Re: [CAD_CAM_EDM_DRO] differential threads for extreme precision movement

In a message dated 08/10/2000 7:50:48 PM Hawaiian Standard Time,
pentam@... writes:

<< With such ratio's as these, there should be no requirement to use
pulleys to increase leverage, so the motor can direct drive the shaft.

There are of course some interesting "details", which I leave up to
the "sufficiently curious".

>>

Doug,

I believe one of the details is the fact that the motor would either need
a separate slide to move on or the screw assembly and the motor would need a
telescopic drive between them. This since the two nuts are anchored to the
base and table, the screw must "float".

A do-able but humbug setup.

Peter
THRD, Inc.