Originally Posted by
cvriv.charles
I was thinking about converting a manual lathe into cnc lathe but im sure that would be very painful seeing that the bit would have to know exactly the chuck is on it's rotation plane to make several passes to cut the treads.
.
Actually CNC takes the pain out, as the control system synchronizes the tool with the spindle, similar to described for helical milling.
I think your problem with a lathe, you need to obtain one with sufficient through hole and that dia generally means a large machine, which you do not necessarily need a great deal of power for that application, so you could end up with overkill on the power end of things.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.