Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts
JohnFox

Suspect some charring using white ABS

Recommended Posts

I am using white ABS supplied by 3D Prima, running on an UM2 at default temperature settings of 260C. From time to time I get brown colouration on the bottom two or three layers. I suspect that this is due to the ABS starting to char.

Is it worth trying to drop the temperature at bit or will this lead to other problems?

Oddly, this doesn't seem to occur elsewhere on the print.

thanks

John

Share this post


Link to post
Share on other sites

Hi John,

I sometimes get small inclusions of dark char like deposits within a white print. Whenever I've watched this happening it's source has been the outside of the nozzle and not from within.

Check the nozzle surface is clean before starting a print. Any small pieces of filament that are stuck to the outside can release after its gone through a few heating and cooling cycles which then get embedded in the print.

This is far more noticeable on a white print due to the contrast.

Share this post


Link to post
Share on other sites

Thanks, sorry I didn't respond sooner.

I've changed to PLA and am getting the same charred bits. It isn't from the outside as I keep the nozzle pretty clean but I now see them fairly frequently at the start of a print, they usually are all out by the time it has printed the brim. They seem to build up within the nozzle and are disturbed when the nozzle cools down and heats back up again.

I've started to do a dummy print in the same run before any important ones in order to get hem out.

 

Hi John,

I sometimes get small inclusions of dark char like deposits within a white print. Whenever I've watched this happening it's source has been the outside of the nozzle and not from within.

Check the nozzle surface is clean before starting a print. Any small pieces of filament that are stuck to the outside can release after its gone through a few heating and cooling cycles which then get embedded in the print.

This is far more noticeable on a white print due to the contrast.

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

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
       
      • 7 replies
    • 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!