Jump to content
Ultimaker Community of 3D Printing Experts
xrstokes

Feature request

Recommended Posts

I'm having some warping issues on larger petg prints. A nice sized brim fixes it 50% of the time. Some times, the brim can't hold it down and it tears. Other slicers have an option to have the brim print for the first 2 layers. Can someone add this to the feature request list. 2 layers are still easy too cut off, but helps pin it too the bed. If there is a work around or plugin though, that would be great.

Thanks 

Share this post


Link to post
Share on other sites

Well you can make the bottom layer thicker - there's a "bottom layer thickness".  

 

I've never had this problem with petg.  My problem with petg is it sticks too well.  So well that it lifts pieces of the glass off and I get glass shards in the bottom of my petg prints.  I use a very very thin layer of PVA (I like to mix wood glue and water but there are other ways to do this).  Also stick your petg in hot water and see where it softens and make sure the bed is above this temp.  This will allow the bottom layer to warp just the tiniest bit (< 0.1mm) and spread the load (relieve the strongest stresses).

 

Another thing is you want to make sure you are squishing that bottom layer.  The more the squish, the better it sticks.

 

But seriously, If I were to print the UM robot with petg, you can pick up the whole printer with the tiny robot and spin the printer around.  It won't come off.  The glass will shatter first.

 

 

Share this post


Link to post
Share on other sites

you could also use some strong tape like duct tape over the brim when it is done printing in the places where it is prone to warping. Don't push to hard while taping because the bed will move down a little.

It can help sometimes (not always unfortunately) to prevent the first lifting, as long as the brim stays in contact with the glass, it works. When it starts to lift it can pull it further and cannot be stopped . 

Share this post


Link to post
Share on other sites
On 3/29/2018 at 3:42 AM, peggyb said:

When it starts to lift it can pull it further and cannot be stopped . 

Yes - once air gets under there it's pretty hard to recreate that vacuum seal.

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
      • 125 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!