On a 500mm axis run what would be the optimum diameter for running it with NEMA 23 motor of between 1.4 to 2.5Nm ratings? currently have a 12mm and looking at the following possibilities:

1) Increasing diameter for more rigidity.

2) Going over to a Ball Screw (Currently running Trapezoidal)

3) Doing both 1 and 2 together for improvement in transfer of force and less flex.

Thanks and good to see the board active. Been away awhile dealing with health and work.

Michael