I have seen this happen to a lot of my personal projects lately. I figured it was some sort of alignment or ghosting issue with my vectors but tonight I attempted to do the ruler from the predone options with some proofgrade material. I’ve seen this on other materials, proofgrade or not.
I think it might be something with the lens, but I’m unsure if that’s the case.
That almost appears to be a problem with the “Y” belt, like it’s missing a tooth or dragging on something. Looks like the Gantry skipped on one of the passes and does so routinely…?
Then, print the Gift of Good Measure on the piece of Proofgrade Draftboard we included in your starter materials for troubleshooting. Let us know how it goes, and include a photo of the test print.
It’s been a little while since I’ve seen any replies on this thread so I’m going to close it. If you still need help with this please either start a new thread or email support@glowforge.com.