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Old 23-05-2010, 08:27 AM
AndrewJ
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AndrewJ is offline
 
Join Date: Mar 2006
Location: Melbourne
Posts: 1,905
Gday Matt

If you did an "Easy Align" in Polar, it actually invokes the Polar One star align. As such, there is no "misalignment matrix" created for gotos, and hence the accuracy of all gotos depends on the accuracy of your wedge, and the orthogonality of your forks.
Now re the first, you noted
Quote:
I centred what I thought was Sigma
Did you follow the instructions EXACTLY???? ( I hope not )
Ie did you use the wedge controls to centre it????
If so, you have probably screwed up your alignment
The Meade One Star routine "assumes" everything associated with the "scope" is perfect at start ( ie its at perfect HA=0 and the OTA is at "perfect" 90deg ) and that all errors are due to the wedge.
It then uses this "assumed" start posn to slew to where it thinks Sig Oct is, and asks you to adjust the wedge to centre it
( as it has to be the wedge in error, right )

If you have drift aligned the scope first, you "know" the RA axis is pointing at the pole, so the error is probably really associated with the scope.
In this case, ie you are happy the scope is well drift aligned first, you still do a one star align, but when prompted to centre Sig Oct, you just hit enter, dont even bother to look.
Centre the second star when requested and you will be away.

Andrew
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