A1 Freezes During Calibration/Homing - No Error messages

Bambu Lab A1 Series Troubleshooting
1

Hello,

My A1 is stopping suddenly after I start calibration or homing. No error message appears after this happens.

I just replaced the hot end assembly after a clump (because I cut the wires on the old assembly during removal).

The screen shows the hot end at +200 degrees but it is cold to the touch. Here is a link to a video of the issue:

I have submitted a ticket thought I would post for any advice/experience others have to offer.

Thanks

2

Check your wiring.

3

If the nozzle is cold even when displaying 200c, then it’s a problem in the thermistor. As said, check all wiring again and see what is wrong.

4

Thanks for the suggestions. I have double checked the wiring, and tried two brand new hotend wiring assemblies. Still displaying high temp on the screen but nozzle is cold to the touch. Printer still stopping suddenly during the homing/calibration process with no error message being displayed.

IMG_1580
IMG_15802268Ă—4032 2.04 MB

5

Issue resolved, it turned out to be the Tool Head Board. New part was sent by Bambu and the printer is working now.

1 Like
6

Just to share some extra details, I’ve faced the same issue recently. When initializing the machine, the screen remained stuck on “resetting axes,” and the problem turned out to be a defective SD card.