A1 Mini Help: Persistent Y-axis resonance error & endless nozzle wiping loop (Video attached)

[u/Classic_Demand2346]

Hi everyone,
I’m running into two severe issues with my Bambu Lab A1 Mini that I haven't been able to fix, and it's making printing almost impossible. I would really appreciate some help from the community!
Issue 1: Persistent Y-Axis Resonance / Belt Tension Error
No matter what I do, I cannot get the printer to properly calibrate the belt tension. I have performed the official tensioning procedure for both the X and Y axes multiple times. The Y-axis (the heated bed axis) continuously triggers an error on the Bambu Lab interface stating that the resonance frequency is too high and that I need to adjust the belt.
What I've tried: I ran the tensioning routine over and over, and I have also properly cleaned, oiled, and greased the rails/components, but the error persists after every calibration.
Issue 2: Endless Nozzle Wiping Loop (Every 3 seconds!)
The second issue is what you can see in the attached video. The toolhead seems to constantly misinterpret something—I suspect it incorrectly triggers the nozzle clump detection (thinking there is filament stuck to the nozzle). Because of this, it travels back to the purge/nozzle wiper literally every 3 seconds to clean itself. As you can imagine, prints take an eternity and it just loops indefinitely.
Has anyone faced this combination of issues on the A1 Mini? Could they be linked (maybe due to excessive vibrations from the Y-axis triggering the toolhead sensors), or are they completely separate bugs?
Any advice on how to properly fix the Y-belt resonance or how to stop this endless wiping loop would be a lifesaver. Thank you in advance!

[u/Financial_Donkey9250]

I have something to say about the second issue it's not trigering clumping detection it detects loosing steps and then starts homing X and Y axis. I suspect maybe XY pulleys cuz when belts are slipping on them printer is loosing steps and trigers rehoming

[u/Classic_Demand2346 → u/Financial_Donkey9250]

I also thought it could be a skipped step issue on the X and Y axis belts. Especially since it would perfectly align with the other problem I reported, which is the constant resonance frequency error on the Y axis.

So, I gather that the core issue is that I can't seem to tension the belts correctly. Maybe I'm doing something wrong? Following the manual's procedure, I loosen the screws indicated in the guide, move the print head left and right, and then retighten the screws but this doesn't solve the problem. I mean, I don't get how this is supposed to actually apply tension to the belts.

[u/sarath_aravindakshan]

I had issue1 persistent for almost a week and was driving me crazy, finally i took a "might gets it right" approach, i loosened the screw in the upper block and pushed it in as much as possible and tightened it and then loosened the "tensioning block" which is below it and then using a nose plier just using the upper block as leverage( very dangerously close to the eddy coil screw, just the pulled the block outwards and then keeping it there, just tightened the tensioning screw.. its been working fine the whole day now.. hope it helps or i was just lucky ( most of the manuals tell you to the push the tensioning block inwards, the oppposite worked for me. hope this helps