Jump to content
Ultimaker Community of 3D Printing Experts
pluggedIN

top is not printing, calibration or STL issue?

Recommended Posts

Hello Again!

I've been trying to print this: Low-Poly Pikachu

90% of it comes out great. The top, never finishes.

IMG_20171005_184443.thumb.jpg.44b2c2c9c60363f39b419c3bc50963cb.jpg

I can't quite explain what is happening. It's almost as if the back part of the head gets printed "higher" and the nozzle knocks into it. It's weird. Every thing else comes out great on super fine setting in cura. So is this some kind of nozzle adjustment issue, or is this just becuase of something in the STL? This happens weather the gcode comes from Cura, or from Simplify3D.

Thoughts on what to try?

IMG_20171005_184443.thumb.jpg.44b2c2c9c60363f39b419c3bc50963cb.jpg

Share this post


Link to post
Share on other sites

So overhangs do this - they get raised edges on the edge that is overhanging air. Even on a mere 45 degree angle.

You need to do 2 things:

1) 100% fan. Max fan. Maybe add more fan. this helps quite a bit reducing the raised egdes to a minimum.

2) Make the part stick like hell to the glass. This is probably the only thing left for you to do. You should be able to pick up the printer with that little pikachu. More details in this video - I know it's a long video but it's packed with useful info:

Share this post


Link to post
Share on other sites

I have noticed that curling on edges with some filaments will create this issue.

In addition to gr5's suggestions, which the starting point, try to cut back on the print temperature and slow down the printing. This will make the heat differential less of an issue and let the fans sit on the part longer.

  • Like 1

Share this post


Link to post
Share on other sites

I like that video! I cleaned off my glass plate better. Also, I took kmanstudios suggestions and printed slower and 5 degrees lower. Much Better!

glob-ears.thumb.jpg.f6515cec12da7fc3f56307d4016d9ec5.jpg

So now I have the tangential question of those ears. How to make them less globby?

I also have an even more tangential question. I downloaded the gears from gr5's video. The gears did not rotate because of squish.

gear-bottom.thumb.jpg.a7f7ec08a58ed7fa68564e3587bc4f1b.jpg

I only printed a few millimeters of the gears before stopping, and this pic is looking at the bottom. Instead of leveling the plate higher for less squish, can i change the flow out of the nozzle that would print the gears better?

glob-ears.thumb.jpg.f6515cec12da7fc3f56307d4016d9ec5.jpg

gear-bottom.thumb.jpg.a7f7ec08a58ed7fa68564e3587bc4f1b.jpg

Share this post


Link to post
Share on other sites

The gear thing is already round so doesn't need quite as much squishing and it's also small enough that you should be okay with very little squish.

Alternatively there is an awesome feature in cura 2.7 - search for "horizontal".  It's something like "horizontal expansion first layer only".  Set that to about -.25mm and it will take care of your problem in the gear pictures.

As to the ears - that is due to not enough cooling.  Really the easiest solution is to print two pickachus in "all at once" mode - not "one at a time" mode.  Or print a 15mm square tower that is a few layers taller than pikachu. This allows one pikachu to cool while printing the other - it only needs a few extra seconds.  This makes a huge difference in ear tip quality.

Edited by Guest
  • Like 1

Share this post


Link to post
Share on other sites

Alternatively there is an awesome feature in cura 2.7 - search for "horizontal".  It's something like "horizontal expansion first layer only".  Set that to about -.25mm and it will take care of your problem in the gear pictures.

I have NO idea what that horizontal feature does but it worked great! I used to be a huge Simplify3D fan, but Cura is slowly luring me back.

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

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 95 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 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!