Jump to content

Retraction problems


truckle

Recommended Posts

Posted · Retraction problems

I've started getting a lot of lines on the first layer which show up badly when the underneath of the print is examined, for e.g. this iPhone cover.

I think it is a retraction problem but I can't seem to find the right settings.

I printed this test print, first layer, at 200 degrees temp.

Travel speed 200mm/s

Min travel 1

Min extrusion 0.02

combing off

Any suggestions anyone?

Thanks in advance.

retraction problem

 

  • Link to post
    Share on other sites

    Posted · Retraction problems

    Well, make sure that retraction is actually turned on, on the basic tab - that's an easy one to miss.

    BUT... it looks like the strings are happening on the moves between the 'skirt' lines?? Is that the case? Cura doesn't retract when drawing skirt or brim. And that makes a huge mess. You could try printing without a skirt - or making the skirt offset so big that no lines of skirt get drawn inside the holes in the print.

    Or you could edit the Gcode by hand, and put G10 before and G11 after every G0 move in the skirt part of the first layer. (Assuming this is for an Ultimaker²).

     

  • Link to post
    Share on other sites

    Posted · Retraction problems

    No it's not associated with the skirt particularly, it happens between the "holes" inside the print. It is an UM 2. Or am I mistaken? Does the skirt mean those lines inside the holes also? In which case it is possibly a skirt type of problem. I cannot really be bothered with going into the code though.

  • Link to post
    Share on other sites

    Posted · Retraction problems

    The skirt is the line that isn't part of your print, and gets drawn on the first layer only, around the print. This can include inside the print, if there are holes. For instance, I presume that the odd blobby shape inside the large Apple logo isn't actually part of the finished print, is it?

    Well, if you don't want to mess with the code, then maybe try one of the other two things that I suggested.

     

  • Link to post
    Share on other sites

    Posted · Retraction problems

    Expert settings, Skirt -> Start Distance.

    Not the best label for it, but it's the offset between object and skirt. if you make that large enough, you'll still get a skirt, so that will help prime the head before the print starts, but it won't put any inside the holes.

     

  • Link to post
    Share on other sites

    Posted · Retraction problems

    Brilliant! Thanks for helping out a bit of a dunce!

  • 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

      • 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
        • 15 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...