Re: ATM A cage as secondary holder

[Mel Bartels <mbartels@efn.org>]

...that's right, if the OTA rotates around the OA, such that as the scope moves
from horizon to zenith, it will rotate 90 degrees around...  so it starts by
needing a horizon correction and ends with needing an elevation correction...
definitely something that's better fixed mechanically than in software, don't
you think?

iss@pvtnetworks.net wrote:

> Mel writes:
>
> >I see no way around it: we must be able to move
> >one side of the altitude bearing up and down, and forward and
> >backwards.
>
> Moving the bearings fwd/backward would have the effect of rotating the OTA
> ~around the OA, I'm not sure this is required unless you also want to adjust
> the alt bearings to be concentric.



--
Clear skies, Mel Bartels // Programmer/Analyst, amateur astronomer
Springfield, Oregon,     // USA homepage: http://www.efn.org/~mbartels
mailto:mbartels@efn.org  // atm, atm-digest list-owner
Motorize A Dob: http://zebu.uoregon.edu/~mbartels/altaz/altaz.html