Jump to content
Ultimaker Community of 3D Printing Experts

How to prevent those surface dimples


Recommended Posts

Posted · How to prevent those surface dimples

Print slower.  I know we all want to print faster but if you are patient you will be rewarded.

 

some dimples can be fixed by tweaking the retraction distance as well but if these are where layers start then probably not in this case.

 

There is a trade-off between speed/dimensional accuracy/beauty.  If you want beauty you really need to print the outer surfaces slow.  If you only care about dimensional accuracy you can't print faster.  Once you get parts looking really beautiful then you can start learning tricks to speed things up.  There are dozens of tricks.  For example gradual infill, faster speeds on inner layers.  No infill at all usually works quite well also - surprisingly well.  thicker layers, wider layers/larger nozzles, no support, custom supports, etc.

  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples
    8 hours ago, gr5 said:

    Wait - layers should not start on an outer layer, right?  Maybe that's where the outer shell starts and ends?

     

    I think it always starts inside, then the inner wall then prints the outer wall.

     

     used the ultimaker 2+ 2 years ago and I swear I never saw those issues.

  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples

    Well  I guess layers will start on the outer layer if one were to specify walls before infill and outer wall before inner wall(s). Also I cannot but help think, never having done it, that specifying 0.4mm line width with a 0.8mm nozzle is not going to help. Certainly the result is up the gumtree. Given that you seem to have some dubious settings it will help us if you post all your main and relevant settings, rather than us making assumptions and guessing.

  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples

    You could also turn off coasting if you have that enabled...someone suggested that to me a while back

  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples
    On 5/29/2018 at 7:24 PM, cekuhnen said:

     used the ultimaker 2+ 2 years ago and I swear I never saw those issues.

    Definitely try cura 15.4.  I still use it sometimes for my UM2.  A very nice slicer.

  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples
    18 minutes ago, gr5 said:

    Definitely try cura 15.4.  I still use it sometimes for my UM2.  A very nice slicer.

     

    When using an older Cura version do you also have to flash the older firmware?

  • Link to post
    Share on other sites
    Posted (edited) · How to prevent those surface dimples

    I would say NO.

    That's how I understood it: Roughly speaking, the machine receives only control commands which must be processed sequentially, such as: Move at Z-point from A-point to B-point at S-speed and E-extruder-speed, etc. So even a device with old firmware should always understand the basic commands (GCodes) of a current Slicers.

     

    Firmware updates mainly improve the usability of the machine (user interface) and correct known errors in it. That's why it's always useful to upgrade to the latest available version!

     

    I also suspect GCodes are not re-invented every day and added to a firmware, so this is mainly about the command interpreter understanding and executing the basic command set properly. Special GCodes are most likely not critical to the basic process of printing. Special GCodes that do not understand every machine are recognized as special commands by the respective machine and processed. Machines that can not handle this special GCode simply ignore these commands, I think. And other known slicers probably use only the base GCode instruction set so they can be used universally.

     

    I use my Ultimaker2 with Cura v15.04.6 as well as with Cura v3.3.1. As firmware I used the last official version known to me and available. And for some time the almost ingenious Tinker firmware v17.10.1 Aka Tinkergnome. So far, I could easily switch between the Cura versions and firmwares.

    Edited by mnis
  • Link to post
    Share on other sites
    Posted · How to prevent those surface dimples
    On 5/31/2018 at 4:25 PM, cekuhnen said:

    When using an older Cura version do you also have to flash the older firmware?

    No.  Definitely not.

  • 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

      • Talking additive | The 3D printing podcast
        Why should we be the only ones asking questions? Join us and ask Jabil all your questions on September 22nd 5pm CET
          • Like
        • 3 replies
      • Ultimaker masterclass: Optimizing your Ultimaker Cura workflow
        Save your seat for either broadcast on September 23.
        What will you learn?
        · Best practices for iterative print preparation and every lesson you should learn from each print
        · The right way to use per-object settings and when they are most useful
        · Easy-to-use resources for anyone who wants to develop their own printer definitions, plugins, or print profiles
        · How to optimize print profile settings and whether to “keep” or “discard” changes
        · When is the right time to export your drawing from CAD? (Based on Ultimaker Cura’s surprising power as 3D control software)
        · And a whole lot more tips and tricks!
         
        How can I join?
        This free masterclass will take place twice:
        1. 11am CEST (5pm SGT, 5am EDT)
        2. 5pm CEST (11am EDT, 8am PDT, 11pm SGT)
          • Like
        • 0 replies
      • Do you use 3D printing at work? Let us know
        It doesn't matter if you are using 1 Ultimaker or 10, there is inspiration in everything. We're looking for ...
        • 1 reply
    ×
    ×
    • Create New...