A guy on the Vectric forum has made available a free program to convert one of your axis moves into rotary moves in G-Code.
I would like to build a stand alone cnc rotary table. Anyone that has done this I would like to hear from. Program controll etc
There's an open source rotary indexer here that might suit your needs:
http://www.cnczone.com/forums/showthread.php?t=47007 (Rotary table indexer)
Thanks for your help and information, it was most helpful. Sorry for the delay in responce