Suggested Velocity and Acceleration Values for a Denford Mill

[Chaz]

I have been very conservative with my Denford mill and my new servos but feel that the machine moves too slow when not cutting.

My motors spin at max 3000 rpm, my leadscrews are 5mm pitch with a gearing of 1.4:1 (roughly).

Any suggested max values for Velocity / Acceleration? What is reasonable?

Thanks