Viperia
Epoxy Granite is used for metalworking machines commercially by Mazak, Hardinge, Epucret, etc. The group of us on this thread is working on making a practical formula that is easy to use for home CNC machines. Walter on this thread has built part of a machine using some of the work here.
I and others haven't built machines as we are concerned with first precisely understanding the parameters of the material and the best way to use it. The flexural strengths and moduli are not known right now and as a result we cannot say with any certainty the thickness of the sections required to hold a given deflection in a part.
Walter's formula is posted here
http://www.cnczone.com/forums/showpo...postcount=1753
The formula that I currently recommend is:
1 part #6 Agsco Brown Aluminum Oxide
1 part #4 Agsco Quartz
1 part #2 Agsco Quartz
1 part #2/0 Agsco Quartz
1 part 3M G800 Zeeospheres
1 parts 3M G200 Zeeospheres
(Agsco is a U.S. distributor of aggregate.) 3M is the 3M company.
According to a computer model, we believe that this formula is only about 12% empty space which is then left for the epoxy. Exactly how much epoxy is the right amount is unknown at this point.
Regards all,
Cameron