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How can I fix the weird stringing?


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Posted · How can I fix the weird stringing?

Hi,

 

I wanted to print something like this with Ultimaker 3.

 

 

692918453_Image2021-09-06at11-09-28.thumb.png.231951768df3d34effc5dd4eea6728de.png1812430981_Image2021-09-06at11-09-39.thumb.png.f1995e0ae3b2150cdec816b8d82383fd.png

 

 

 

However the print failed. As you can see the left pillar was suffered from weird stringing. I tried the second attempt reducing Print Speed from 60 mm/s to 20 mm/s with no avail.

IMG_20210906_113203.thumb.jpg.c8c316b41334c3c2b0fcf0783f84a609.jpgIMG_20210906_112257.thumb.jpg.661827bba63c8c4fcb7b8007a4086975.jpg

 

 

  • The problem occurred almost only to the left pillar.
  • Instead of thin strings connecting between pillars, relatively thick (0.5 mm?) curly strings appeared and tangled up mostly at the "southeast" corner of the left pillar.
  • Priting Temperature, 180°C
  • Enable Retraction, enabled
  • Z Hop When Retracted, enabled
  • The nozzle has a little bit of black PLA but extruding all right, and not stuck.

 

The curly strings look pretty different from stringing examples on this page: https://support.ultimaker.com/hc/en-us/articles/360012016280-How-to-fix-stringing

 

Does anyone have any idea to fix this problem?

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    Posted · How can I fix the weird stringing?

    Hello @kouichi_c_nakamura, what happened to the support pillars that you created? Were they still standing up? I imagine them being so tall, the taller they grow the more they'll wobble under the movement of the printhead, and at some point might break, tip over or get quite deformed and loose their supporting nature. You'll be best off creating a wider footprint for the support. 

     

    Why the stringing is so 'thick', probably because it is not just a string (which is oozed filament leaking from the nozzle), but part or all of the material it intended to print on the support pillar, but it couldn't and dragged it back to your print. Hope this helps!

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    Posted · How can I fix the weird stringing?

    Thanks for the response.

    Good question. Maybe I should have taken a picture of what the whole things was like. But I think it was standing.

    Despite a lot of curly strings, the very first attempt of print looks functional after getting rid of those strings by fingers. So I'll give it a try.
     

    Quote

    Why the stringing is so 'thick', probably because it is not just a string (which is oozed filament leaking from the nozzle), but part or all of the material it intended to print on the support pillar, but it couldn't and dragged it back to your print. Hope this helps!

    Thanks for the idea. Not sure this informaiton is helpful, but the left support pillar also had a lot of thick curly strings around.

    IMG_20210907_110052.thumb.jpg.68acf1fb1b0cca94e9bc956cdb057fac.jpg

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