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Author Topic: help with phd 2 guiding advanced setup  (Read 5911 times)

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Offline doseri

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help with phd 2 guiding advanced setup
« on: 14:43:34, 04 October, 2014 »
hi

Any advice on how to setup of PHD2 , I'm using ST-80 with meade dsi pro , and main scope gso 200f/5 with canon500d ,i was trying since 4 nights unfortunately i can't get any luck to get the optimal perimeter in PHD2 for guiding over 5 minutes. my guiding graph was spiking in both access and i don't know where the issue is attached is my advance setting

regards,

sam

Offline Roger B

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Re: help with phd 2 guiding advanced setup
« Reply #1 on: 16:19:55, 04 October, 2014 »
I've never used PHD2   but a couple of things stick out to my PHD settings

Min move pixels mines set to 0.25  0.06 may be too small
and your dec guiding is north,  mines Auto    If it bounces back an forth,  try reducing the aggression

Roger
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Offline chris.bailey

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Re: help with phd 2 guiding advanced setup
« Reply #2 on: 17:20:34, 04 October, 2014 »
Yep, plus dec algorithm as "resist switching". Having Dec guide as North only AND with Hysteresis as the algorithm with quite aggressive settings will mean overshoot occurs and because it can only issue guide corrections in one direction, it may never get back again. If guiding corrections are constant back and forth then reduce aggressiveness. 85% is quite aggressive.

With a fairly wide field setup you can afford the guiding to be quite relaxed so I would set minimum guide to about 0.3 pixels and turn aggressiveness down to about 60% and see how that runs.

Chris
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Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #3 on: 17:35:17, 04 October, 2014 »
Can you share your phd guiding setting with me

Offline chris.bailey

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Re: help with phd 2 guiding advanced setup
« Reply #4 on: 17:58:15, 04 October, 2014 »
Mine is currently setup for a very different guide setup so you don't want mine but plug in what Roger and I have suggested and give it a try.
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #5 on: 19:27:46, 04 October, 2014 »
my guiding  scope is orion st-80 & meade dsi pro 1 guiding cam ,any more Suggestions ????

is there any calculating  software ????

Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #6 on: 09:08:50, 05 October, 2014 »
hi

in the attachment you can see the phd graph

Offline Einari

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Re: help with phd 2 guiding advanced setup
« Reply #7 on: 12:41:13, 05 October, 2014 »
That doesn't look bad (if there are no bigger spikes).
Are you getting round stars now ?

Like Chris said try these:
"set minimum guide to about 0.3 pixels and turn aggressiveness down to about 60% and see how that runs"
Tapio

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

Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #8 on: 12:52:16, 05 October, 2014 »
 I try last night but no lock to get good round stars , i do not know what's is the issue

Offline chris.bailey

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Re: help with phd 2 guiding advanced setup
« Reply #9 on: 15:20:47, 05 October, 2014 »
Most of your guide corrections on that graph are in one direction in RA and all of them in DEC. Its therefore constantly undershooting. Increase aggressiveness and if necessary increase the guide speed (probably set at 0.5 sidereal). I would still expect reasonable star shapes from that however based on an RMS of 0.27.

What mount? Are you sure the star shape is not a function of collimation or tilt?
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
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Offline swashy

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Re: help with phd 2 guiding advanced setup
« Reply #10 on: 16:37:56, 05 October, 2014 »
I'd agree, the graph dosen't look bad, can you post up your image results
Ade

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Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #11 on: 16:51:05, 05 October, 2014 »
 My mount is the sky watcher neq6 pro., only 1 year old
Yes I think that from guiding if I do 3 min shoot the stars very sharp

Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #12 on: 17:02:23, 05 October, 2014 »
I'd agree, the graph dosen't look bad, can you post up your image results
Yes I will upload the image

Offline doseri

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Re: help with phd 2 guiding advanced setup
« Reply #13 on: 17:03:22, 05 October, 2014 »
Most of your guide corrections on that graph are in one direction in RA and all of them in DEC. Its therefore constantly undershooting. Increase aggressiveness and if necessary increase the guide speed (probably set at 0.5 sidereal). I would still expect reasonable star shapes from that however based on an RMS of 0.27.

What mount? Are you sure the star shape is not a function of collimation or tilt?
The skywatcher neq6 pro

Offline Einari

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Re: help with phd 2 guiding advanced setup
« Reply #14 on: 18:04:28, 05 October, 2014 »
Maybe it's field rotation then if 3 min exposure looks okay.
You've done proper polar align ?
Tapio

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

 

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