CAD CAM EDM DRO was a Yahoo group founded May 3rd, 1999 by Bill Logan to discuss CNC related topics. The group existed for 20 years until Yahoo shutdown it's groups service. By the end there were 11,242 members and more than 100k messages where posed. Below you will find a Web archive of the discussion.
Group Description
This list is for the discussion of CNC and related topics ranging from building your own all the way through the basics of how to make a part. The list focuses on the construction of home shop CNC machines along with the technologies a CNC hobbyist will need in a Home Shop environment. This list does NOT focus on general machining, but does cover topics like using fixture offsets, tool offsets, and how do I get my part to come out within tolerance as well as general CNC approach to a part. This is not a forum for the discussion of commercial shop issues, but commercial users are welcome and encouraged to participate in the discussion of hobby related issues and the various shop techniques that would help any machinst to be more successful with a CNC machine. This group is aimed at the home workshop and small scale CNC user.