3D Printing

4373 readers

1 users here now

For everyhting 3D printing related.

Please be excellent to each other :)

Icon by Freepik, Banner photo by Thiago Medeiros Araujo

founded 4 years ago

MODERATORS

[email protected]

First glass bed failure with PETG (programming.dev)

submitted 1 year ago by [email protected] to c/[email protected]

13 comments fedilink hide all child comments

I have been printing with PETG on glass for a little while now, and have gone through almost an entire roll. Yesterday I had my first print stick so hard that it delaminated the glass :(. I stopped using hairspray as it made the prints not stick at all, and printing bare glass was just fine. But something about yesterdays print made the glass give up. Is this how PETG + Glass normally fails? Works perfectly for years, and then suddenly fails?

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 1 year ago (1 children)

I don't tend to print on glass, but this failure mode isn't surprising - repeated heating and cooling, plus the mechanical stress of the PETG slightly contracting as it cools will create microscopic cracks the build over time until the sheet fails

[–] [email protected] 1 points 1 year ago

Yup, in hindsight that seems obvious. But i never had super strong adhesion to begin with, so I assumed it was fine. And my impression was that petg glass failures were something that happened instantly, rather than a gradual thing.