Thanks for letting us know about this, @kevquang. Often, when we see an offset this large, it occurs because the head was physically moved or accidentally bumped, which affects the current calibration. I extracted the logs from the print in question to investigate, and it looks like the printer head did not start from the “home” position. At times the head can be moved or bumped while preparing a print, and this can be fixed by rebooting the Glowforge to recalibrate. I’m so sorry for the inconvenience.
If you run into any other trouble, please start a new thread, or email us at email@example.com. Happy printing!