I saw a picture of a Glowforge in front of a window, on a Facebook post today. Because mine too, sits in front of a window, I thought I would share a little hypothesis I have regarding alignment.
First off, I must state that my alignment has been remarkably, perfectly accurate - except for a couple of times. Literally only two times has it not been perfect.
So, here’s my hypothesis and my solution:
As with any camera, lighting is key, and I think it’s no different with the Glowforge cameras. Because lighting from external sources, such as sunlight throuh the window, or directional lighting within the room, can affect a camera’s image, it’s important to make sure such situations don’t exist.
The two times I had alignment issues, I simply turned my Glowforge off, covered the glass lid with a piece of cardboard, and then turned the machine back on, and allowed it to calibrate - Problem solved both times.
It worked for me, and it very well might work for you. Happy Glowforging.