Re: [CAD_CAM_EDM_DRO] cable drive for X axis

I guess this is a perspective issue. If you're making signage or art,
will 0.010" deviation on the features of a design 10' long matter? What
will be the viewing distance? I.e. the dots or pixels on a billboard
can be 0.5" diameter, but you wouldn't want that on an 8"x10" photo.

Cables would probably be a cheaper route, but what about slippage and
stretch? I suppose you could build a spring loaded tensioner. Perhaps
you could use a timing belt. Another consideration is cable resonation.
I.e. as you're cutting out features, the cable will start slapping up
and down, also affecting your accuracy.

Regards,
JJ

On Sunday, Jan 18, 2004, at 03:18 US/Eastern, onthemarcxyz wrote:

> 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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