Hi Yusuf,
CHL's answer above is correct for e.max press (mill wax patterns, invest, burn out and press). The DWX-50 will not mill e.max CAD since that needs to be wet ground. The
new DWX-4W wet mill will be used for wet grind materials.
The DWX-50 will work with 98-100mm diameter Zirconia discs. 3D BioCAD is a Roland reseller in the US and their Zirconia discs work in the DWX-50. The DWX-50 also has an optional adaptor to hold up to 6 pin (mandrel) mounted materials like Vita Enamic and 3M Lava Ultimate.
http://www.rolanddgastore.com/product.aspx?zpid=6634 I am sorry we did not have a chance to meet at IDS. It was a great show but with so much to see it is difficult to do it all!
If you need anything else just let me know.
-Glenn