3D Printing Hollow Bridge

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  • biggsgolf
    Captain
    • Jan 2020
    • 720

    3D Printing Hollow Bridge

    Hi all, when using Cura I cannot figure out how to print my bridge hollow. Cura shows it hollow but prints a 2.3 mm solid bottom and at the top. Inhave tried raising it with supports. I have been placing it level with base at the bottom. Help!
  • CC Clarke
    Lieutenant Commander
    • Aug 2020
    • 239

    #2
    Does the STL have a solid base?

    Comment

    • DrScoles
      Ensign
      • Jun 2021
      • 7

      #3
      Do you have meshmixer? Simple to do a plane cut, or hollow, then plane cut. I am on vacation in Mexico, but if you need help with this, pm me and send file, it would take a few minutes on Monday.

      Comment

      • CC Clarke
        Lieutenant Commander
        • Aug 2020
        • 239

        #4
        I can review and repair the file now if needed.

        CC

        Comment

        • biggsgolf
          Captain
          • Jan 2020
          • 720

          #5
          The STL does not have a solid base

          Comment

          • rwtdiver
            Vice Admiral
            • Feb 2019
            • 1768

            #6
            Make sure you are using a raft!

            Rob

            Comment

            • RanSan
              Lieutenant
              • May 2020
              • 61

              #7
              What is your setting for Bottom layers in Cura? It should be 0.

              Randy

              Comment

              • biggsgolf
                Captain
                • Jan 2020
                • 720

                #8
                Thanks guys, I will try using a “raft”. My last attempt is better, using “spiralise Outer Contour” and disabling “Union Overlapping Volumes”. The walls are too thin, lol

                Comment

                • biggsgolf
                  Captain
                  • Jan 2020
                  • 720

                  #9
                  Originally posted by RanSan
                  What is your setting for Bottom layers in Cura? It should be 0.

                  Randy
                  Randy, it is 12. What should top layers be? For thicker walls what should I change?
                  Last edited by biggsgolf; 07-09-2021, 06:24 PM.

                  Comment

                  • biggsgolf
                    Captain
                    • Jan 2020
                    • 720

                    #10

                    Comment

                    • biggsgolf
                      Captain
                      • Jan 2020
                      • 720

                      #11
                      When using a raft should the Bridge be on the bed or raised above?

                      Comment

                      • rwtdiver
                        Vice Admiral
                        • Feb 2019
                        • 1768

                        #12
                        [QUOTE=biggsgolf;n151308]When using a raft should the Bridge be on the bed or raised above?[/QU

                        Flat to the bed!

                        Comment

                        • RanSan
                          Lieutenant
                          • May 2020
                          • 61

                          #13
                          What version of Cura are you using? Not that it matters it is just different than the latest.
                          I use Wall Line Count and Top and Bottom Layers not Thickness. I have a rough idea of the thickness by looking at the Line Width under Quality? Use that to figure out the rest. For example I use 0.4mm Line Width. My walls are 2mm so 2 / 0.4 = 5 wall count. My tops are 3-5 layers and my bottoms are 0-3.

                          Personal perference, I don't use rafting it uses to much material. I like 10 count on brim.

                          Hope that helps.

                          Comment

                          • RanSan
                            Lieutenant
                            • May 2020
                            • 61

                            #14
                            Oh ya don't use spiralise Outer Contour that will only give you 1 wall.

                            Comment

                            • biggsgolf
                              Captain
                              • Jan 2020
                              • 720

                              #15
                              Great info guys, many thanks. I am using version 3.6.0 as any newer version does not work on my older Macbook.

                              Comment

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