I am planning to build a 5-axis CNC machine. I already have a 3-axis CNC mill and just need to build the 4 & 5th axis. The main requirement I have is that it be backlash free which general means it should be a direct drive system rather than use worm gears or belts. Please correct me here if I am wrong. Although there are backlash free worm gears, eventually they do require re-adjusting which is a disadvantage.
My main design concept is to take a manual horizontal/vertical rotary table which uses a worm gear and convert it to a direct drive rotary table. I have one main question for anybody out there. How can I do this direct drive conversion? Any kits, plans, blog sites, and etc? If I have to do it on my own, does anyone have suggestions or comments before I begin on this project?
Thanks,