Re: Quilt machine CNC conversion suggestions?

The inverted V will shed debris that would hinder free movement.
Inverted V will collect it.
Randy

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Codesuidae <codesuidae@c...>
wrote:

> csgchum wrote:
>
> >--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
> >wrote:
> >
> >
> >>codeSuidae <codesuidae@c...> wrote:
> >>
> >>I have a small quilting machine to which I'm considering adding

2D CNC capability. The precision required is pretty low compaired to
most CNC systems,

> >>
> >>
> >You can also use chain like a rack
> >just place chain between two pieces of flat iron and use dense

foam

> >rubber under chain for spring like action and cushoning of drive.
> >
> Very good idea, I think I might investigate this option first. Its
> attractive because it places the chain in such a way that its

completely

> out of the way. There is perfect location for such a chain on the
> existing track.
>
> I'll investigate this.
>
> Another question about this project. The current XY table consists

of

> aluminum L channel with nylon 'V' rollers for wheels. These have
> acceptably low rolling resistance when running straight in X or Y,

but

> when pushed at 45deg the force required to move the table goes up
> significantly. As far as CNC control this won't be a problem, but

when

> used manually its already annoying (but usable). I'm concerned

that the

> addition of any more reisistance (unpowered servos) will make this
> worse. I'm looking for a better design for the track
>
> My current idea is to use the same L channel, but turn it from its
> current 'L' shape, with the rollers traveling along the top of the
> vertical piece, to an inverted 'V', with two bearings oriented at

90

> degrees running on each side of the track (I'm sure this

configuration

> has a name, but I dunno what it is). I think this would provide

much

> more free motion, as well as giving me some simple but interesting
> shapes to mill :)
>
> Suggestions regarding the mechanics of the XY table?
>
> Thanks
> CS