Jump to content
Ultimaker Community of 3D Printing Experts

Glass Build Plate issues


Recommended Posts

Posted · Glass Build Plate issues

Just removed a large CPE part from the printer and left it for 30 minutes during which time there was a lot of creaking. The part came off with almost no help at all along with the surface of the glass as you can see in the pic. No glue was used on the build plate. Anyone else had this?


  • Link to post
    Share on other sites

    Posted · Glass Build Plate issues

    This is fairly common with polyesters (PET, CPE,...). Some people advise to use glue, in the hope that the glue layer will break instead of the glass. But for me that didn't help, my glue was too good. So, just like you, I also heard the glass cracking while it was still cooling down.


    Now I use my "salt method": wipe the glass with a tissue moistened with salt water prior to printing, which leaves a thin almost invisible layer of salt stuck to the glass. For PLA the salt method greatly increases bonding (compared to printing on bare glass) when the glass is hot, but there is no bonding at all when cold. But for PET the salt method slightly reduces bonding, so the glass doesn't crack anymore. Now the model separates from the glass in the salt layer, as desired. Disadvantage is a bit more risk of warping, so I print with no cooling fans. I only use glue now if I need a lot of cooling fan for printing overhangs.


  • 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 showcase | April 2022 | 4pm CEST | 10am EDT
        I'm excited because I've personally produced this showcase event, so if you are curious what else I'm up to nowadays, come check it out and say hi in the chat! It would mean a lot! 
          • Thanks
          • Like
        • 4 replies
      • New here? Get ahead with a free onboarding course
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 12 replies
    • Create New...