Jump to content

Uneven first layer on UMS3 Prints


skjbTHI

Recommended Posts

Posted (edited) · Uneven first layer on UMS3 Prints

Hello,

 

I've noticed on a number of prints from our UMS3 that the first layer seems to be a bit uneven. When this happens on the corner of prints, I'm usually able to solve it with the typical anti-warping tips and tricks (adding chamfers to the 3D file, putting glue on the build plate, etc). But I've noticed more recently that it seems to be happening away from the print edges in some cases. In the attached photos, I think it's most clear in the blue print - tough to get a good image of this with the lighting in my office, but even in the gray prints (paused after first layer went down) I can see a few features which look to be uneven, not flush with the build plate. I've hypothesized that it could be due to uneven layers of glue on the build plate, but I have noticed this even after thoroughly cleaning the pate. For typical prints this isn't an issue—the blue part functioned fine—but there are other times when it seems this uneven-ness propagates through subsequent layers, or else times when we need the smooth bottom layer for the functionality of the print.

 

Since I have experienced significant warping issues when printing PLA on this UMS3, I typically make the following alterations to my initial layers:
Increase initial layer height (by roughly 20%)

Increase initial layer flow (Cura default is 120% for initial layer, I up to 130%)

Initial layer temp +10 degrees from normal print temp

Initial layer build plate temp +5 degrees from normal

Initial fan speed of 0, regular fan speed at 0.65mm

Initial layer print speed roughly 25% normal print speed

Brim (with brim size increasing with print size)

 

 

These alterations have positively affected the warping isseus, but could these or other factors affect the "flush"-ness of the initial layer with the bed? 

  20210329_121118.thumb.jpg.c9ca7210c9340258efcf307affa11238.jpg20210329_121056.thumb.jpg.db93c21969e6d844bbda318539857119.jpg20210329_121054.thumb.jpg.f884b2acfd4c36f176517e94e6b57ad2.jpg

Edited by skjbTHI
  • 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...