That is another way to do it too, one thing is that you may want to lessen the depth of it, so that you can go without a chuck on it, you may also want to go a full 90 degrees with it too.
A design like that will take a large amount of travel on the Y axis.
About using a rotary head, do you mean like not having enough room on it? I think thats a possible problem, but its also fixable. I really dont see a big problem with it, although I dont know much about the 3 phase/VFD route.
I am currently using a variable speed ~1.5hp DC motor with a fixed size pully to conroll my spindle.
The other thing I have taken into consideration when seting up a 4/5th axis up like that is what would you do if you wanted to mill a long peice of stock? it would stick very far out of the chuck/fixture.
Jon |