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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
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Kevin Quin
, …
Roger Webster
22
Dec 17
Communication problem between PHD2 and Nitecrawler rotator?
On my setup the reverse flag in the ASCOM dialog literally does not work. Whether it's checked or
unread,
Communication problem between PHD2 and Nitecrawler rotator?
On my setup the reverse flag in the ASCOM dialog literally does not work. Whether it's checked or
Dec 17
astro...@gmail.com
,
Brian Valente
3
Dec 17
dark library does not match error
Thanks Brian. Will do. I'm actually using a QHY guider. I think I figured the problem. For some
unread,
dark library does not match error
Thanks Brian. Will do. I'm actually using a QHY guider. I think I figured the problem. For some
Dec 17
Sybrand Strauss
, …
Andy Galasso
4
Dec 16
Unknown image format
Hi Jon, Sorry to hear you had trouble with INDIGO after updating to 2.6.14. Unfortunately this is not
unread,
Unknown image format
Hi Jon, Sorry to hear you had trouble with INDIGO after updating to 2.6.14. Unfortunately this is not
Dec 16
Ed M
, …
Bryan
5
Dec 16
Reports "No star found" when star is clearly visible
Matt Your reply is on a different thread. Bryan On Tuesday, December 16, 2025 at 9:22:15 AM UTC-7
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Reports "No star found" when star is clearly visible
Matt Your reply is on a different thread. Bryan On Tuesday, December 16, 2025 at 9:22:15 AM UTC-7
Dec 16
Matt Brown
, …
Brian Valente
11
Dec 16
Guiding Issue
>>> Bruce pointed out that I did not perform a re-cal when changing the angle from the value
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Guiding Issue
>>> Bruce pointed out that I did not perform a re-cal when changing the angle from the value
Dec 16
Paul Wilson
,
Brian Valente
6
Dec 10
Lost calibration again?
Ok. Well I did only 180sec subs last night so I thought I might have flagged the wrong ones. Paul S.
unread,
Lost calibration again?
Ok. Well I did only 180sec subs last night so I thought I might have flagged the wrong ones. Paul S.
Dec 10
Kevin Wisdom
, …
Brian Valente
16
Dec 8
Massive guiding excursions with new mount
Kevin in general things look okay I don't think that's an accurate assessment of '
unread,
Massive guiding excursions with new mount
Kevin in general things look okay I don't think that's an accurate assessment of '
Dec 8
Glen
, …
Bruce Waddington
6
Dec 7
PHD2 Only seeing static after pressing loop.
Hi Glen. When you joined the group, I sent you some initial advice on isolating camera connection
unread,
PHD2 Only seeing static after pressing loop.
Hi Glen. When you joined the group, I sent you some initial advice on isolating camera connection
Dec 7
niteman1946
, …
Brian Valente
4
Dec 5
Checking Sidereal Tracking Mount Accuracy
Thanks Bruce and Bryan for the responses. I'll dig into your recommendations. Mark On Friday,
unread,
Checking Sidereal Tracking Mount Accuracy
Thanks Bruce and Bryan for the responses. I'll dig into your recommendations. Mark On Friday,
Dec 5
Alan Moore
, …
Bruce Waddington
6
Dec 4
Problems with a new mount
Yes, I was frustrated by that until I found the small "settings" icon right beside the
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Problems with a new mount
Yes, I was frustrated by that until I found the small "settings" icon right beside the
Dec 4
Ed M
,
Bruce Waddington
4
Dec 1
Dark library keeps disappearing
Just to avoid a lot of wasted time and frustration - you need to use the built-in 'Upload Logs
unread,
Dark library keeps disappearing
Just to avoid a lot of wasted time and frustration - you need to use the built-in 'Upload Logs
Dec 1
Mark McComiskey
,
Bruce Waddington
2
Nov 30
Recent Version
It's just a minor efficiency optimization. For non-encoder mounts, the CA works pretty hard to be
unread,
Recent Version
It's just a minor efficiency optimization. For non-encoder mounts, the CA works pretty hard to be
Nov 30
macd...@yahoo.com
,
bw_m...@earthlink.net
3
Nov 29
Copying profiles and dark libraries
Thank you, Bruce, I just saw the Import/ Export functions this morning. On Friday, November 28, 2025
unread,
Copying profiles and dark libraries
Thank you, Bruce, I just saw the Import/ Export functions this morning. On Friday, November 28, 2025
Nov 29
Richard Scott
, …
Dale Ghent
10
Nov 29
Guiding on a Geostationary Satellite
An encoder mount with RA and Declination tracking rates set to values derived by the satellite's
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Guiding on a Geostationary Satellite
An encoder mount with RA and Declination tracking rates set to values derived by the satellite's
Nov 29
Alois Regl
, …
Michael Waring
3
Nov 27
Svbony 205 not recognized in phd2
I believe this is a video-only camera, it doesn't deliver single frames required for guiding
unread,
Svbony 205 not recognized in phd2
I believe this is a video-only camera, it doesn't deliver single frames required for guiding
Nov 27
Paul Wilson
, …
Bryan
5
Nov 26
Guiding assitant
Paul PHD2 reports "up to date" with respect to the present General Build. In many cases,
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Guiding assitant
Paul PHD2 reports "up to date" with respect to the present General Build. In many cases,
Nov 26
Mat R
,
Bruce Waddington
2
Nov 25
Information about Transfert Fonction
Handled via private e-mail. Bruce On Tuesday, November 25, 2025 at 2:43:39 AM UTC-8 math.r...@gmail.
