I've been wrestling with this compucarve machine since I bought it... the newest failure is as follows:
The piece begins to carve and about 20% in to the pattern (a graphic) the bit depth triples and carving becomes coarse.
There is only one object in the file and one line of software-generated text below (which renders just fine)...
This is the SECOND time this has happened - after the first time, I replaced the original artwork (a JPG) with a PNG and re-imported the art, so it ISN'T the file.
I'll attach the file and a photo of the failure.