Jump to content
Ultimaker Community of 3D Printing Experts
jofleck

Cura 3.2.1 Underextrusion after retraction

Recommended Posts

Hey folks, 

I own an ultimaker 2 for a while. Usually Im using simplify3D + Octoprint for slicing. Now I gave Cura 3.2.1 a try because I really like the octoprint integration and the tree supports are absolutely awesome. However I have problems when Im printing objects which needs a lot of retractions. I am experiencing underextrusions every few layers so I can break the model really easy. Currently I'm printing at 0.1mm layer height with 40mm/s and 20mm/s inner and outer wall speed. I'm retracting 4mm at 25mm/s (Same settings as in simplify3D). 

 

I played around with speeds, other filaments (I'm printing PLA) and temperatures. Nothing helped except slicing the model with simplify3D. 

 

Do you have any Ideas? 

 

 

Edited by jofleck

Share this post


Link to post
Share on other sites

Hey folks, 

I resolved the problem. Maybe someone has the same problem. So here is the solution:

 

I installed Cura on another Computer and tried it. On this machine everything worked fined with the default settings. So I enabled all settings and compared them with the settings on my primary computer. I noticed that the initial layer temperature  was always 20°C hotter than the normal temperature (This setting was hidden). In my Case 230°C for the initial layer was to hot. When the printer began to retract about 20 (!!!) layers later, suddenly liquid filament dropped out and after this I had underextrusion the next few layers. 

 

I have no explanation why the initial layer temp was alway 20°C more. I reinstalled Cura and deleted all corresponding files. Now its working like a charm :)

 

But really, really interesting that a to hot temperature can affect the print even 20 layers later....

 

 

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

    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies
×

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!