Jump to content

Print head occasionally grinds across the infill


jrd7777

Recommended Posts

Posted · Print head occasionally grinds across the infill

I'm fairly new to 3D printing, but am able to create adequate proto-types for my audio work.  We print a lot of flat, 12mm thk, "speaker cabinet" walls.  Sometimes we print flat, sometimes we stand the "walls" and thereby print "narrow", tall components.  I had originally thought there was some “build-up issue” associated with a tall configuration, but the grinding happens when we print components "flat" or "tall".  I studied the printer as it was printing and recorded the approximate layer at which the "grinding" was especially bad.  On 99.5% of the "passes" the print head lifts, translates, and restarts printing when it reaches its destination.  However, on or near layer 159 the grinding was especially bad.  So I wondered if it was in the gcode... I used the Preview tool in Cura and found this.   Blue arrows point to "skipped" portions.  The red arrow points to the "print head" and in the direction of travel across the speaker wall.  You can advance the "simulation" and watch the print head "retreat" back to these blue arrows and "fill in" the missed lines.  During this "retreat" is when the nozzle interferes with the existing infill creating the grinding sound.  I watched this behavior happen on a few other layers and, no question the z-motors are not lifting the head.   I have to think this is a Cura, infill-gcode creation issue"?   I’m using Cura 4.8 as my slicer…  need to update at some point but this work fine for our applications.

image.png.c3684cb54654897d0c4e075f3046bd12.png

 

I've included a second and third image to show the print head "retreats" to the blue arrows to complete the infill on this layer...

image.png.d802186f07209621e153da123fc6156a.png

image.png.818f268d1ecb880cb758bb93d95540a0.png

Any ideas on how to address this or compensate for this occasional, "retreat and drag" issue?

 

  • 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. 
         
        • 7 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.
        • 0 replies
    ×
    ×
    • Create New...