Mmm, as ever there is no right answer I guess! What I'm hearing is that AM882's will undoubtedly do the job on both mills, but is it worth the outlay. On the ballscrew mill, they probably wouldn't be used to their potential, and for the trapezoidal mill they may just be overkill for a "cheap" implementation - albeit their abilities may be useful.

So, what would be the next step down, voltage and drive wise? Given that as a data point will allow me to price it up and decide if the saving is worth it?