Re: [CAD_CAM_EDM_DRO] Re: Solid coupler from motor to ball screw?

turbulatordude wrote:

>Check the specs on the motors bearings. I am using only one bearing
>set at the far end, and the bearings of the motor for the near end.
>That eleminates quite a bit of the problem.
>
>

This might work on a Sherline, but is not accepted practice with larger
leadscrews
in larger machines. If the far-end bearing was a paired radial-contact
set, this would
be closer to OK. If it is just a simple bearing on the far end, and
relying on the
motor to control the full axial thrust on the screw, then it will be a
disaster.
Most servo motors have very low specs for axial thrust, in the 10 - 50
Lbs range.
I have my Bridgeport retrofit designed for 1000 Lbs of axial thrust on
the screws,
and of course, it gets much more in a crash.

Jon