Jump to content

Cura 4.8 bug?


gregr

Recommended Posts

Posted · Cura 4.8 bug?

I just sliced a new design.  It's fairly simple.  A 30x230 mm cylinder with M18 threads cut into each end.  The cylinder showed the internal threads in cura, but when I printed it, it printed solid with no 18mm hole or threads.

 

The stl file is fine as far as I can tell.  A similar design printed fine at 240mm with identical settings.  I created a shorter one to fit my printer better.

 

Just logging it in case it pops up elsewhere.  The one with the problem was printed vertically.  I'm going to try it horizontally and see if the threads are there.

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    Ok, I did a couple of tests.  First, the same stl file printed the internal threads when the object was horizontal.  Too bad they are threads and a cylinder that need to be printed vertically.

     

    Next, I reloaded the stl and looked at the preview, and in fact the internal cylinder and threads appeared as infill, which is how it printed (no top or bottom layer, just exposed infill).  I guess I missed that the first time.

     

    I then loaded 4.7.1 back and it renders fine.  So it is definitely a bug in 4.8.

     

    Let me know if you want the stl.  Like I said its pretty basic and it would probably be faster to design one than wait for me to send it.   I designed it in fusion 360 if that means anything.

     

    I'm sticking with 4.7.1 for now.

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    Ok, I did a couple of tests.  First, the same stl file printed the internal threads when the object was horizontal.  Too bad they are threads and a cylinder that need to be printed vertically.

     

    Next, I reloaded the stl and looked at the preview, and in fact the internal cylinder and threads appeared as infill, which is how it printed (no top or bottom layer, just exposed infill).  I guess I missed that the first time.

     

    I then loaded 4.7.1 back and it renders fine.  So it is definitely a bug in 4.8.

     

    Let me know if you want the stl.  Like I said its pretty basic and it would probably be faster to design one than wait for me to send it.   I designed it in fusion 360 if that means anything.

     

    I'm sticking with 4.7.1 for now.

     

    Ok, I just noticed I could upload.  here is the stl

    handle-sect-230.stl

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    I sliced it as well with 4.8.  Has open threads top and bottom, same as shown by Greg V.

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    Hmm, ok, there was something unusual in the slicer settings.  10 wall layers and 6 top/bottom, and fwiw, 75% gyroid fill.  This may be overkillm, but the part prints like a rock.  It will be used as a harpoon, so needs to have weight and good impact resistance.  

     

    Glad to hear it worked for you.   I'll try it again when I get a chance, maybe play with the layers and fill.

     

    Thanks for looking into it!

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    Oh, and here is the gcode file that shows no threads or internal hole.

    handle-sect-230.gcode

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    Reviewing your Gcode file the model sliced perfectly.  You asked Cura to "Remove all holes" and it did.  No problem.

  • Link to post
    Share on other sites

    Posted · Cura 4.8 bug?

    This is a follow-up to my last post when I was having difficulty getting Cura 4.8.0 to connect over USB to my ANET A8 printer.

     

    Great news.  I got Cura working, thanks to an excellent YouTube video. It was short and directly to the point, with complete instructions for fixing it. The video is "How to fix Cura or Slicer Not CONNECTING to 3D Printer Creality Ender 3?" by Joseph-Israel.

    Turns out that Cura doesn't allow long enough for the Marlin 1.1.9.1 FW to initialize
    on the ANET A8 8-bit board. The following modification will tune Cura to wait longer
    to connect after it reboots the printer.

    Inside file C:\Program Files\Ultimaker Cura 4.8.0\plugins\USBPrinting\AutoDetectBaudJob.py

    Change:
    wait_bootloader_times = [1.5, 5, 15]
    To:
    wait_bootloader_times = [5, 15, 30]
     

  • 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
        • 18 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...