Z-axis Head Crashing on a new A1 , messed up the heating bed slings plastic , trying to figure out the issue
Hey everyone,
I just got a brand new Bambu Lab A1 with AMS Lite. For the first 3 days, it worked flawlessly, but then it started giving me continuous SD card errors mid-print. Whenever I hit "continue," the extruder would just go back to its last position and freeze there. This happened around the exact same layer height on three different prints, forcing me to pause and look for solutions.
After reading some forum posts suggesting the latest firmware update might be causing SD card glitches, I decided to downgrade the firmware to the previous version.
The first print after the downgrade seemed fine until it reached the very last layers. The infill/lines didn't complete; the toolhead suddenly stopped, moved back and forth erratically, and then moved all the way to the back of the Y-axis. It literally slammed the hotend straight into the plastic assembly behind the heatbed (the purge/wiper area) and dug right into it.
The plastic started melting and smoking, so I panic-shut down the machine. After turning it back on, there were absolutely no error codes on the screen.
The hotend or the assembly might be bent, and the back plastic is physically damaged. Since this machine is only a few days old, I'm seriously considering returning it.
Has anyone experienced a firmware downgrade causing a catastrophic head crash like this? Do you think it’s a faulty mainboard/sensor, or should I just pack it up and open a return ticket with Bambu Lab immediately?
Thanks in advance.