Re: Why not use threaded rod leadscrews?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@y...> wrote:

> as for efficencies, I have seen all-thread in the 30% range
> ACME in the 60% and ballscrews in the 90%. If you need to spend

$$$

> for a motor (and driver) that is 3 times larger to compensate for
> cheap thread..... your call.

Thats a good point Dave. BTW How do I calculate the required motor
torque for the X-axis that has to move the entire gantry?