Re: [ATM] Edge Support was PLOP Calculations

[Andy Saulietis <iss@pvtnetworks.net>]

James Lerch writes,

Re mirror slings:


>Interesting thought, something like a string of pearls.   My thoughts had been
>focusing on the sling support post, and how to give it 4 or 5 degrees of
>frictionless freedom.  Moving some of that freedom down to the sling 
>itself sure
>seems to be a more elegant solution!
Linear bearings are pretty good for this..these have a recirculating
tube of balls and move in a direction parallel to the shaft. Some have
an open gap and can be adjusted for zero clearance..I've built cassegrain
secondary focusing rams that used these bearings. The shafts have to be
ground, hardened, and polished.


Andy Saulietis
ISS Enterprises
10 Milky Way
Mayhill NM 88339


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