Will a glass bed warp as it is heated?

  • I purchased a glass bed to use with my still-in-transit Ender 3. Since the bed came in before the printer, I pulled it out and used a flat edge ruler to see how flat the glass surface is.



    It appears the glass is slightly "dished" in the center from one side and "raised" in the center on the other side. I am wondering if this is a sign of a defective glass, or if it is likely that the glass may change shape slightly as it is heated?



    If it does change shape, should it be put with the dish side up or down?



    Logic would say that if it does change shape, the bottom would probably get hotter since it is against the heater while the top is slightly cooler, so in theory the bottom may expand more "pulling" the center down?



    I guess the bottom line is, should I send the glass back as defective or wait until the printer arrives and see what happens when I heat it up?


    I wonder about supporting the glass near the center.

  • Himanshu

    Himanshu Correct answer

    3 years ago

    Glass will not change its shape you can watch this interesting video: YouTube - Fix Your Bowed Glass Build Surface - CR-10 3D Printer .



    Or simply change your glass.


    Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.

    If you could add the main points from the video to your answer then that would be great. If the video is deleted, then your answer will not be so useful.

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Content dated before 7/24/2021 11:53 AM