I'm finding that I will need 3" of mdf sheets to just touch the router bit to the surface at it's full travel. Is this a normal? It is traveling 8" in z (reads 18", but that's another unsolved problem)and hits the stops, requiring reset. So, with there being a 3" of mdf to just get the bit to touch and then a 1" spoilboard, that's 4-4x8 sheets of 1" mdf making up the 4". Is this a normal setup?
Shopbot is a PRSalpha, 48x96.
Thanks for any help.