Re: [CAD_CAM_EDM_DRO] Re: How hard to rotate should preloaded ballnuts be, anyway?

On 4/18/07, Polaraligned <polaraligned@...> wrote:
>
> The ballnuts should turn freely without any gritty feel.
> If you can, submerse the whole ballscrew/ballnut assembly in
> a solvent and run the ball nut back and forth to flush
> any foriegn particles out. It could be hardened grease
> combined with metal particles causing the problem.
> This method is recomended by Bridgeport in their BOSS CNC
> manual to flush the ballscrews.
>
> Scott
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>,
> Abby Katt
> <cncgroupnospam2@...> wrote:
> >
> > Howdy Folks,
> >
> > I'm recomissioning a neolithic ORAC CNC lathe with modern CNC-controls
> > (Mach3/new electronics etc) but in cleaning it up have run into a
> > mechanical conundrum. The ballscrew along the long-axis is really stiff
> > and gritty to turn, I've been cleaning it up with WD40, but so far
> to no
> > avail. I'm beginning to come to one of those deadly-fatal conclusions
> > where I give up and let all the little balls out...
> >
> > My question is - how hard is to to rotate by hand preloaded ballscrews?
> > (I assume this thing is preloaded, it has a massive ballnut) It has
> some
> > screws on the tubes through which the balls recirculate. Is it easy to
> > open this and remove/clear/reinstall the balls, or is this just
> > spherical-based-madness?
> >
> > The mounting block is also under tension, and also quite hard to turn..
> > how tight should this really be?
> >
> > Oh, I have some pics of it here too:
> > http://www.silverkatt.co.uk/Lathe/Default.aspx?Page=2
> >
> > BTW> This machine has been in storage for 10+ years...
> >
> > Regards,
> > Abby
> >
>
>
>


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