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

Extruder constantly extrudes

Recommended Posts

Assuming that the extruder gear isn't turning constantly, then this is just the natural ooze that happens due to thermal expansion and/or gravity.

You need to be sure to prime the extruder when starting a print by pre-extruding a few mm as part of your starting gcode and/or printing several loops of skirt, to make sure that the melt chamber gets filled back up with plastic before you start printing your actual object.

But apart from that, it's harmless, and can be ignored.


Share this post

Link to post
Share on other sites

Assuming there is nothing wrong with your ultimaker (and there might be..), then you should also be aware that the faster you print, the higher the pressures get in the print nozzle so that when you want to stop printing, it keeps coming out.

The way to fix this isn't necessarily to print colder because then the pressures get higher. On the other hand colder means "more like toothpaste" so colder can help.

A better way is to print slower. Having said that, 210C at 40mm/sec with .2mm layers is reasonably slow enough that you tend not to get too much leakage but if you are unhappy with the quality then try 25mm/sec or 15mm/sec and just be patient and wait for that print.

Also there is a feature that should be on by default i believe called "retraction". This tries to immediately remove all the pressure in the nozzle and is used when the head is jumping over a spot that should have no extrusion but is outside the print. When retraction isn't working quite right we call it "stringing".


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!