Groups
Groups
Sign in
Groups
Groups
Open PHD Guiding
Conversations
Labels
About
Send feedback
Help
Open PHD Guiding
Contact owners and managers
1–30 of 7085
Welcome to the
Open PHD Guiding
(PHD2) forum, telescope guiding software for astro-photographers.
To get help with PHD2, please upload your log files - here's how:
How to ask for help with PHD2
.
If you are new to PHD2, we urge you to read the
documentation
and
follow these tips:
Use the forum search tools - most questions have been answered many times
Read and follow the
Best Practices Guide
Use the New-Profile-Wizard to define and manage your equipment configurations
Avoid making changes to guiding parameters without knowing exactly what they do
After you get a good calibration run and a Guiding Assistant Run, per the Best Practices, run the
Baseline Assessment
Forum guidelines for vendors
.
Mark all as read
Report group
0 selected
NY2KW
, …
Bruce Waddington
11
Jun 2
Newbie - Understanding RA Variability
As we've suggested, I think you're past the point where staring at the guide logs is useful.
unread,
Newbie - Understanding RA Variability
As we've suggested, I think you're past the point where staring at the guide logs is useful.
Jun 2
Richard Brown
, …
Brian Valente
7
Jun 2
Guiding Using The Guiding Module Camera On Star'Ex Spectroscope
>>>I think it was a faulty cable that definitely happens, hopefully you've found the
unread,
Guiding Using The Guiding Module Camera On Star'Ex Spectroscope
>>>I think it was a faulty cable that definitely happens, hopefully you've found the
Jun 2
PartlyC
, …
Bruce Waddington
6
May 30
Adjust Lock Position - Is this what I think it might be?
Trying experimenting with it this way: 1. Make sure you are guiding normally with the guider exposure
unread,
Adjust Lock Position - Is this what I think it might be?
Trying experimenting with it this way: 1. Make sure you are guiding normally with the guider exposure
May 30
NY2KW
, …
Brian Valente
6
May 29
Wave 150i RA Hysteresis v. PPEC
Do you have a picture from the opposite side? the guiding setup and the CAA is blocked by the ASIAir
unread,
Wave 150i RA Hysteresis v. PPEC
Do you have a picture from the opposite side? the guiding setup and the CAA is blocked by the ASIAir
May 29
NY2KW
,
Bruce Waddington
2
May 29
Are Posts Moderated?
Your initial post after joining is moderated, I explained that in the 'welcome' message I
unread,
Are Posts Moderated?
Your initial post after joining is moderated, I explained that in the 'welcome' message I
May 29
Rob Smith
, …
Bruce Waddington
4
May 27
ZWO / PHD Calibration issue
The log files you uploaded were from a session on 5/24 and they show a reasonable calibration using
unread,
ZWO / PHD Calibration issue
The log files you uploaded were from a session on 5/24 and they show a reasonable calibration using
May 27
robert.s...@gmail.com
, …
Richard Scott
4
May 23
Improvement to Auto-star-selection process
Hi Bruce, This is great information to know and something I haven't seen in the manual. I too
unread,
Improvement to Auto-star-selection process
Hi Bruce, This is great information to know and something I haven't seen in the manual. I too
May 23
sai...@suddenlink.net
, …
Douglas K Duncan
9
May 19
New CEM70 mount and poor guiding
Where do you get seeing that good? I'm envious. Sent from my iPhone On May 18, 2026, at 6:23 PM,
unread,
New CEM70 mount and poor guiding
Where do you get seeing that good? I'm envious. Sent from my iPhone On May 18, 2026, at 6:23 PM,
May 19
Tim Moody
,
Bruce Waddington
6
May 19
save guider images
In addition to the various diagnostic imaging options, you can always do a File/Save to capture
unread,
save guider images
In addition to the various diagnostic imaging options, you can always do a File/Save to capture
May 19
Graham Smith
,
Brian Valente
4
May 17
Guiding accuracy differences between targets
>>>I ran guide assistant after the calibration and I think that is the 1st 3 minutes. Would
unread,
Guiding accuracy differences between targets
>>>I ran guide assistant after the calibration and I think that is the 1st 3 minutes. Would
May 17
sarg314
, …
Brian Valente
5
May 17
integration times
>>>Do harmonic mounts have a preferred preload direction - in the easterly or westerly
unread,
integration times
>>>Do harmonic mounts have a preferred preload direction - in the easterly or westerly
May 17
umasscrew39
, …
Brian Valente
7
May 17
Guiding only working on one side of the meridian
FYI.... I applied the PPEC settings to 'mimic' a PE curve as you suggested. It made a very
unread,
Guiding only working on one side of the meridian
FYI.... I applied the PPEC settings to 'mimic' a PE curve as you suggested. It made a very
May 17
John Rightten
, …
Bruce Waddington
21
May 16
Help Interpret PHD2 log, is my polar alignment good enough?
If you get a decent calibration, just keep using it, you're not going to get anywhere trying to
unread,
Help Interpret PHD2 log, is my polar alignment good enough?
