Re: [CAD_CAM_EDM_DRO] cable drive for X axis

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.

D.

----- Original Message -----
From: "onthemarcxyz" <onthemarcxyz@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, January 18, 2004 12:18 AM
Subject: [CAD_CAM_EDM_DRO] cable drive for X axis


> Hi all my name is Marc,new to this group.
> I am thinking of building a CNC router with a 12' X axis.
> I was first thinking of rack and pinion drive but was concerned
> about backlash. Then I was thinking of using cable prestressed
> between two drums driven by the servo seems this would have no
> backlash?
> what do you think.
>
> Marc
>
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