No public pics.
It´s a Q of $$, and commercial concerns, and I am sorry.
This may change..
The lathe is not good enough for submicron features (feature =/= accuracy).
Since about 2005, I got about 1 micron mechanical resolution, with ghetto-solution gecko drives, treadmill servos w. US digital E7 encoder 10k counts, and HTD5/15 belts at 1:3.
That was still with acme screws.
Today the stuff is 2-6x better.
I need to do major finishing work, re: wiring MPG and ENC threading, shields wrap-up, before I can do pics.
It really must look industrial, with metal shields, et al.
Major work is required, eg. the saddle plate must be replaced again or milled to accept the toolchangers.
Its about 15 mm too high for the 4-pos toolchanger, at 50 mm thick, 200 mm wide, 400 mm long, by memory.
I can make 1 micron steps on turning.
E.g. the lathe can make (need to) a plug gage with 1 micron steps, etc.
It is not accurate to 1 micron, no.
The steps are 1 micron in size.
Measuring the steps, I can find out eg which one is 50.000 and which are -0.001 and plus 0.001.
Actual accuracy, as-is, today, is about 0.01 mm.
I may, likely will, get better resolution with ground screws,
This is a Q of money, and it´s an ongoing project.
Until other stuff finishes, I cannot justify the ground screws, at this time.
The x axis is 14x more stiff than stock, with 3/4" ballscrew, used to be dual constrained in tension.
The X-screw itself is crap, a roton / mcmaster part I bought back in 2002, when I started.
It needs changing, and causes problems.
It can, and will, make small movements when properly loaded in an incremental direction.
But it has lots of slop, error, etc etc..
Changing to a stock , my import stuff, 25 mm / 5 mm, screw at back, will likely:
+remove most slop.
+remove the spring in current system.
+Allow accurate positioning.
I expect about 2 um-1um-0.5um resolution, and about 3-4 um accuracy over a 50 mm area.
Cost of screw, new, retail, about 120-140€ iirc, and I have some.
About 20-50 hours work.
A ground screw would give 0.1-0.5 um resolution, and 0.5 um accuracy, mapped.
I have one C0 screw, but it only has == 100 mm movement.
Trying to source another.
A custom ground hiwin screw is an option, 20/2 mm, about 800$ ex-works, with 200 mm movement. C3.
I want the longer movement so (gang) tools can work front or back, as needed, since I have a servo spindle.
However, a 5th axis is not out of the question either. A 5th axis normally adds tilt to the 4th axis. Great for making turbine wheels from a solid billet.
I think Mach3 will handle 6 axis.