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

PLA making grinding noise in bowden tube when retracting

Recommended Posts

I've been having problems with some prints that require retraction. I'm currently using 40mm/s retraction speed and 4.5mm of length.

Sometimes when I print with retraction, I notice gaps in some parts of my print. I think this happens because the filament isn't through the nozzle yet after the retraction ends... Also I'm noticing a subtle grinding noise coming from the bowden tube everytime it retracts... Is this normal?

I have found that I can usually get rid of the gaps by heating the PLA to 225 degrees, but I would love to get some feedback from a more experienced user.




Share this post

Link to post
Share on other sites

I prefer lower temps with retraction:


I haven't noticed a grinding noise but that doesn't mean I don't have it also.

Note that 40mm/sec is a little faster than the extruder can reasonably spin. But there was a bug in Marlin such that it didn't matter because Marlin was moving the filament much slower. But if you have the latest Marlin and are still using 40mm/sec for extrude/retraction speeds that might be a problem. Illuminarti wrote a blog entry about this somewhere. I'm not sure what a reasonable speed is. Probably 20mm/sec.


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 Contest | Entourage 01.
      Presenting an idea, an architectural design or something as big as an urban project isn't easy. A scaled models can really help to get your idea across. But besides your main model, there is more needed to get your idea across vividly! An architect regularly uses various entourage sets to help bring these ideas and models to live. 
        • Like
      • 9 replies
    • What The DfAM?
      I'm Steve Cox, an experienced engineer familiar with 3D printing. I wanted to share some DfAM guidelines with this community to help and make stronger parts.
      I'm also an Autodesk Certified Instructor for Fusion 360, so many of the images in ...
        • Thanks
        • Like
      • 17 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!