Glowforge recently replaced my original unit, and for the most part the new one is working fine. (It definitely doesn’t have the same problem that my first one did.)
However, the new unit is exhibiting an odd behavior on startup. Almost every time, when first powered on and beginning calibration, it makes a loud rumbling sound as the head attempts to move, and the Y-axis belt slips. It repeats this behavior every few seconds until I power it off.
If I manually position the head under the camera before turning it on, then it calibrates normally. But the next time I power it on without manually centering it, it again fails to calibrate and makes the loud belt-slipping noise.
My first unit didn’t do this, but I know that others have encountered the issue:
How do I resolve this issue permanently, so that I don’t have to manually position it every time?