Here are the parts needed to control a lathe with your Shopbot Alpha as an indexer like this:

http://www.talkshopbot.com/forum/sho...o-for-under-1K

This set includes:
- Vexta ASM98AA motor (the same one that powers the axis in your Shopbot Alpha)
- Vexta mounting bracket for the motor
- Belt drive pully (toothed) for motor shaft
- Drive Belt (toothed)
- Drive shaft for lathe with M2 Taper on one end.
- Belt Drive pully (toothed) for lathe shaft 6"
- ASD30A-A Driver for ASM98AA motor (programmed by Shopbot, and the same as in your control box) with control box cable for connecting to control board.
- 80 ft. cable from control box to ASM98AA motor, purchased from Shopbot.

Pictures: https://goo.gl/photos/TDr2vjDfc851Cyfb6

All yours for $575. plus shipping. Paypal "friends and family" (Free) or "Goods and Services" (add 3%) or credit card through Paypal (add 4%).