hi,
I'm starting to work on A0 size cnc for wood and soft plastics.
i got some 20m of open rail and this basic sketch to start with

let me mention i have built few small cnc/3d printer but nothing at this scale, my idea is to start and learn on the way while learning from others

i have few questions.
1. motors - how beefy do they need to be will NEMA 34 640 oz-in do? or they too much/too little?
2. motion - i was thinking of acme rods dual driver for the y axis and single for x, what type is good for this size to get fast enough speeds? also - good source?
3. drill - any good source for the drill head? - international shipping is a must.

that will help me get started but if you have some critical decisions you think of from your experience i didn't mention please do.


thanks !
-atntias