Jump to content
Belmaciel

Printing in the air heat migrating to filament top, could it be retraction?

Recommended Posts

Posted · Printing in the air heat migrating to filament top, could it be retraction?

Hello guys,

I'm having a terrible time printing some small stuff. I've tried to print the same object four times and I begin to recognize a pattern around here.

The issue is that my print would clog approximately at the same stage in all my prints. I believe the clog is due the heat migrating to the top of the filament blocking the PTFE tube since when I remove the filament from the bowden tube It is clearly deformed, so in order to flow again I just clip the deformed part and the flow would come back nicely. So there's no nozzle clog.

What I observed is at that stage the print would travel very fast pouring material and retracting, Could this be the real issue for deforming the filament?

I'm already printing at a relative low heat 200C or Is 200C still too hot? The printing is about 2 hours only.

IMG_4559.thumb.JPG.6df99b2b1ba8360d579dcedc67143748.JPG

IMG_4560.thumb.JPG.0a6ff0d487556c1f80952c1b8aa1d04b.JPG

I'm using Cura 15.04 on Ultimaker one

my settings are:

Quality

layer height: .1 mm

Shell: .8 mm

Speed and temp:

Print speed:15mm/s

Temp: 220 (at start then I reduce to 200 after the print is well adhered to platform)

nozzle:0.4

filament: 3mm

Retraction:

Speed: 50mm/s

Distance: 5.5

please help! :)

IMG_4559.thumb.JPG.6df99b2b1ba8360d579dcedc67143748.JPG

IMG_4560.thumb.JPG.0a6ff0d487556c1f80952c1b8aa1d04b.JPG

Share this post


Link to post
Share on other sites
Posted · Printing in the air heat migrating to filament top, could it be retraction?

Did you check the PTFE coupler? It is different from the UM2 but could be damaged/deformed. You could check the filament too. If the diameter changes regularly (on every loop), this would explain why it always clogs at the same spot.

Share this post


Link to post
Share on other sites
Posted (edited) · Printing in the air heat migrating to filament top, could it be retraction?

You probably just have a slow jam, your prints look good. Do like a million atomic pulls and try it again. If youre worried its the pfte then just change it, but i found that the pfte is dead only when i cant do any atomic pulls.

Nozzle clogs are not so simple to see with abs btw, its always more visible with pla, as it melts at lower temps, and its the lower temps which cause the jams. I dont print 0.1 much so cant advise you on that, but another thing i would do if i wad you would be printing hollow (zero shell, as for small stuff you dont need it, just make the shell a bit thicker my default is 1.2 for everything. Its never failed me 0.8 has failed me loads and i never go below 1.2 now.

Edited by Guest

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Our picks

    • Ultimaker Cura 4.0 | Stable available!
      Ultimaker Cura 4.0 is mainly focused on the improved user interface and cloud integration.
      As always, we want to collect your user feedback for this release. If there are any improvements you can think of, feel free to mention it here and help us to shape the next release.
      • 98 replies
×
×
  • Create New...

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!