Sure, the 20mm 5 mm pitch ballscrew and the DRV8825 drivers set to 32 steps (
https://www.pololu.com/category/154/drv ... gh-current) should give you what ever Z you want.
The calculation is from herehttp://forums.reprap.org/read.php?1,2596561.8 degree motor divided by 360 = 200 steps per revolution. 200*32 (micro stepping) = 6400 micro steps per revolution. 6400/ball screw pitch of 5 = 1280 steps per MM.
The code can slice down to what ever you want, it will just take more memory. At the moment it slices on demand. So you can "quickly" go from the 3D world to the review manager and then calibration and print.
My old (probably +5 years) i3 laptop with 8GB memory doesn't have enough memory to put 6 skulls on the build plate, because the STL files are 20MB each. 8GB memory will currently allow you around 40MB or 50MB STL file if I remember correctly. I haven't spent much time on seeing what I can do about the memory. Been focussed on getting the app to work and the printer to print.
When I place my orders next it will take 2 months for the parts to get to me. So in that time I can spend time on the things I want to finish. I want to finish the Toyota engine, print an RC car, print a quad copter. When I get the beta parts I will have the wide vat that will allow me a print area of 400mm x 200mm so then I can print things like the Iron man helmet and some other cool big stuff. Maybe even that full Batman suit.
My beta tester in Sydney will focus on printing small detailed things. He makes really professional videos and takes great photos. We will probably not see any photos or videos of the engineering company in NZ. They have a rapid prototyping shop with a bunch of FDM machines and they are looking at adding SLA or DLP machines so I am sending a machine to them with everything in it. Then 2 machines with some of the addons will go to guys in the USA. I have 2 guys so far that I believe are important and I will hopefully get more testers pop up as time goes by. Really want Tested.com to have a look at the printer and also Adafruit. Tested.com ignored my first mail, but maybe they will listen to me now.
I use a Sanguinololu board running a modified Marlin. The modification is for the wiper and for the leveling electronics and ofcourse the ballscrew. All software and code will be available on the site when I launch. The hardware probably not. I already had a couple e-mails from Chinese and Indian companies looking at buying my printer to get into the beta. I wonder why .....
At the moment I am focussing on getting a high detail ring printed using the continues method. When I get that working I will post a video and we will take some photos for you. Actually tried it at 1 micron to see how it looked and I couldn't see a difference with a magnifying glass between the 1 micron and 10 micron and even 30 micron. We will see how it looks with the camera of my wife. I don't have a microscope to see the difference between the layers.