RE: [CAD_CAM_EDM_DRO] Re: Rolled vs. Ground ballscrews or other screws!

You know, in the case of backdriving ballscrew runaways
when climb milling...

A velocity dependent damper could prevent that and still allow
easy low speed motion.

A partially shorted dc motor coupled to the screw would do that...

Les

Leslie M.Watts
L M Watts Furniture
Tiger Georgia
(706) 212-0242

Main page:
http://www.lmwatts.com
Engineering:
http://www.lmwatts.com/shop.html
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http://www.lmwatts.com/forsale.html
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-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com]On Behalf Of Lance Hopper
Sent: Tuesday, September 20, 2005 8:16 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Rolled vs. Ground ballscrews or other
screws!


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@y...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Lance Hopper"
> <snaggletto@c...> wrote:
> > I've run a Bridgeport with ballscrews for a couple years. It was

a

> > beautiful experience in all situations. Climb milling is

possible

> > with smaller cutters and lighter cuts, but any backlash or slop

will

> > be violently taken up if the cutter digs in. Save climb milling

with

> > 2" face mills and heavier cuts for the machining centers. I

don't

> > doubt that anything is impossible, but to throw the table off of

the

> > machine means that the operator is a dumba** and has no sense
> > or 'feel' for how to machine.
> >
>