I think it is pretty standard for scroll chucks to not repeat better
than 0.001". My experience is that chucks are often considered good in
the 0.001" to 0.005" run out repeatability. I suspect when the chuck is
tightened, there is enough friction between the jaws and the chuck body
that preve
On 5 June 2015 at 13:09, Erik Christiansen wrote:
> Isn't the scroll on a close-fitting spigot, annular to the centre hole?
> If that's so sloppy that it can rattle, then it would be pushed to
> eccentricity by the lathe tool. Time for a new chuck, then.
It needs enough clearance to rotate, and t
grinders
Reply-To: emc-users@lists.sourceforge.net
In-Reply-To:
On 04.06.15 10:50, andy pugh wrote:
> I know how the _operate_. I don't understand how they _work_
> It seems that the clamped-together assembly of scroll, jaws and work
> ought to be free to rattle around as a unit inside the main
