Re: [ATM] Best locations for 4-Pt. Wiffletree edge support PLS.

["Jan van Gastel" <jhm.vangastel@wanadoo.nl>]

There would be very little or no movement in axial direction. But when the
telescope moves further to looking at the horizon, there can be movement
along the circumference. For instance piano wires can be pushed outside and
to not return to their optimum position when moving back, because of
friction between mirror and the contactpoints of the piano wire assemblies.

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/

----- Original Message ----- 
From: "Bob Drew" <gofast3@hotmail.com>

> Jan, if the edge mounts move with the live cell frame, would not there be
> very little movement. The only movement might be because of a different
> coefficient of expansion between the mirror material and the cell
> components,  and any change in orientation because of mechanical flexure
of
> the cell frame.

_______________________________________________
ATM mailing list http://www.atmlist.net/