Jump to content
Ultimaker Community of 3D Printing Experts

Unwanted/useless retractions - Cura 2.5


Recommended Posts

Posted (edited) · Unwanted/useless retractions - Cura 2.5

I printed a part preprocessed with Cura 2.5. When printing i realized a lot of retractions where i didn't expect them. When looking in Cura i found out why:

Between the inner and outer wall there is a done filling, but due to the small distance it is not possible to create something else than small lines - every one produces a retraction.

Bildschirmfoto_2017-05-08_09-45-23.thumb.png.443456fec0a35d55df7d9d7fd104c79a.png

Thickness is 1.5mm, Nozzle 0.5mm

I thought about how i can remove this behaviour, but even increasing the wall thickness from 1mm to 3mm didn't help.

What i was wondering: The thickness of the area is 1.5mm - should be covered with the wall thickness AND 3x0.5 linewidth. Why not??? And why is the software making very short lines instead of a line thorugh?

That you can imagine: on the part are four such geometries, every causes about 20 retractions. This means about 80 retractions for these geometries on every layer, means for the 360 layers around 7200 extra/useless/unwanted retractions!!

Of course you can tell me - increase the retraction minimum travel or disable retractions. But with the used preferences i got good results, so i'll not change them.

Bildschirmfoto_2017-05-08_09-45-23.thumb.png.443456fec0a35d55df7d9d7fd104c79a.png

Edited by Guest
  • Link to post
    Share on other sites
    Posted · Unwanted/useless retractions - Cura 2.5

    Maybe is the infill overlap. Since that forces infill to touch perimeters, that might create small amounts of infill that the slicers needs to 'accomplish' the amount selected. If that's the case. Split the object in two, merge, and select per object setings to the part that doesn't need that.

  • Link to post
    Share on other sites
    Posted · Unwanted/useless retractions - Cura 2.5

    I understand what you mean, nevertheless the wall is done with 0.5mm and that does not fit to the 1mm which it should be. Where is the part of the "inner wall"??

    And I'm as a user don't want to think about such special things.

    So a request: would it be possible to give at least a warning if in a "small area" a lot of retractions happen? This would make one aware. In this case i realized it during printing. At generatig the gcode i never thought that this would be a problem - as said wall thickness 1mm should cover it.

    Better would be that this never happens.

  • 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...