Re: Re: What do we want?

Andrew,

I've seen those belts used to directly run a router setup. It seemed to
work OK. I didn't get to test it tho. This router could exceed 300 ipm
on rapids too.

Clint Bach

Andrew Werby wrote:

>
> From: Andrew Werby <drewid@...>
>
> >Message: 2
> > Date: Tue, 19 Oct 1999 23:50:01 +0100
> > From: "Ian Wright" <Ian@...>
> >Subject: Re: Re: What do we want?
> >
> [Actually, I mis-spoke (or mis-wrote) The drive on my mill's screws isn't a
> steel roller-chain, like on a bicycle- it's a toothed rubber belt which
> engages a corrugated pulley. This would be closer to the "pure curve" you
> mention, but I'm not sure if they are accurate over long distances. It does
> seem fairly positive over the short (6" between centers) distance. Has
> anybody seen or heard of a router driven with one of these- not using it to
> drive a ball-screw, but actually attaching the sliding stage to one (or
> more) of these toothed rubber belts?]
>
> Andrew Werby
>
> >Hi Andrew,
> >
> >In theory, a chain drive should be less accurate than a cable as movement
> >round the sprockets is not continuous. That is, the links of the chain go
> >round the sprocket as a series of straight lines rather than a pure curve.
> >Whether the resulting (small) error is significant in your application would
> >have to be a part of your considerations.
> >
> >Ian
> >--
> >Ian W. Wright
> >Sheffield UK
> >
> >
> >----- Original Message -----
> >From: Andrew Werby <drewid@...>
> >I heard Shopbot, which originally used
> >> a cable drive, has discarded it in their later models in favor of a
> >> roller-chain and sprocket drive system. I was considering this myself, for
> >> the router I'm assembling from scratch. Has anybody tried it on any of
> >> their machines?
> >
>
> Andrew Werby - United Artworks
> Sculpture, Jewelry, and Other Art Stuff
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