Giant 20' x 3' x 2' router build

[charlieuk]

I dont have any 3d drawings at the moment i tried to get sketchup to load on my mac but it didnt like it.

If you take a look at thins video it shows something similar to what i am building however i just have the flat table and i have decided to have the two beams coming out on the gantry rather than one so as to stiffen it up and split the two rails apart, then the z axis will go inside the square frame you see on the top in my picture.

the z is quite long i wanted to get as much as posable to be able to work on large block of poly styrene and by large i mean i buy it in 16' x 4' x 2' blocks so should i have aprox 500mm of z travel when done.

the plan is to get all axis bolted up and rolling before getting the motors which hopefully wont be too long, im hoping to get the plates for all the carriages this week. I wasn't to sure how thick the motor mount for the z was going to need to be, i was thinking only 10mm as i didnt think there would be to much load on it using a ball screw but happy to take advice on that and as you say ether recess the some of the areas to get the pulleys on or extend the shaft if that is posable?

many thanks Charlie