Below are a number of images showing my lathe CNC conversion. It is still "In-progress" and will be for a while. I'm still having a battle over what to do with the X-axis.
Initially I thought about just using a Sherline leadscrew and stepper mount to drive the Z axis. If I use the Sherline stepper mount and leadscrew it will be a pain to use the lathe in manual mode. I'm currently thinking of using a couple of timing pulleys and mounting the stepper to the left of the carriage. That way, by removing the timing belt I can use the lathe manually.
The spindle motor is a 180V 400W DC motor that is used in an Asian 12x7 lathe. It's mount is fabricated out of aluminium. The tension adjustment is similar to that used on the mill.
The stepper motor is a Pacific Scientific Powermax II, rated at 3.3A, 62W. About 214 oz/in.
Rear view of the lathe and motors.
The enclosure is made from a old 19" rack bought of ebay for around five bucks. The height is about 1/4" higher than the top of the headstock.
Another view showing the back plate, and general setup.
Enclosure from the top. I'm not sure that the knob at the rear of the stepper is going to get much use.
Another view from the top.
With the lid on. The X-Axis lead screw and mount is a Sherline Mill spare part. Also shown is the KB DC motor controller and Emergency Stop switch.
Still a way to go....