Jump to content
Ultimaker Community of 3D Printing Experts
TheKrakenWakes

Problems All Of A Sudden - Poor Prints

Recommended Posts

Hi

 

Ive had my Ultimaker 2+ for about six months and ive been printing relatively troublefree apart from some odd tinkering with settings.  

 

Recently though im having a lot of problems.  Rigid Ink ABS has always been my preferred material on my flashforge dreamer and Ultimaker but now im getting poor prints with large seams.  I also tried their PLA and got very poor results compared to the same model printed in Ultimaker filament.  Can anyone offer any advice please? 

 

Problem 1

The green model is printed in ABS at 235, 30 mm/s.  I got rid of the seam (never seen one so big) by changing start points to random and also increased the layer height to .1mm  but im still getting wobbly marks where the gap is and when I print more than one at a time it breaks apart where the model gets thinner at the top.  Other settings are pretty much stock for .1mm apart from a slower print speed which helped improve the top of the model from pic 1 to pic 2.  

 

The red model is printed in Rigid Ink PLA and the silver next to it has the same stock .1mm layer settings from Cura apart from a lower print temp.  Silver is at the printers standard PLA settings, the red one is at 185 as per Rigid Inks suggestion.  

 

thanks

20180406_201642.jpg

thumbnail_20180408_115524.jpg

20180406_170445.jpg

20180406_170441.jpg

20180406_170449.jpg

Share this post


Link to post
Share on other sites

These "errors" in the red print are very tiny - much smaller than the eye should be able to see.  So how do we see it?  With glint.  Having a light bulb in the ceiling and holding the piece such that tiny changes in angle have large changes in contrast which let you see these errors.

 

You don't see the errors in the gray because it doesn't have the same kind of shiny sheen to it.  It's more Matte.  Also, it's a lighter color making the glint have less contrast.  

 

So one solution is to spray paint your prints.  First coat should be a primer - I like automobile primers which are designed to stick to both metal and plastic.  Then use a Matte color on top.

Share this post


Link to post
Share on other sites

Thanks for your advice, appreciate the light does highlight issues on that filamant more than on the silver but there are definitely more imperfections on the red model which are visible to the eye when not in direct sunlight etc. I think i angled them like that to highlight them a little more for the picture. 

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

    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 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!