Hello,

I wrote a little GPL software in C# that converts grayscale images to gcode for engraving.

You can get installer and source code from here

http://www.ggsoft.fr/index.php?option=com_phocadownload&view=category&id=8:cnc-image-importer&Itemid=16

http://www.ggsoft.fr/images/stories/imageimporter/ImageImporterSmall.jpg