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Author Topic: PHD after Polemaster  (Read 1185 times)

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Offline Roger B

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PHD after Polemaster
« on: 00:29:08, 17 January, 2017 »
Tonight I tested the Polemaster, Borrowed from Mr Shep, on my belt modded EQ6.     Cheers Phil  :thumbup: :thumbup: :thumbup:

Anyway here's the resulting screen shot of the guiding graph ( In pixels Chris )   Very nice if you ask me,     I though my graph doing it by eye wasn't bad but this has made a vast improvement. 

It was easy to set up & align with Polemaster,  It may get into my inventory.

Rog   

 
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
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Offline psjshep

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Re: PHD after Polemaster
« Reply #1 on: 02:14:31, 17 January, 2017 »

It was easy to set up & align with Polemaster,  It may get into my inventory.
 

That one blummin' well won't....  :laugh: :laugh: :laugh:

Good stuff, Rog... it is pretty impressive &, once you get used to what it's asking, it's quick to do...

Phil
 
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Offline mechanoid

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Re: PHD after Polemaster
« Reply #2 on: 18:26:50, 20 February, 2017 »
Can anyone please explain why accurate polar alignment should have any effect at all on guiding performance ?  Other than perhaps eliminating the need for declination corrections altogether, which can be problematic sometimes, I fail to see what difference it should make.  Any polar misalignment error is only a once per day cycle, which would be completely eliminated by autoguiding.  Of course it has a major effect on field rotation,  but thats a different issue.

I've got a Polemaster permanently fixed to my mount, and its incredibly quick and easy to use. I'll never do star drift alignment again - hooray !

Dave
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Skywatcher ST80, QHY5II, PHD2
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Offline Einari

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Re: PHD after Polemaster
« Reply #3 on: 18:50:13, 20 February, 2017 »
I think it's not critical but the less corrections autoguiding has to do the better.
And like you said there's the rotation effect which is to be avoided especially with longer subs.
Tapio

Celestron C8, C9.25" & Hyperstar, iOptron CEM60-EC, TS 80 triplet,  Coronado PST, SXV-694,  ASI120MM/ASI174MC Cool

Offline chris.bailey

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Re: PHD after Polemaster
« Reply #4 on: 19:02:31, 20 February, 2017 »
Polar Alignment to minimise field rotation, minimise Dec drift and minimise total drift are all at slightly different elevations so you can't have it all ways in any case. The refracted pole, which is what Polemaster aims for (especially with the advanced refraction bit added in), is something of a compromise on all of them. You have to be a long way off for field rotation to have an obvious impact even on 30 minutes subs.

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
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