Message Board: Re: Question about the whole procedure of Goto

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Re: Question about the whole procedure of Goto

Posted by Lenord on May 16, 2002, 12:51 pm

Hi Joanna,
There is an algorythm(sp) that Mel uses in the scope.exe software. It was published in S& T a long time ago. It computes the distance to the object based on the location of the stars the scope is aligned to. This computation is done for each axis. Mel has a page about it at the link below.
It is neat to see a scope slew in both axis' for a bit, then move one axis some more, then move each a tiny bit. The last little bit compensates for the time it took to slew the scope for each axis, compensate for gear backlash and mount error corrections.
The math that is involved is not difficult but would take an average person with a pen and paper a lot longer to do.
All of this is done in the background, the user never see's it, BTW.
HTH
Lenord
--Previous Message--
: : Just curious to know, how does a telescope
: move to get to a Goto Location. Is it the
: shortest
: path of direction? I am not so mechanically
: inclined but wondered how it at all happens.
: If a dual drive telescope has Goto Capability
: how does it determine, who moves for how long
: in one direction and then when to change it
: to a new direction.
: Sorry for the mess of a question. I hope its
: clear.
: Thanks in advance for your time.
:
:

Link: http://www.bbastrodesigns.com/cot/software.html

Message Thread:

Question about the whole procedure of Goto - Joanna May 16, 2002, 12:18 pm
- Re: Question about the whole procedure of Goto - Lenord May 16, 2002, 12:51 pm
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--Previous Message-- : Hi Joanna, : : There is an algorythm(sp) that Mel uses in : the scope.exe software. It was published in : S& T a long time ago. It computes the : distance to the object based on the location : of the stars the scope is aligned to. This : computation is done for each axis. Mel has a : page about it at the link below. : : It is neat to see a scope slew in both axis' : for a bit, then move one axis some more, : then move each a tiny bit. The last little : bit compensates for the time it took to slew : the scope for each axis, compensate for gear : backlash and mount error corrections. : The math that is involved is not difficult : but would take an average person with a pen : and paper a lot longer to do. : All of this is done in the background, the : user never see's it, BTW. : : HTH : Lenord : : : : --Previous Message-- : : Just curious to know, how does a telescope : move to get to a Goto Location. Is it the : shortest : path of direction? I am not so mechanically : inclined but wondered how it at all happens. : If a dual drive telescope has Goto : Capability : how does it determine, who moves for how : long : in one direction and then when to change it : to a new direction. : Sorry for the mess of a question. I hope its : clear. : Thanks in advance for your time. : : : : :

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