Originally Posted by
joeavaerage
Hi,
that makes it worse not better. The bigger the table then to achieve a given level of rigidity the cross sections of materials
you have to use go up exponentially and weight likewise. With increased weight comes increased horsepower from your servos
and on it goes.
If your table had 1200 mm travel in X then you could use a longish rolled ballscrew, maybe $200 or so. At 3m you'll have to use
rack and pinion, with backlash adjustments $500 or more.
When it comes to CNC big means very VERY expensive.
I would guess that you could build two 1200 X 2400 tables for less than you could build one 3m X 3m.
Craig