Jump to content
UltiMaker Community of 3D Printing Experts

Dash lines on the top layer


pineirod
 Share

Recommended Posts

Posted · Dash lines on the top layer

Hi,

I'm still learning with the S5 printer.

 

Here two pictures of two parts (PCBs mockups); as one can see there are some dash lines on the top, even some smaller solid lines. 

 

Where do they come from?

 

I am using old PLA from a Prusa printer. The nozzle is 0.4AA, layer height 0.2 and I use the default speeds, temperature that Cura 3.6 proposes

 

Thanks

regards,

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Hi

    these lines are from travel moves over the skin.

    You can configure the behavior with setting "Combing" to "not in skin", then when printing the skin, the head will avoid the skin areas.

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Interesting as I have never used combing. Looking at your pic I suspect your retraction settings would benefit from a tune as a complementary or alternative option. I use 5.5mm for PLA/PHA and 6.5mm for  nGen. with a 0.4mm nozzle and running cool

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Ok,

    I will try these retraction options. I'm using pretty much the defaults from Cura, I understand they are optimized for the S5.

     

    Honestly I'm a bit surprised about this, because it makes the printouts look ugly with the standard settings

     

    cheers

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer
    31 minutes ago, pineirod said:

    I'm using pretty much the defaults from Cura

    Yes, and per default, combing is set to all.

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    I got some traces on the infill (picture attached); I didn't change the Combing option; is this from combing or maybe the nozzle is not well aligned? it seems to make a noise when traveling some times

     

    thanks

     

    2019-02-28 14.40.10.jpg

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    That's ok, traveling inside the infill area is without a retract, therefore you get some "noise" in the infill.

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Shouldn't it be cleaner?

    or if it doesn't retract it is faster?

     

    Here another picture, there are many of these "loose threads" making a very bad looking result. Why is that?

     

     

     

     

    2019-03-01 17.58.58.jpg

    2019-03-01 17.59.04.jpg

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    This example is an extreme one, there are too many retractions and retractions are limited for a specific extrusion distance. The setting is called "Maximum Retraction Count" and you can try to increase it a little bit, but not too much. The limit is important that your filament will not grind down due to the extensive retractions.

     

    The default setting is 25 for the UM3, so 25 retractions will happen, then it prints without retractions until the filament is moved enough to start over again with the retractions.

     

    Such a model is hard to print, you have to play with retractions, combing and print temperature to avoid oozing when traveling without a retract. 

     

    You can also check the setting "Max Comb Distance With No Retract", which defines the way the head can move without a retract.

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer
    3 hours ago, pineirod said:

    or if it doesn't retract it is faster?

     

    Forgot to answer this question: yes, retracting costs time and within the infill, it doesn't matter if there are some crumbles.

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Hi i have the exact same problem with the lines across my finished flat surface.

    The nozzle is 0.4AA, layer height 0.2 same as first pst.

    i will try the with setting "Combing" to "not in skin" and post results.

    1073238527_portcover.thumb.jpg.4e800f8ea477e401c7eac419ce4f6d75.jpg

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer
    23 minutes ago, JoeBarri said:

    i will try the with setting "Combing" to "not in skin" and post results.

    It will solve your issue, I am sure 🙂 

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer
    4 hours ago, JoeBarri said:

    Hi i have the exact same problem with the lines across my finished flat surface.

    The nozzle is 0.4AA, layer height 0.2 same as first pst.

    i will try the with setting "Combing" to "not in skin" and post results.

    1073238527_portcover.thumb.jpg.4e800f8ea477e401c7eac419ce4f6d75.jpg

     

    Ok, here is the result .  Much better.  Thanks

    1735651102_portcap2.thumb.jpg.900dccdb5edef026cb7126fc5e88660e.jpg

  • Link to post
    Share on other sites

    Posted · Dash lines on the top layer

    Thanks for the feedback!
    I'm glad it worked.
     

  • 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
        • 10 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
        • 16 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...