On Wed, May 20, 2020 at 02:54 PM, Timothy Campbell wrote:
That depends on the rings. ?These rings are rock solid and a huge improvement in stability: ??
Thanks for that link, Timothy. Always glad to take a look at things beyond the mainstream. Considering something to do with my extra Losmandy bar in the way of making my imaging train more stable.
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I would second the advice of reducing the correction time in PHD. Default is 1 second, I sometimes use 0.5 seconds. Why?
Because smaller corrective actions can help keep the rig working in a much closer proximity, than taking giant steps to try and correct 4 seconds of drift and error. Little blips, not big jumps.
Something that helped me with PHD was these tutorials, and . Then I was able to do some minor changes to get the guiding I needed for my imaging. Changes in the PHD program to experiment with how PHD interacted with my mount. (An AVX POS, and now my GM811G which is galaxies away from the Asian Junks.)
But each set-up and Mount, IMHO, requires the individual to experiment a bit, to find what works ideally for your exact needs. Because the biggest inconsistency in this is that we all run vastly different set-ups, in different locations.
But try to begin at something more basic, then work from there.
I would not, and do not endorse, any mechanical tweaking. You could very easily create more problems than you could correct.
So don't dig a hole you can't climb out of. Fiddle with the PHD program all you want.
But don't trust PHD to be a Standard by which you can reliably do any changes to your mount itself.
PHD is a guiding program, and a damn good one. But it is not of the caliber to go trusting to be changing things we do not usually have a proper understanding of.
In fact, I do not worry a lot about the graph in PHD. It is entertaining, but that is it.
The Proof in the Puddin is in the image you gather. Spend enough time finding the settings in PHD that work well with your equipment.
And don't look at PHD as a calibrator for your Mount. Because it is far from worthy of such trust.
But little Blips of correction, and smaller steps, with more often (Shorter) intervals.
As you begin to see a smoother graph, then you can change your "y" to smaller amounts, and see how your settings are refining your guiding pulses.
Some of my graphs are nothing to write home about, they look awful. If you think yours are just too ugly, change your "y" to 16 and fool your friends with how flat your graph is. ;^)
I was born in the dark, but it wasn't last night.
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SonnyE
(I suggest viewed in full screen)
