CAD CAM EDM DRO - Yahoo Group Archive

Gears vs. belts (and NOT about M/D's ) was Re: tensioned ballscrew

Posted by ballendo
on 2002-02-19 05:20:34 UTC
John,

You've got it right when you say "fearsomely expensive in the
accuracy and POWER transmitting ability needed". Belts are much more
suitable for machining type cnc...

You DO see the planetary drives where loads are lighter and/or cost
is no object. Shopbot even uses them now on their newest machines.

Hope this helps.

Ballendo



--- In CAD_CAM_EDM_DRO@y..., "John H." <johnhe-uk@s...> wrote:
> Ballendo (And all),
>
> Why are planetary gears not used more in place of belts? Are
they
> fearsomely inaccurate or expensive for the level of accuracy
needed? They
> just seem like a 'clip it on' option in place of machining pulley
supports
> etc. Are they only used when you need very high gear ratios?
>
> John H.
>
> > Doug,
> >
> > Sounds like a lot of work, especially when there's a simple,
proven,
> > often-used solution.
> >
> > Spin the nut.
> >
> > You can still "adjustably" tension the screw if you want...
> >
> > Hope this helps.
> >
> > Ballendo
> >
> > P.S. K.I.S.S.

Discussion Thread

Doug Harrison 2002-02-18 18:45:25 UTC tensioned ballscrew JanRwl@A... 2002-02-18 20:06:13 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew vrsculptor 2002-02-18 20:20:57 UTC Re: tensioned ballscrew JanRwl@A... 2002-02-18 20:23:44 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew Bill Vance 2002-02-18 21:13:37 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew ballendo 2002-02-19 04:16:18 UTC Re: tensioned ballscrew John H. 2002-02-19 04:26:26 UTC Re: [CAD_CAM_EDM_DRO] Re: tensioned ballscrew ballendo 2002-02-19 05:20:34 UTC Gears vs. belts (and NOT about M/D's ) was Re: tensioned ballscrew Les Watts 2002-02-19 08:20:59 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew JanRwl@A... 2002-02-19 13:46:15 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew Doug Harrison 2002-02-19 16:40:17 UTC Re: [CAD_CAM_EDM_DRO] Re: tensioned ballscrew Doug Harrison 2002-02-19 16:41:55 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew Doug Harrison 2002-02-19 17:13:49 UTC Re: [CAD_CAM_EDM_DRO] tensioned ballscrew Chris L 2002-02-19 19:52:53 UTC Re: [CAD_CAM_EDM_DRO] Re: tensioned ballscrew ballendo 2002-02-20 04:28:28 UTC Re: tensioned ballscrew redux ballendo 2002-02-20 07:27:48 UTC Re: tensioned ballscrew ballendo 2002-02-20 08:18:57 UTC A/B (anti-backlash) rack/pinion drive was Re: tensioned ballscrew Kevin P. Martin 2002-02-20 08:23:09 UTC RE: [CAD_CAM_EDM_DRO] Re: tensioned ballscrew Shelbyville Design & Signworks 2002-02-20 08:24:11 UTC Re: tensioned ballscrew Doug Harrison 2002-02-20 12:54:53 UTC Re: [CAD_CAM_EDM_DRO] Re: tensioned ballscrew ballendo 2002-02-20 15:10:07 UTC These prices are nuts ! was Re: tensioned ballscrew Doug Harrison 2002-02-20 17:39:39 UTC Re: [CAD_CAM_EDM_DRO] These prices are nuts ! was Re: tensioned ballscrew Doug Harrison 2002-02-20 18:06:22 UTC Re: [CAD_CAM_EDM_DRO] A/B (anti-backlash) rack/pinion drive was Re: tensioned ballscrew