Walter thanks for showing some interest.Also check
www.moglice.com.Interesting stuff.
Why epoxy granite?It takes 4 to 6 months to develop a machine tool of traditional cast iron.After casting,it has to age for 4 months to releive stress before being surfaced and then get heat stress relief.Cast epoxy/granite can be ready in one week with coolant lines and other inserts or ways moulded in.As I stated before Epoxy/granite is super $$$$,But a machine tool manfacturer can save tons of money from the time saving and have better properties than cast iron.As stated in geoligy reports granite was stress releived billions of years ago.
Also companys are filling weldments or machines made of steel tube to eleminate resonance.Since epoxy has 0 VOC or solvents,when filled it has ZERO shrinkage.If you poured raw epoxy on the floor it will self level to .005 or better.What a way to get an accurate table surface to measure and build your machine on.
I am in the composites business,Know little of CNC stuff,but have knowledge of fillers and micro packing.
BTW in my business polymer concrete is out of date Polyester resin mixed with rocks for garbage cans and parking lot thingies.
Never Never get the idea I'LL use polyester or fiberglass resin as a bonding agent.It just shrinks too much and is extremely brittle.
Walter thanks for expressing interest,all the research time seems worth it.
I am not discounting the hobbyist use of the materials as they cost so much,but will not recommend usage until I am sure of performance.
Wow thought this would be short as I am swamped with orders righ now And
don't have much time.I am guilty of going on and on.I have tons more info on the subject if you want to hear more.Let me know if your intrest is still there and I will try to post something {short}daily.Questions are welcomed,Hope I can answer.
Larry