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    Problems with a half-torus

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    • TeigT 離線
      Teig
      最後由 編輯

      No I don't mean unsoftened lines. You see how your base has segmenting? I had that but all the segmental radii were on the top of the base and gave me enough grief to make me bin it. I'm on the case again, at least I will be after I've had some sleeps, it's 0730 now and I'm toast 😄

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      • D 離線
        d12dozr
        最後由 編輯

        Yep, what Box said...the best way is to optimize the segments at the beginning. That said, you can use Netfabb Basic to quickly decimate (reduce the # of polygons) an existing model with out having to re-draw the whole thing.

        Here's how: open model in Netfabb, Right click > Level of Detail > Choose something like 50%.

        3D Printing with SketchUp Book
        http://goo.gl/f7ooYh

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        • TeigT 離線
          Teig
          最後由 編輯

          @d12dozr said:

          Yep, what Box said...the best way is to optimize the segments at the beginning. That said, you can use Netfabb Basic to quickly decimate (reduce the # of polygons) an existing model with out having to re-draw the whole thing.

          Here's how: open model in Netfabb, Right click > Level of Detail > Choose something like 50%.

          It must be something like Netfabb my mate's brother had to use for this last print, he ran it through some jiggery-pokery and took the file size down by 90%.

          I'll do this version again on night shift tonight with all your suggestions for minimising and see what happens, thanks again Marcus and Box 👍

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          • TeigT 離線
            Teig
            最後由 編輯

            I've just lashed one up tonight, with fewer sides/segments the .stl rolls in at 1.8mb, much better. I'll email it off for printing now.

            V36.skp

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            • cottyC 離線
              cotty
              最後由 編輯

              Nice and clean! Show us some photos after the print is back...

              my SketchUp gallery

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              • BoxB 線上
                Box
                最後由 編輯

                Yep, a very nice bit of modelling there. Well done.

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                • TeigT 離線
                  Teig
                  最後由 編輯

                  The strengthening of the throat-base was giving me some grief until I had a eureka moment and put the channels for the air vents underneath. Took about 20 minutes to draw, a far cry from a month ago when it took me 8 hours to get an outline 😄

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                  • TeigT 離線
                    Teig
                    最後由 編輯

                    I wonder what's wrong now... It's a long night on shift and started drawing an elbow, it's an exercise really with the general (virtual) notion being to mount the bellmouth up out of the way. So I started fiddling and came up with this:

                    Elbow v1.jpg

                    It gave me a bit of bother trying to draw the support flanges, the result being it's not solid. I'm being told I'll need to manually remove faults. That's my latest problem, I've duplicated and scaled up trying to use the 'Dave R' technique but it doesn't work, SolidSolver unable to fix it. Anyone for some guidance on this one?

                    Elbow.skp

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                    • BoxB 線上
                      Box
                      最後由 編輯

                      If you intersect the top face of the flange with the collar you can remove the face you can see in the tube. Then a bit of cleanup of some stray lines and it is a solid.
                      I can give it to you fixed if you want it.

                      I just noticed it is a group, so edits on the big one won't flow to the small one.

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                      • TeigT 離線
                        Teig
                        最後由 編輯

                        Oh fiddle! I should have done it as a component.... 😡 I'll try and figure out what you mean Box, I may be back soon... 😄

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                        • TeigT 離線
                          Teig
                          最後由 編輯

                          Strewth! How do you intersect them? There's a trio of choices, with face, with model and with selection, none seem to work.

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                          • TeigT 離線
                            Teig
                            最後由 編輯

                            @box said:

                            I can give it to you fixed if you want it.

                            Yes please Box! My grey matter is frazzled 😄

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                            • BoxB 線上
                              Box
                              最後由 編輯

                              Here, I'll give you this gif, and see how you go.
                              But remember to make it a component this time.

                              Edit:if you are wondering what the first context menu was, it was just the intersect face one, but it was off screen so a moved down and did it again to get it where you could see it.


                              With selection.gif

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                              • TeigT 離線
                                Teig
                                最後由 編輯

                                And I thank you once again Box, I did what you said, couldn't see what you could see to understand why it worked bu the result is solid! 😄

                                Elbow.skp

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                                • BoxB 線上
                                  Box
                                  最後由 編輯

                                  On your original when you look into the pipe you see a blue face, this it the back side of the top face of the flange, so by intersecting that face you can remove the part blocking your airflow, and then removing the other edge/ring gets rid of an internal face.


                                  Inner Face.gif

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                                  • TeigT 離線
                                    Teig
                                    最後由 編輯

                                    I knew immediately I'd have internal face when I pulled 'backwards' didn't know to get rid though. I do now 😄 Onwards and upwards, time of home soon for some sleepsssss. Once again, TVM Box.

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                                    • TeigT 離線
                                      Teig
                                      最後由 編輯

                                      Been playing again tonight and seem to have nailed it 😄

                                      Elbow5star.jpg

                                      Elbow.skp

                                      Now to get rid of the five star mount and think about how to draw a snap-on clip type system. I've drawn loads of bellmouths of various sizes; it'd be really cool to be able to clip-on clip-off different ones and be able to compare the difference in the torque/power response immediately 🤓

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                                      • D 離線
                                        d12dozr
                                        最後由 編輯

                                        Superb, Teig! It's neat to watch your progression from the beginning of the thread to now 👍

                                        3D Printing with SketchUp Book
                                        http://goo.gl/f7ooYh

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                                        • BoxB 線上
                                          Box
                                          最後由 編輯

                                          Indeed is is good to see.
                                          Have you thought about a keyhole type slide fitting.
                                          Slide it on and a simple quick release split pin to lock it.

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                                          • TeigT 離線
                                            Teig
                                            最後由 編輯

                                            Or R-pins for more simplicity? Yes, good idea. I've been looking around at plastic snap-clips for ideas but that might be simpler.

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