I am a newbie (in spades)!
What I want to do is etch (not char) a title into book cloth to title a book I am binding. So my question is pretty straightforward.
Is there a way to perform multiple passes over the same path (with fill in) at slightly different levels (we are talking about 0.05 mm difference on each pass) so I can etch into book cloth that has a lighter layer underneath the top layer so I can expose the lighter color and do this without charring (I am getting a handle on power and speed(i.e. charring potential) of the laser. [The concept is about like the photographic exposure triangle: film speed <-> shutter speed ].