4th-Axis based on FHA actuator.

Full details of the process here:
bodgesoc.blogspot.co.uk/2017/05/harmonic.html

But here are a couple of pictures.

Interesting project

Cheers
Bengt

Andy, very interesting project. Did you buy the DI mounting cams? A source would be good. I did not have enough room for a lathe with them but it would be nice to retrofit one to my lathe. Plus if I ever try to make a scratchbuild lathe....

rodw wrote: Andy, very interesting project. Did you buy the DI mounting cams?

I did, I managed to find some in the UK:
www.gatemachinery.com/product/cam-d1-4

I think this source was out of stock:
spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/ (Ref R1019)

MSC have them, the price seems to be a set of 3.
www.mscdirect.com/product/details/56451404

Not sure how to locate an antipodean source.

That is nice, looks like it can handle just about anything.