Re: Rolled vs. Ground ballscrews or other screws!

--- 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.
>

I figure it this way, he has been a repairman for over 20 years in the
phila area for Bridgeport, so has seen more machines and been in more
shops than most tool salesmen.

2 over that time is not too bad as I have personally met more than 2
dumba**'s in shops running machines myself.

But as we know a ball screw nut will run it self the length of the
screw if the screw is standing vertical. an ACME won't do that. the
ball screw also does not have the same TPI so it offers MUCH less
resistance when smacked.

Dave