Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
charles-design

Where am I going wrong? - Under-extrusion

Recommended Posts

Hi there,

So I made the change to Roberts extruder but after a few test I'm yet to get a decent result out of it.

The green print (Poor Quality Filament) was made using the stock extruder and the clear print was with Roberts.

After this I repeated the test with both higher and lower tension, both of which came out worst.

Am I missing out on a trick to get the tension right?

Is the correct tension in a very small bracket?

Most of the time it's printing the skirt fine but starts under-extruding on the actual print.

Many Thanks,

Charles

IMG 4140

 

Share this post


Link to post
Share on other sites

Well, I'd say it's because you have the spring tension too loose or too tight.

I found it useful to make a small "coin" test print, say 25mm diameter and 2mm thick, .1mm layers, 55mm/s, 100% fill: it takes only a few minutes to print and each layer fill is a decent test of regular extrusion. I also used a loose length of filament say about a meter beyond the feeder, to eliminate spool binding as an influence. I backed off the spring screw to the min force then started off the print, tweaking it clockwise a quarter turn at a time until I got consistent fill.

Once I was happy with the coin I returned to the above extrusion test and got perfect results all the way to the top.

Oh, and it helps to take the time to get the bed levelling spot on. Otherwise that too could be an influence.

 

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!