Layer shifting Y axis during long print

Hello comunity,

I have a Bambu A1, and I tried a large model printing for the first time.
During this print an issue occurred during the final part, I am ssuming that it is a Y axis shifting.
The maintainance on X and Y axis was done a couple of weeks ago, with cleaning of the rails and oiling them.

During the printing i noticed that my A1 started to do a lot (i mean 10-20 times) of home reset during the print of the upper part of my vase model, so i think it started losing y steps.

This is a front view of the printed model:


As you can see, at certain layer (around 550-600 on 700 layer total) printer has started to create the issue.

This is a lateral view of printed model, as you can see the middle section is ok. That’s why I am assuming that there is shifting in Y axis direction:

I don’t know if I made something wrong, and to possible solve the issue.
Any hint or suggestion is welcome.

Printer Model: A1 (stock)
Slicer: Bambu studio
Nozzle: 0.2
Layer height: 0.24
Filamnet: Generic PLA

Modified settings from standard Bambu PLA profile:
Avoid crossin walls: enabled
Minimun filling threshold 3 mm2
Support: enabled
Top surface mode: concentric
Infill: lighting

Thank you in advance to all who will have the patience to support me.

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Hello comunity, please a little help in order to let me know if i can do something to fix the issue.
thank you

I’ve recently had this same phenomenon myself. I was printing a downloaded model directly from MakersWorld, and no one else seemed to be having that issue with it. So I assume it’s something in my machine, and not the code.

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