Using a chuck rotary I have with my laser, it seams that I have to enter the object’s radius, not the diameter to get the graphic to engrave the correct size.
Example:
Bottle: 70mm Diameter. If I enter that, the graphic is narrowed.
If I enter it as 35mm, the graphic comes out the correct size.
I do have the rotary enabled and the settings set to “Chuck Rotary”