Jump to content
Ultimaker Community of 3D Printing Experts
ScanHD

What could cause this?

Recommended Posts

Heloo everybody, 

My printer has been flat out on decorations and models for the kids this Christmas, but my latest print wasn't so successful... 

DSC_0574.thumb.JPG.37e79241099e8501b98c223287c5ba63.JPG

 

What could cause 3 out of 5 front right moose legs to fall off like that? All seem to have happened at exactly the same way. But 2 are uninjured. 

 

Any ideas? 

Share this post


Link to post
Share on other sites

Maybe they just came loose from the build-plate, and started to wobble? Edges on overhangs tend to curl up, and then at the next pass, the nozzle might brutally bang into those curled-up edges.


I am guessing here, but I have had something similar happen during overhang tests. See the pics: here they curled up ca. 1.5mm, for a layer height of only 0.1mm! Increasing the feet (the mickey mouse ears) and making them a little bit higher, should improve bonding. Printing cooler and in thicker layers, should reduce curling. At least, it did for me.

 

At least, it allowed me to make nice spaghetti photos.

 

support_test10.thumb.jpg.fd6dcb71d58e11b90f581668c06997b7.jpg

 

DSCN5681b.jpg.0e18770ab554bd72031ac2e10ea7f54e.jpg

 

DSCN5686b.jpg.a9820bddeaf6d37b7dd30feb5f4de786.jpg

 

 

Share this post


Link to post
Share on other sites

If this is ABS filament then I have a different answer.  But more likely this is PLA and the legs are just not attached well enough to the glass.  Maybe add some gluestick and then thin the layer a LOT with a wet tissue.  You want a layer so thin you almost can't see the layer of pva glue.  Also maybe make the bottom of the feet a little flatter (there is an option in cura settings to not have it always set Z position to zero and then you can position the reindeer at -0.5mm).

Share this post


Link to post
Share on other sites

thanks for the tips guys!

 

Yes the overhang may well be the culprit! kinda makes sense as where they fail is just where the overhang is starting to get big.

 

Indeed it is PLA, and i use a very thin layer of glue spread with a wet sponge i find works well. Im pretty sure its not bed adhesion issues as they are still well stuck to the bed when its time to remove them!

Share this post


Link to post
Share on other sites

I also agree, This has happened to me a lot, and tends to happen when joining the solo object to the main body. its the curled up edges simply getting knocked. and as the base is so fragile, it simply topples over. tends to be random, but also happens more when printing cooler. i think base adhesion is not that relevant, its the contact with the base being smaller than the join with the body causing this. if you turned the legs upside down it wouldn't happen as much. its the heavy head. this rarely happens on the um2 which has a much lighter head and not as much impact when it hits something. 

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!