Thanks Guys, but I can’t help thinking that Art deserves the credit here.
Although, over the years, I have made a few minor changes to the code (basically to suit the operation of my own machine) the Impact / Laser Engraving plugin was written by Art in 2007 – long before we even had a laser to test it with. He certainly has foresight and his software never ceases to amaze me.
My current worries are that I will become a Dinosaur - because this plugin works so well, I will never be able to leave Mach3 for Version 4.
There was some discussion (in another thread) where I doubted that laser produced lithophanes could actually produce a resolution equal to spindle engraved versions but since getting hold of some genuine Corian to try - I now think that it is possible to get extremely close.
The big advantage is that the laser takes half an hour to produce a small, 0.1mm step-over, litho that may take half a day with spindle engraving.
Tweakie.