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Unresolved Fan Duct for Bridging???

Discussion in 'Troubleshooting' started by Kirk, Feb 26, 2015.

  1. Kirk

    Kirk Member

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    Hello,

    I am still working on bridging with preety unsucsull results. would a fan duct help with this? and would it work just as good for regular prints? also would 1 or 2 ducts be better? I am working PLA

    I was looking at this one to try http://www.thingiverse.com/thing:431160
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    @Galaxius did those and a couple of others.
    I am using one of his designs on mine and yes, the duct can absolutely make a difference on bridging.
     
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    running the filament too hot can negatively impact bridging but that you will need to test for.
     
  4. Kirk

    Kirk Member

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    Yeah his is the one I am looking at.... I have my temp down to 195-197 for the layers Of The bridge
     
  5. robert sanchez

    robert sanchez Active Member

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    I have a remix of @Galaxius duct, that I'll try to post tonight on thingiverse. With the internal geometry lofted to increase flow efficiency by reducing circulation. I ran a few iterations by @Galaxius and @Mike Kelly.

    EDIT: remix is attached here.
     

    Attached Files:

    #5 robert sanchez, Feb 26, 2015
    Last edited by a moderator: Feb 26, 2015
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  6. Kirk

    Kirk Member

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    Thanks I will print this one as well to try.... My fear is that the air speed would be to fast out of a duct and blow the filament to the side or put to much stress on it..... Is this the case and just need to find a sweet spot?
     
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I have never seen that.
    Not saying it won't happen, but never seen it myself.
     
  8. robert sanchez

    robert sanchez Active Member

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  9. Galaxius

    Galaxius Well-Known Member

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    You should be able to set the bridging fan speed in your slicing software, I know you can in Simplify3d and I'm pretty sure you can in Slic3r too.
     
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  10. jbigler1986

    jbigler1986 Active Member

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    Those fans are amazing. I hate the color though. I don't think they have any with a solid color. I think they have a black one but it even has brown on it. Awesome fans though.
     
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  11. milks

    milks Member

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    The stock 40mm Robo fan will push more air than the noctura. I upgraded to a delta fan but even that is only a little more powerful than the stock Robo at 8.1cfm
     
  12. Kirk

    Kirk Member

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    What are the specs for a stock Robo fan?
     
  13. milks

    milks Member

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    If my memory serves me correctly it was around 7cfm; took me a while to track it down
     
  14. Marquis Johnson

    Marquis Johnson Active Member

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    I just use both the fans that come with the printer, one from the ramps (disclaimer: I PUT ANOTHER ONE ON THERE) and the one that initially cools it, and I designed my own clip on tool less design. http://www.thingiverse.com/thing:697200 20150228_023144.jpg
     
  15. milks

    milks Member

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    That is the best design Ive seen so far, nice work!

    Would it also work with the hexagon hot end or just the E3D? I seem to remember the nozzle of the E3D hangs a bit lower when installed on the robo.

    Thought Id throw my own design into the mix too. Designed to fit straight onto the stock Robo with hexagon: http://www.thingiverse.com/thing:649803
     
  16. Kirk

    Kirk Member

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    Marquis I like your design but I see it's made for the e3d hot end. I still have the stock hotend (pre hexagon) do you know if it would fit/work with it? It seems that the hotend distance would be different?
     
  17. Kirk

    Kirk Member

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    Also does it fit into the top of the case? Or would it have to be removed?
     
  18. Marquis Johnson

    Marquis Johnson Active Member

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    hmm, if the stock hot end is shorter than it will not work. I can design one like it for the hexagon hot end, just move a few lines and that's all. How much taller is the e3d than the hexagon? I broke my stock end first week of owning the printer.
     
  19. Kirk

    Kirk Member

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    My rough measurement was about 13mm and it would be blowing just below the heat block at the tip. What type of file is it, maybe I can edit it also?
     
  20. Mike Kelly

    Mike Kelly Volunteer

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    The E3D v6 is 62mm from nozzle to top of heatsink.

    The Hexagon is 55.2mm
     

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