Jump to content

Retraction


johan

Recommended Posts

Hi,

I am using Cura on both my Ultimaker, and my Reprap, and am very pleased.

At the moment I am printing on the Reprap at high speed, and it is coming out nicely. The only thing is that I get a little blob where the z lifts. I use a retraction speed of 35mm/s, distance 12mm and extra lenght on start 0mm. The Reprap have a Bowden extruder.

I can see that it purges out about 7mm before it starts to move the head. I guess this happens because of preassure beeing build up in the Bowden tube. In SF you set both the lenght of retraction, and how much you push back after the move if I remember right? Is it possible to do this in Cura?

Johan

  • Link to post
    Share on other sites

    Uh, try a negative extra start. Even if the GUI says it's wrong, you can still try. Not sure if it works, you'll have to try.

    However, I do not see how that would make sense.

  • Link to post
    Share on other sites

    i have the same smal blob issue on my ultimaker.

    what is suggested to change first?

  • Link to post
    Share on other sites

    I highly doubt you have the exact same issue, blobbing can be caused by many different things. What settings are you printing at yzorg?

  • Link to post
    Share on other sites

    I got you some screenshots..

  • Link to post
    Share on other sites

    0.28mm layers at 80mm/s? That's a lot of filament you are extruding per time, most likely you have a very high pressure build up, most likely some of this pressure is still escaping as filament during the retraction. You could try retracting less, this will give slightly more strings but makes the head stop shorter causing less blobbing.

  • 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

      • Introducing the UltiMaker Factor 4
        We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
          • Thanks
          • Like
        • 3 replies
      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
         
          • Like
        • 26 replies
    ×
    ×
    • Create New...