

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