Jump to content
UltiMaker Community of 3D Printing Experts

Inconsistent base layer


Recommended Posts

Posted · Inconsistent base layer

Hi,

I printed out a few parts last night and when they were finished I noticed that a couple had a strip, about an inch wide, where the print was raised, inconsistent and of a generally bad quality. I'm not sure if it's a build plate heat distribution issue or something along those lines. I'm new to this so just guessing at the moment.

Does anyone have any advice?

Any help is greatly appreciated.

p.s. I've taken a photo but don't know how to attach it to the post.

 

  • Link to post
    Share on other sites

    Posted · Inconsistent base layer

    Click on gallery on the top left of this page, then the big blue UPLOAD button. Then after you finish uploading picture post a new topic and click "my media" next to smile icon.

    It could be many things - most related to leveling. If leveling leaves too big a gap then the PLA doesn't stick well and kind of falls down onto the bed - you want it squished. It leveling leaves too small a gap and you have a UM2 then the extruder will skip because it can't get all that PLA in such a small gap but the skipping will cause underextrusion. Picture would help.

     

  • Link to post
    Share on other sites

    Posted · Inconsistent base layer

    Thanks for the advice :smile:

     

    The raised strip ran from the front of the bed toward the back about 100mm. going between two separate parts (one of which is below).

     

    Print Prob Base

    I've printed since I had the issue without problems. Which is a good thing I guess. I would like to understand the problem though.

     

  • Link to post
    Share on other sites

    Posted · Inconsistent base layer

    Wow! Never seen that before! It's so... consistent!

    Is your bed lower there?

    Could it be that the gantry moves the head up in that region?

    This is not a STL issue because it would have outlined the higher region - but it didn't.

    Is this a UM1 or UM2 or another printer? Something seems to be raising the print head higher as it travels over this location. I would push the head around back and forth over this region and see if something causes the head to lift a tiny tiny bit (only about .1 to .2mm I think).

    Does this strip correspond to a particular slice of blue tape?

    I really think this is a gantry issue.

     

  • Link to post
    Share on other sites

    Posted · Inconsistent base layer

    Thanks for the fast reply.

    It's a UM2. only had it a few days.

    I wasn't present when it was printing in these areas so didn't see what was happening. I have scanned the bed with my infra-red thermometer and the heat seams consistent throughout.

    I have since printed on the same area of the bed without issue (bed is flat). There doesn't seem to be a mechanical issue with the gantry either.

    I used glue not tape. Would you recommend tape over glue?

    Could it be that the movement of the head put tension on the filament causing it to pull back slightly in these areas? I can't see how that would happen really, I'm just trying to think around the problem.

     

  • 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
     Share

    • Our picks

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
         
         
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
         
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
         
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
         

         
        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 11 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
         
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 17 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    ×
    ×
    • Create New...