Jump to content

spiralize to the top?


Recommended Posts

Posted · spiralize to the top?

i know the spiralize function in cura only supports objects with no tops.

well, i don't really have a top on my objects and i would like to use the spiralize function, because it gives me a nice continuous single walled print on the transparent object.

is there any chance to force cura to do more layers on the top, to close the hole?

"solid infill top" and "bottom/top thickness" has no influence.

my object has no bottom, does that makes a difference?


0.1 layer height and 0.4 wall thickness


  • Link to post
    Share on other sites

    Posted · spiralize to the top?

    There's not much you can do. If you set infill to 0 and top/bottom thickness to 0 and shell to .4mm and skip spiralize you will get almost what you get now - a .4mm shell with no top or bottom.

    But if you set top thickness to even just .1mm you will get "shelves on many of the sloped layers (top 2/3 of your part) to support the layer above - this will show through to the outside and change the look. Really the only thing you can do is a gradual curve to close the top very very gradually combined possibly with thinner layers so the steps aren't too obvious at the top.


  • Link to post
    Share on other sites

    Posted · spiralize to the top?

    thanks gr5, do you mean with "gradual curve" to change the geometry?

    if i understood you right, its a contruction issue, that can't be handeled in a differen't way with a different slicer?

    so if i don't want to change the geometry, i can only skip spiralized and find the best layer/top thickness relation, to get a more or less regular transparent surface? hm...thats tricky...

  • Link to post
    Share on other sites

    Posted · spiralize to the top?

    Slic3r seems like a good candidate for what you're trying to do. You can uncheck "Extra perimeters if needed" so it won't print the "shelves" to help support the upper layers that gr5 mentioned.

    Here's the start and end g-code that I've been using for slic3r, which seems to work OK:


    G21 ;Metric Values

    G90 ;Absolute Positioning

    M82 ;Extruder to Absolute

    M106 S0 ;Fans Off

    G28 ;Home All Axes

    G1 X5 Y10 F9000 ;Move Head to ~Origin

    G1 Z20 F9000 ;Raise Bed to Head

    M140 S<BED> ;Set Bed Temp

    M190 S<BED> ;Wait For Bed to Reach Temp

    M109 T0 S<TEMP> ;Set & Wait Head Temp

    T0 ;Select Extruder 1

    G92 E0 ;Zero Extrude L



    T0 ;Select Extruder 1

    M104 S0 ;Head Temp Off

    M140 S0 ;Bed Temp Off

    G91 ;Relative Position

    G1 E-1 F300 ;Retract 1mm

    G1 Z+0.5 X-20 Y-20 F9000 ;Drop, Move Head

    G90 ;Absolute Position


    The initial priming that Cura does seems to cause problems with slic3r, so I removed it. Instead, I make sure I print a skirt of 3-4 loops. Also, for some reason, I have to manually set the temperature of the hot end and bed on the U2 front panel before it will start printing.


  • Link to post
    Share on other sites

    Posted · spiralize to the top?

    hey, thx for the replies :)! so its not hopeless yet...

    i will try the "swap at Z plugin" from PM Dude and also slicer and report back.

    i just need some time to get in touch with gcode (although i am printing multiply objects with small difference in height) :wink: , but this is a good way to start and learn some gcoding !


  • 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

      • 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
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...