Jump to content
Ultimaker Community of 3D Printing Experts
levelhead

Should you be able to see retraction?

Recommended Posts

Hi, I recently bought an Ultimaker 2+ and am getting it tuned in. When I first was experimenting with retraction I was sure I could see the filament retracting in the Bowden tube above the print head. Today I noticed that I was not seeing the filament move there anymore. The extruder is retracting as I can feel it when gently holding the filament as it enters the extruder. For extraction to be working properly, should I be able to see the filament move at the head? My retraction setting are at the default speed and distance.

Thanks!

Share this post


Link to post
Share on other sites

It should not move at the head but if you look at the top of the arch of the bowden it should move from pushing hard on the "ceiling" of the bowden to gently resting on the "floor" at the top of that arch. In other words the pressure should be removed at the head but no actual visible retraction. If air gets in the nozzle then you get other problems.

Share this post


Link to post
Share on other sites

Yes. It's not mandatory. In fact if you measure how much it is moving up and down add that amount to 4.5mm and that should be your normal retraction. But it's better to just fix it. If you are lucky it will take all of 10 seconds. Remove the clip. Push down on the collet (the ring) and remove the bowden. Then while pushing down on the collet push the bowden back in and then lift firmly on the collet while pushing down (I found needle nose pliers help with this step) and then keep holding the bowden up and put the clip back on.

If this doesn't work cut off 3mm off the end of the bowden and try again.

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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 130 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 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!