re: torsion in long leadscrews wasRe: Servo torque test question

Les W wrote:

>The seal friction terminates the screw in its characteristic
>impedance to prevent large torsional resonances in long screws.

Les, List,

Another approach used with long screws is "fix the screw in position,
and spin the nuts...

Ballendo

P.S. You can also use smaller diameter screws in many cases.