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Old 16-09-2014, 06:14 AM
Garbz (Chris)
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Garbz is offline
Join Date: May 2012
Location: Brisbane
Posts: 639
Originally Posted by AndrewJ View Post
I have no idea why PHD2 uses 2 discrete angles, as there is no way to properly measure the DEC angle due to the PE in the RA drive????
If you don't use 2 discrete values then then how can you account for a mount that isn't perfectly polar aligned? If the angles aren't 90deg apart then it's a good sign your alignment is wrong.

Also I can guess that during calibration the PE of the RA axis would be so insignificantly small compared to the step sizes used for calibration that it probably doesn't matter.
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