Jump to content
Ultimaker Community of 3D Printing Experts

Underextrusion and seam with spiralize


Recommended Posts

Posted · Underextrusion and seam with spiralize

Hi,

I have two problems with the following print:

Slow underextrusion

Although it was printed at normal speed, the extruder started skipping and underextrusion occured. Initially I lowered the temperature in order to prevent the forming of blobs (which from my understanding would form from either too much pressure or high viscosity at high temperatures).

Key print settings are:

 

  • layer height: 0.2
  • shell: 0.8
  • bottom/top: 1.2
  • speed: 50
  • temperature: 230 (later on 225)
  • spiralize: on

The model is still full of small blobs. And while I am asking for 4mm^3/s filament, it still started underextruding at 225°. I don't want to raise the underextrusion red flag and blame the extruder - just wondering why this would happen under those circumstances.

The second issue (albeit not that important) is the visible seam on the model. I thought spiralize would get rid of it. What might be the reason for the seam then?

 

  • Link to post
    Share on other sites
    Posted · Underextrusion and seam with spiralize

    Actually it is trying to do 8mm^3. I'm impressed it did so well.

    The problem is with spiralize: it does it in a single pass so it is trying to do 200% flow to get that shell of 0.8. It's tough to squeeze .8mm wall out of a .4mm nozzle so it just can't quite do it. I think if you do .5 or .6mm shell you will be good.

     

  • Link to post
    Share on other sites
    Posted · Underextrusion and seam with spiralize

    No wait, according to the help tooltip for spiralize it does a single wall so it ignores the shell setting. And the print really does look like it is a single wall - it is very thin.

     

  • Link to post
    Share on other sites
    Posted · Underextrusion and seam with spiralize

    But it does 2X extrusion. In cura look at meters of filament used. Then change shell to .4 and you will see it will reduce by quite a bit (the part for the wall - the base will use the same amount).

     

  • Link to post
    Share on other sites
    Posted · Underextrusion and seam with spiralize

    hen I could simply either reduce flow to 50% o

     

    Yes, but not until it gets to the wall.

     

  • Link to post
    Share on other sites
    Posted · Underextrusion and seam with spiralize

    I recommend at least .5mm shell by the way. If you want this to be watertight.

     

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • Talking additive | The 3D printing podcast
        Why should we be the only ones asking questions? Join us and ask Jabil all your questions on September 22nd 5pm CET
          • Like
        • 3 replies
      • Ultimaker masterclass: Optimizing your Ultimaker Cura workflow
        Save your seat for either broadcast on September 23.
        What will you learn?
        · Best practices for iterative print preparation and every lesson you should learn from each print
        · The right way to use per-object settings and when they are most useful
        · Easy-to-use resources for anyone who wants to develop their own printer definitions, plugins, or print profiles
        · How to optimize print profile settings and whether to “keep” or “discard” changes
        · When is the right time to export your drawing from CAD? (Based on Ultimaker Cura’s surprising power as 3D control software)
        · And a whole lot more tips and tricks!
         
        How can I join?
        This free masterclass will take place twice:
        1. 11am CEST (5pm SGT, 5am EDT)
        2. 5pm CEST (11am EDT, 8am PDT, 11pm SGT)
          • Like
        • 0 replies
      • Do you use 3D printing at work? Let us know
        It doesn't matter if you are using 1 Ultimaker or 10, there is inspiration in everything. We're looking for ...
        • 1 reply
    ×
    ×
    • Create New...