Divot pulled from glass bed

[dacb]

Wow! I use cheap hardware store glass and print ABS onto an ABS slurry and I've never seen this! Can you post a photo? I'm kind of impressed.

[JimG]

Photo of the divot with pencil for scale.
photo1.jpg

This is the object that pulled the divot off of the glass.
photo2.jpg

Another perspective on the divot.
photo3.jpg

I think the primary cause of the pulloff was the glass trying to restrain the shrinkage in the plane of the base of the object. There was probably also some out-of-plane force (tension) being applied at the same time. But the shape of the wedge suggests strongly that the shearing force in the plane of the base of the object caused the pulloff/divot.

Jim