Yes the Z axis does not need to be as big, and the motor you currently have would most likely be ok, as you have it allready use it to see if you can get what you need, if not, then upgrade it.
does the Z need to be as quick? if not you could most likely get away with a 1605 ball screw.

Quote Originally Posted by AdCNC View Post
ok, so if i get my self 3x PM2278 Drivers 2x 1810 oz-in NEMA 34 steppers for the X axis and 1x for the Y and use the NEMA23 for say the Z for the time being i should be able so work at a half decent pace and it will get the 6x4 table in motion? ive got no chance of going for servos at this stage!