Re: [ATM] wire spider ready!

["Don Clement" <clement.focuser@verizon.net>]

My thinking is that a single mechanism for focusing and alignment can lead
to problems unless the two functions are absolutely independent of each
other. A case in point is the focusing and collimation of a  new commercial
cassigrain design where both functions are combined using three independent
stepper motors. The problem is that focusing and alignment aren't
independent. Focusing affects alignment. I have avoided this potential
problem by making the two function separate independent mechanisms.



Don Clement

Running Springs, California



> > In my arraignment focusing and optical alignment (collimation) are
> > separate
> > and independent mechanisms. Focusing does not affect alignment and
> > alignment
>
>
> What I mean is that focusing and optical alignment can use the same
> adjustment points (screws, bolts, what have you) but operate them in
> independent manners, ie, focusing is all bolts moving at once, optical
> alignment is one bolt at a time.
>

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