If you get a decent calibration, just keep using it, you're not going to get anywhere trying to
May 16
Phil Bordelon
,
Brian Valente
4
May 16
Elongated stars after new profile/calibration/baseline
Sounds good Phil Brian On Fri, May 15, 2026 at 8:54 PM Phil Bordelon <pbor...@gmail.com>
unread,
Elongated stars after new profile/calibration/baseline
Sounds good Phil Brian On Fri, May 15, 2026 at 8:54 PM Phil Bordelon <pbor...@gmail.com>
May 16
Behyar Bakhshandeh
, …
Brian Valente
4
May 14
Guiding Runs Away After NINA Meridian Flip
Hi Behyar This may take some more analysis. You have a number of errors with your equipment including
unread,
Guiding Runs Away After NINA Meridian Flip
Hi Behyar This may take some more analysis. You have a number of errors with your equipment including
May 14
pauls...@gmail.com
,
Brian Valente
3
May 13
message indicating DEC guiding problem
thanks for reply Brian, much appreciated. re your numbered points: 1 - I use NINA and neglected to
unread,
message indicating DEC guiding problem
thanks for reply Brian, much appreciated. re your numbered points: 1 - I use NINA and neglected to
May 13
mario.mor...@gmail.com
,
Ralph Waid
4
May 4
QHY5-II driver for Windows XP
Thank you very much !! I will now look at the indicated sites. El lunes, 4 de mayo de 2026 a las 15:
unread,
QHY5-II driver for Windows XP
Thank you very much !! I will now look at the indicated sites. El lunes, 4 de mayo de 2026 a las 15:
May 4
Alan Moore
,
Brian Valente
2
May 3
Fuiding problem
Hi Alan I think your reverse dec option is set incorrectly. You can see it accelerating away as
unread,
Fuiding problem
Hi Alan I think your reverse dec option is set incorrectly. You can see it accelerating away as
May 3
William Schubert
,
Ken H
4
May 3
ZWO ASI 174 won't connect to PHD
I see where suggestions that I need ASCOM drivers, but that shouldn't apply to Mac computers. For
unread,
ZWO ASI 174 won't connect to PHD
I see where suggestions that I need ASCOM drivers, but that shouldn't apply to Mac computers. For
May 3
Alan Moore
,
Bruce Waddington
2
May 3
Guiding help
You need to follow the instructions for 'getting help' and post both your guide and debug log
unread,
Guiding help
You need to follow the instructions for 'getting help' and post both your guide and debug log
May 3
Enea Ferriani
,
Bruce Waddington
2
Apr 30
PHD-2 & meridian flip issue
I don't really understand the problem you're having, but you're not required to use the
unread,
PHD-2 & meridian flip issue
I don't really understand the problem you're having, but you're not required to use the
Apr 30
Gary
,
Bruce Waddington
5
Apr 29
Guiding
Thank-you, interesting that the imaging app (sharpcap) didn't tell guiding to stop (and then
unread,
Guiding
Thank-you, interesting that the imaging app (sharpcap) didn't tell guiding to stop (and then
Apr 29
Christophe Godefroy
,
Bruce Waddington
5
Apr 28
AM5 guiding issues
dear Bruce, here is the result of the night https://openphdguiding.org/logs/dl/PHD2_logs_johq.zip it
unread,
AM5 guiding issues
dear Bruce, here is the result of the night https://openphdguiding.org/logs/dl/PHD2_logs_johq.zip it
Apr 28
Derek Fage
,
Bruce Waddington
3
Apr 25
Strange problem where DEC starts shooting North
Thanks Bruce, It was polar aligned to about 5' as I know I've got bad DEC backlash and one of
unread,
Strange problem where DEC starts shooting North
Thanks Bruce, It was polar aligned to about 5' as I know I've got bad DEC backlash and one of
Apr 25
Robert Anderson
, …
Bruce Waddington
5
Apr 24
PHD Guiding keeps stopping during image runs
Thanks Bruce. Thanks for ruling out PHD2. I have the app pretty well tuned and this opportunity
unread,
PHD Guiding keeps stopping during image runs
Thanks Bruce. Thanks for ruling out PHD2. I have the app pretty well tuned and this opportunity
Apr 24
Bob Hughes
,
Brian Valente
2
Apr 24
Loosing Lock on guide star.
Bob Please upload your guidelogs: https://openphdguiding.org/getting-help/ On Fri, Apr 24, 2026 at 1:
unread,
Loosing Lock on guide star.
Bob Please upload your guidelogs: https://openphdguiding.org/getting-help/ On Fri, Apr 24, 2026 at 1:
Apr 24
Ross Salinger
, …
Yannick
6
Apr 21
Alpaca and PHD
Sorry to interfect, what's the roadmap like for native Alpaca support in PHD2? On Sunday, April 5
unread,
Alpaca and PHD
Sorry to interfect, what's the roadmap like for native Alpaca support in PHD2? On Sunday, April 5
Apr 21
Michel Meunier
, …
Brian Valente
6
Apr 20
Transfer calibration data between two PC
Thanks again, the guiding was perfect without a new calibration Michel Le dimanche 19 avril 2026 à 23
unread,
Transfer calibration data between two PC
Thanks again, the guiding was perfect without a new calibration Michel Le dimanche 19 avril 2026 à 23
Apr 20
Don Waters
, …
Michael Waring
3
Apr 20
CGEM TRACKING does not resume after Drift Align
Maybe Don means "guiding does not restart", not "tracking" ? There are only two
unread,
CGEM TRACKING does not resume after Drift Align
Maybe Don means "guiding does not restart", not "tracking" ? There are only two
Apr 20
Gregory
,
Bruce Waddington
5
Apr 19
autoguiding with star adventurer 2i
Bruce, Thanks for the info. I had all the cables hooked up correctly but couldn't figure out to
unread,
autoguiding with star adventurer 2i
Bruce, Thanks for the info. I had all the cables hooked up correctly but couldn't figure out to
Apr 19