Hi Ray,
Thanks for your post, this is exactly what I am seeing and definitely affects my guiding. I think you will find the guiding engine in PHD and PHD2 will be either identical or very very similar so I doubt this had any affect.
I wrote a bit more about the issue here:
http://www.astrophotography.id.au/eq...in-a-dark-sky/ and I would be interested if you too have a "normal" point and a sloppy point in declination??? It takes a while to check but that was the only way I could get a handle on the issue.
Cheers
Anthony
Quote:
Originally Posted by librarian
Hi picked up my EQ8 and i see an issue with backlash, or at least i assume its a backlash issue!
I can certainly feel backlash if i lock up the axis and rock the scope, but it does not feel too excessive!
Where i do see it is when calibrating for guiding...it takes a while for the calibration process to remove the backlash and then (as it should) it calibrates North, however when it comes to calibrating South..i see very little movement over 12 + steps and i see a large jump to centre the star on completion of calibration.
it makes me wonder if PHD has calibrated correctly.
At first i thought that the issue was with PHD 2 since i used this when 1st trying it, however i see it also in the original PHD
It appears to guide o.k. after a settling in time, but initially it is slow to correct drift in Declination which i put down to backlash!!
Ray
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