I just used the rotary attachment for the first time today and:
I measured the the focus and got a green line as the axis reference of my RA2 attachement
I engraved the stainless steel mug
After it was done, I manually moved the head to verify If I should do a second pass.
After making some adjustments, I started the laser again (for a second pass) but the starting point of the xtool S1 was based on the position of the head tool (red cross) and not one the green line, narurally the image was totally offset
To make it simple, the red cross has to be placed one the axis (green line) when I start the engraving otherwise it's offset.