Quote Originally Posted by Jonathan View Post
I'm happy to comment on the new design, but I haven't posted as most of the things I have to say are the same as what I said in post #7. The main problem is still that the gantry is far too tall - it's best to have no gantry sides and lower the bed, that way the gantry is supported by the main frame not some flimsy bits of plate.

A 3Nm nema 24 motor is plenty for the Z-axis. Also, to get anything like good resolution on X and Y with rack and pinion, you'll need to have two belt reduction not one. Search on the forum for rack and pinion versus ballscrews and you'll find plenty of relevant information.
thanks for the advice