Rotary Y Axis no longer works (rotary chuck)

Hi there,
I hope this is the right forum to ask for assistance. I have had a ComMarker B4 Fibre Laser for some months. Burning onto bottles sing a Chuck rotary on the Y Axis (sitting at elft of machine). All has been well with the Y axis locked into the chuck rotation. Now for no obvious reason, the Y axis has divorced itself from the rotary chuck and is now burning way off to the side of the bottle. However the framing appears to be on the bottle. All rotary settings appear as per normal. Appreciate any feedback on how anyone may have fixed this.
Thank you,
Brendan

Did you accidentally change the coordinate system selection in Lightburn?

Also check output center. Should be roughly half of the field size depending on how close the rotary is centered.

Thank you. I gave it another 4hrs of scrutiny and no joy. I have emailed support photos to see what it could be. Appreciate your help though.

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