Re: [CAD_CAM_EDM_DRO] Torsion Test Results

Mariss Freimanis wrote:

> Hi,
>
> Ok, as promised, here's the results of my tests.
>
> The short answer is there is no significant difference which end of
> the leadscrew the encoder is on.

> The leadscrew simply did not twist enough to make any difference.
> Pulsed torque 275 oz-in, 3/8" leadscrew, 30" travel.

Fascinating! I'm amazed that you didn't see much twist under
this setup. Now, one question - did you have a load on that
leadscrew? (The significant difference between this test and the
earlier one you reported was the big, heavy wrench on the end
of the bar, which dramatically enhances the effect. The tiny rotational
inertia of the encoder doesn't compare.)

Jon