PROBLEM SOLVED It needed scanning offset adjustments.
My engraving/fill designs are not burning completely. Getting ghosting as well. Mirrors are perfectly aligned and cut lines are also perfect, just engraving. The problem is happening with images, basic shapes, text - everything in fact. Pics attached. Any suggestions. I’ve got photos but can’t see how to add them here? Forgot to mention I have a blue and grey 50w CO2 machine and this is a new problem as engraving has been fine in the past.