Re: [CAD_CAM_EDM_DRO] cable drive for X axis

On Sun, 18 Jan 2004 05:59:15 -0800, you wrote:

>I was junking out a 5" floppy drive for parts a while back and discovered
>that the stepper that moved the heads track to track translated the circular
>motion of the motor to linear motion by way of a flat steel spring wound
>around a spool fastened to the shaft of the motor. The problem with that
>translation is resolution vs travel. You need some way to gear down the
>stepper and that will introduce backlash and repeatability problems. I did
>like the idea of "steel" belts though.

The problem with that is the drum diameter vs. the number of turns
needed on the drum for the belt. That scheme has been used to drive
x-y plotters for quite a while.

Harvey

>
>D.