[CAD_CAM_EDM_DRO] Re: Re: Moog Hydrapoint

Ray,

> On the ones that I have, this is a large rather deep tub that bolts to the
> knee. It is where the stationary end of the hydraulic actuator sits.

I pulled this off on my machine. Seeing as it's nicely aged & square, I was
thinking it may be a good base for the fourth axis.

> I'm not sure what the wisdom of the group is but my thinking is that you
> will reduce or eliminate the whipping on the long screw for the x axis if
> you spin the nut rather than the screw. If I want about 150 ipm that

means

> that I will have to spin something in there about 750 rpm and I would

think

> that you would get some rather bad whipping when the x slide is near one
> end.

The ballscrews in my machine are 1.25" dia (B-port I standard dia.). My
ballnut travels the total length of the screw (42"). There is slight audible
resonance in one direction when the nut is near the drive, but not much. A
custom made plate mount for the bearings would take that out, I think. A
5/8" dia. would be much different.

- Keith

(@ EMC controlled speed of around 150+ipm. Using just the drive's controller
it gets up to 600ipm. The resonance wasn't much different at that speed, if
I recall correctly. )