Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
nailcannon

What could be causing this inconsistency?

Recommended Posts

https://drive.google.com/file/d/0B0NkngkTIDmYR3VKanZhS3J4bjg/view?usp=sharing

 

I've been trying to print but it keeps extruding very unpredictably. It's Gizmo Dorks white PLA printing at 220 and 30mm/s. It's not skipping, at least i dont hear the sound of the feeder skipping. I'm really hoping it's not the filament being an inconsistent diameter. Any advice is much appreciated.

 

 

Share this post


Link to post
Share on other sites

I don't think it's the diameter as it would have to vary by about 2X to get that kind of 50% underextrusion.

Either the filament is slipping in the feeder or the feeder is skipping backwards. The first layer is the hardest to get perfect because it's easy to be a little too close to the glass such that it's over extruding and pressure builds for a long time and suddenly skips. Or it could be too far from the glass such that you aren't extruding enough - but it should be more consistent. I'd be very curious to see if the problem goes away on second layer. If so it's a leveling issue.

I suspect it's neither issue and that you just have slippery filament. Maybe tighten the feeder tension screw so it holds the filament tighter? How deep are the holes in the filement created by the feeder? You want them pretty deep like image on right:

 

filament1

 

Share this post


Link to post
Share on other sites

I suspect it's neither issue and that you just have slippery filament. Maybe tighten the feeder tension screw so it holds the filament tighter? How deep are the holes in the filement created by the feeder? You want them pretty deep like image on right:

 

It would seem that may be the issue. the holes are rather shallow. I'll tighten it and test tonight when i get back home. A follow up question. I make a lot of models so naturally my prints require quite a bit of retraction. But the constant retraction is making the feeder grind the filament down and stop extruding. what settings would you recommend to best counteract this while still retaining good quality?

 

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
Sign in to follow this  

  • Our picks

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
       
      • 31 replies
    • 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!