From: "Tom Krajci" 
To: "'Don Clement'" ,
        ,
         
Reply-To: "Tom Krajci" 


>From: Don Clement [mailto:clement.focuser{at}verizon.net]

>Instead of a super rigid truss, have you considered of a truss that
>deflects
>but still remains collimated, such as a Serrurier truss?

That may be a possibility.  Now that I have software that makes truss
analysis easy (once I convince myself that it's accurate and that I'm using
it correctly)...I may make a Serrurier truss.  Also, I'm leaning toward
connecting the OTA to the fork arms by putting a box frame at the balance
point of the OTA...which sets me up nicely for a Serrurier truss
arrangement.

Also, if I stick with the square truss...there is room in the four
'corners' of the truss (not in the way of the mirror) where I could
place compliant hinges (essentially like the ones in your focuser) to allow
main mirror focusing.  Hmmm...four compliant hinges...gotta make sure I
align the axes and degrees of freedom properly so the four hinges don't
fight and bind each other through the range of focus travel.  Will that be
difficult?

Tom Krajci
Tashkent, Uzbekistan


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