Jump to content
Ultimaker Community of 3D Printing Experts
Crcic

How to fix the issue about gaps

Recommended Posts

The Main Cause of this is the PTFE coupler. (the white part under the sprint in the hotend.)

After a while It starts deforming and causes under-extrusion.

The way to see if this is an issue it to remove it and visually inspect it.

It could be that you are just trying to print to fast. What speed are you printing at?

another cause could be incorrect feeder tension / slipping.

I would suggest you read THIS and THIS

Share this post


Link to post
Share on other sites

Usually, 50-70mm/s.

I find the main issue is the feeder wheel will go back sometimes.

The Main Cause of this is the PTFE coupler. (the white part under the sprint in the hotend.)

After a while It starts deforming and causes under-extrusion.

The way to see if this is an issue it to remove it and visually inspect it.

It could be that you are just trying to print to fast. What speed are you printing at?

another cause could be incorrect feeder tension / slipping.

I would suggest you read THIS and THIS

Share this post


Link to post
Share on other sites

Yeah the feeder skipping back will cause under-extrusion in the area that it skipped back.

It normally skips back if the speed is to high for the temp. Or if there is something causing to much pressure built up like a blocked nozzle or deformed PTFE Coupler.

Try a few Atomic pulls to clean the nozzle as well.

Share this post


Link to post
Share on other sites

I tried several times cleaning nozzle, but it doesn't work.

Also I test PTFE Coupler, I can use material to get through without any resistance.

I am so confused about solving this issue.

Yeah the feeder skipping back will cause under-extrusion in the area that it skipped back.

It normally skips back if the speed is to high for the temp. Or if there is something causing to much pressure built up like a blocked nozzle or deformed PTFE Coupler.

Try a few Atomic pulls to clean the nozzle as well.

Share this post


Link to post
Share on other sites

If you are sure that it is not a blocked nozzle or deformed PTFE coupler and extrusion by hand is smooth. Check you bowden tube it there is nothing inside, sometimes some strands of PLA get in there when you change material. You can also manually try to push some material through at the side of the extruder when it is not holding on to the material.

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

Announcements

  • Our picks

    • Architect Design Contest | Vehicles.
      We're open for entries! - Design and submit your 3D designs of architectural entourage - vehicles - for a chance to win a large filament pack. Presenting an idea, an architectural design or something as big as an urban project isn't easy. A scaled model can really help to get your idea across.
        • Like
      • 24 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
      • 22 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!