Ooze control for IDEX mods.

Discussion in 'Show off' started by gonzalo, Nov 14, 2017.

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  1. gonzalo

    gonzalo Well-Known Member

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    Hey BigBoxers!
    So, I have this dual hybrid B.B. converted to IDEX using Greg’s Bowden IDEX conversion but replacing the Bowden Titans for 2 remote direct drive Zesty Nimble extruders. But I never liked the ooze shield or purge tower or (sorry Greg) Greg’s oozeless ram purge script. So, I added some silicone rubber wipes running along the sides of the bed and a stainless steel plate under each nozzle where they park when not in use. This way the filament does not bleed out while idle because it is blocked shut by the steel plate, and the silicone rubber wipe keeps cleaning the nozzle every time the nozzle moves in either direction; either going to print or going to idle. The result is a clean print and zero bleeding from the nozzles. Still running tests but as you can see it looks pretty good! See video please.
     
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  2. Ephemeris

    Ephemeris Well-Known Member

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    Wow! I'm not an IDEX convert, but that's impressive! Beautiful implementation of your idea.
     
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  3. Old_Tafr

    Old_Tafr Well-Known Member

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    This is TOO much! every time I get a plan to improve my BB along comes another mod !!!

    Only kidding !!! great idea, and fascinated to know that the ooze problem (normally a quick flick with a bronze wire brush, then let it print a perimeter to get things flowing) fix works so well.
     
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  4. AndyVirus

    AndyVirus Well-Known Member

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    Great idea! How have you mounted this? Replaced the Z Rod caps?
     
  5. gonzalo

    gonzalo Well-Known Member

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    The wipes are superglued to the rod caps, the steel plates are attached to a 3d printed piece that screws to the Y carriages, I just drilled a vertical hole centered between the belts to attach them with M3 screws..
     
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  6. jfb

    jfb Well-Known Member

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    Another one to add to the ever growing list of mods I'll get round to eventually. Very nice job. Thanks for sharing :)
     
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  7. W1EBR.Gene

    W1EBR.Gene Well-Known Member

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    Great idea! I plan to do the same. Do you have STL files for the parts you created?
    Thank you!
     
  8. gonzalo

    gonzalo Well-Known Member

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    I love the things you can print when dual works the way it should

     
  9. W1EBR.Gene

    W1EBR.Gene Well-Known Member

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    I have a question about your implementation:
    - I printed out your ooze blockers and the nozzle in my setup is about 5 mm lower than where the flexible metal plate attaches. Does the design you made line up with the nozzles in your setup? If so, I am wondering why the hot end isn't mounted higher up in my setup.

    Thanks!
     
  10. gonzalo

    gonzalo Well-Known Member

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    The metal plates bend down and back to horizontal to match the height of the nozzles. Just use needle pliers to bend down close to the printed part and then back up a little closer to the nozzle. Look at the video, You can see the bend on the plates quite well.
     
  11. eca

    eca Well-Known Member

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    What are you using for metal plates? I will be working on the same conversion as soon as my direct drive lead screws come in (taking longer than normal to get here :mad:). I wanted to first get rid of the banding before starting on printing the parts for this.
    Any tips on the config settingsfor the Diet?
     
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  12. gonzalo

    gonzalo Well-Known Member

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    I used some parts from an old computer case, they are part of the hard drive sliding tray I believe. See pics.
    [​IMG]
    [​IMG]
     
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  13. gonzalo

    gonzalo Well-Known Member

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    Here are some pictures to better show the whole thing. I drilled a hole down the center or each Y carriage, right between the 8mm rods and away from the edge just enough to make my 3d printed part go flush against the edge. The steel plate was cut and bent to fit just right and at the right height and screwed to the bottom of the part with 2 M3 bolts and nuts. That’s it. I am still with my factory RUMBA so no idea what to do with Duet.
    [​IMG]
    [​IMG]
    [​IMG]
    By the way, I use Polymaker polysmooth filament as support material with PLA, it works FANTASTIC! I set support to zero clearance between the part and the dense support structure and the end surface is better than the top printed surface now!
     
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  14. Shao

    Shao Member

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    Love your idea and implementation! Have you publicly shared the STL files? I can't find them.
     
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  15. Alex9779

    Alex9779 Moderator
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    WOW! Very cool idea. I always though about an ooze control with blocking the nozzle. Just opened my old empty Chieftech tower and voilá I have those parts too in there... Going to adapt for the rail IDEX setup with my servo wipers...
     
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  16. gonzalo

    gonzalo Well-Known Member

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    There you go.
     

    Attached Files:

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  17. Alex9779

    Alex9779 Moderator
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    @gonzalo so just another question, your are not using an ooze shield or and prime tower as you pictures show... Are you just moving the idle tool to the outside over the ooze plug when switching tools so just a simple switch of tools without doing anything with the old or the new tool?
     
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  18. Shao

    Shao Member

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    Thanks Gonzalo!
     
  19. gonzalo

    gonzalo Well-Known Member

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    Correct, nothing added, just play with tool change retraction and coast and z lift. The added benefit is that the nozzle is not emptying while idle so the nozzle stays primed. I am using very low retractions, around 1mm work for me. Watch the video at the beginning of the post, you can see that nothing happens on the tool change.
     
    #19 gonzalo, Jan 20, 2018
    Last edited: Jan 20, 2018
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  20. Alex9779

    Alex9779 Moderator
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    Ya I watched it but wanted to be sure whats going on :D
     
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