Re: [CAD_CAM_EDM_DRO] Air assist on Series II knee?

>
> How does the air assist on the knee work? Looking at the pedestal there is
> the air fitting entering the base at the back. at the top of the pedestal
> there is a fitting with the lubricator line and a about 3" diameter
> accordion covering going all the way to the top of the knee ball screw and
> it contains the ball screw. Poking at the accordion covering very gently all
> I can feel underneath is the ball screw. Is there an actual cylinder in this
> thing somewhere? When I replace the airline and apply air will a coaxial
> cylinder magically rise surrounding the ball screw?
>

Hmm, is there any chance the screw itself is the cylinder, or rather
the piston? I'm thinking probably not, as it would require an
unreasonably high air pressure to lift a heavy knee with the cross
section of a typical screw. It would of course leak a bit, but the
leaks would keep chips out of the nut.

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
22 Adrian Street, Somerville, MA 02143
http://www.mdc.net/~stratton
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