Jump to content

Rough Texture on Lower Rounded-Edges

Recommended Posts

Posted · Rough Texture on Lower Rounded-Edges




Having some issues with rough rounded edges on 3DBenchy using Ultimaker 3. I am using Ultimaker PLA and the default cura settings for the material at 0.1mm. Any thoughts / ideas to try would be greatly appreciated.

Share this post

Link to post
Share on other sites
Posted · Rough Texture on Lower Rounded-Edges

Update: I tried slowing the print down, especially on earlier layers, and the problem isn't as severe. However, now all lower portions of the print have a rougher texture that corrects about halfway up. Not sure where to go from here.

Share this post

Link to post
Share on other sites
Posted · Rough Texture on Lower Rounded-Edges

Hi there,

Underside curves can be tricky. Sometimes/often it is the radiated heat from the headed bed itself that causes the roughness. That is why it goes away higher up.

In the past, I have worked around the issue by printing on a cold bed with blue painters tape (wiped with alcohol), and/or printing with thicker layer heights (0.15 or 0.2). But these are very old school techniques and not really a solution that shows off your printer's awesomeness. :) I know the UM2/3 can do much better.

Maybe try lowering the bed heat after the first layer is put down? Maybe try that in combination with slower. Generally slower = better prints. Also maybe try lowering the nozzle temperature by 5-10 degrees after the first layer. Most PLAs can tolerate that.

I suppose raft might technically help too, but that feels like another ugly hack to me.

Beyond that I never really solved it though. I just got good enough and moved on. But I am positive others on this forum know how to address it properly.

Anyway, I hope this helps and maybe gives you some ideas to play with.

Good luck! :)

  • Like 1

Share this post

Link to post
Share on other sites
Posted · Rough Texture on Lower Rounded-Edges

I also have this on overhangs. It seems to come from edges of overhangs curling upwards, and then being pushed down irregularly when the next layer is printed.

Printing cooler helps, but does not totally cure it. What also helps, is placing a fan in front of the printer, or blowing with a gentle stream of compressed air on the affected parts (especially for very small parts, not practical for large parts).

Sometimes you can go down to 190°C at default speed of 50mm/s for PLA, depending on PLA brand, color, state of the rest of your machine (eg. teflon coupler), and the friction or unwinding resistance in the spool.

Printing slower generally improves model accuracy, but I do not know if it has an effect on overhangs, I haven't tried that.

Share this post

Link to post
Share on other sites
Posted (edited) · Rough Texture on Lower Rounded-Edges

Hi Folks,

Had the same thing happen when I printed the Benchy boat with my UM2 ..

Only thing that's removed all of this was to turn off the heat bed and using glue. Try this and you'll have a premium print!

It's the heat from both, -the bed and the nozzle. This often occur when printing detailed objects with overhang close to the bed bottom.



Edited by Guest

Share this post

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

    • Survey: Understanding your workflow
      Interact with future concepts and aim to collect your feedback and opinion. In particular, if this would/could be a welcome addition to your 3D printing workflow. Interested?
      • 0 replies
    • Coronavirus: Let's do our part
      Through this post I would like to further explain what we are doing, and what you could be doing. 
      Our efforts consist of 2 layers. First; connect medical institutions and hospitals to (local) 3D Printing hubs to help them print parts of which a 3D model already exists. And second, contribute to design the necessary part and then have it printed via a (local) 3D printing hub. Experts are available from within Ultimaker and from within our network of 3D printing experts.
        • Like
      • 46 replies
  • Create New...

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!