unread,
Information about Transfert Fonction
Handled via private e-mail. Bruce On Tuesday, November 25, 2025 at 2:43:39 AM UTC-8 math.r...@gmail.
Nov 25
ERIC MCELROY
, …
Brian Valente
9
Nov 24
Connecting a ZWO ASI2600MM Air
Connection issues resolved and now working as expected. The issue was nothing related to PHD2. But
unread,
Connecting a ZWO ASI2600MM Air
Connection issues resolved and now working as expected. The issue was nothing related to PHD2. But
Nov 24
ardr...@gmail.com
,
Bryan
3
Nov 24
Problems getting HEM44 to Calibrate
Turns out polar alignment might not have been "fine". Was able to calibrate after re-
unread,
Problems getting HEM44 to Calibrate
Turns out polar alignment might not have been "fine". Was able to calibrate after re-
Nov 24
Pawan Singh
,
Bruce Waddington
4
Nov 23
Help with PHD Star Lost recovery
I don't think I'd start by replacing the camera, the problem is much more likely to be coming
unread,
Help with PHD Star Lost recovery
I don't think I'd start by replacing the camera, the problem is much more likely to be coming
Nov 23
Paul Wilson
,
Brian Valente
7
Nov 23
Pulse guide RA
It's possible, diagnostic images for lost star events would show us On Sun, Nov 23, 2025 at 8:21
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Pulse guide RA
It's possible, diagnostic images for lost star events would show us On Sun, Nov 23, 2025 at 8:21
Nov 23
Matt Brown
,
Bruce Waddington
3
Nov 19
PHD2 Crashing
The debug log shows you've gotten fouled up with the guide camera connection - you have PHD2
unread,
PHD2 Crashing
The debug log shows you've gotten fouled up with the guide camera connection - you have PHD2
Nov 19
Matt Brown
,
Bruce Waddington
2
Nov 19
Test Post
Newly added members are moderated at first, then are taken off moderated status after we see they are
unread,
Test Post
Newly added members are moderated at first, then are taken off moderated status after we see they are
Nov 19
G-Man 007
2
Nov 18
PHD2 with Celestron CPWI or Celestron Unified Driver 6.1.7350
Update, so I switched to iPolar Polarscope so does anyone have experience with using CPWI and CUD 6.1
unread,
PHD2 with Celestron CPWI or Celestron Unified Driver 6.1.7350
Update, so I switched to iPolar Polarscope so does anyone have experience with using CPWI and CUD 6.1
Nov 18
Elusive Photons
,
Bruce Waddington
5
Nov 18
Voyager & PHD2 Calibration
You ask "is it bad to calibrate at the Dec of your target?" I would say it ranges from
unread,
Voyager & PHD2 Calibration
You ask "is it bad to calibrate at the Dec of your target?" I would say it ranges from
Nov 18
BigDan
, …
Bruce Waddington
5
Nov 18
COM Problem with PHD2
If you update to our latest dev release, 2.6.13dev8, you can use the new-profile-wizard to create a
unread,
COM Problem with PHD2
If you update to our latest dev release, 2.6.13dev8, you can use the new-profile-wizard to create a
Nov 18
Filippo bonfante
,
Bruce Waddington
4
Nov 18
ASCOM DRIVER FAILED CHECHINK IS PULSEGUIDING
ty for the answer, Bruce. I will try to reinstall ascom and gs server. ty Il giorno lunedì 17
unread,
ASCOM DRIVER FAILED CHECHINK IS PULSEGUIDING
ty for the answer, Bruce. I will try to reinstall ascom and gs server. ty Il giorno lunedì 17
Nov 18
Michael Stadtmauer
, …
Elusive Photons
5
Nov 17
DirectGuide un-selects itself
Just wanted to post that the fix for this 'bug' is to ensure that 'Stop Guiding When
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DirectGuide un-selects itself
Just wanted to post that the fix for this 'bug' is to ensure that 'Stop Guiding When
Nov 17
Jeff Ratino
,
bw_m...@earthlink.net
20
Nov 14
Major issues with my Tracking/Guiding
This shouldn't be hard, there shouldn't be any trial and error needed or anything to remember
unread,
Major issues with my Tracking/Guiding
This shouldn't be hard, there shouldn't be any trial and error needed or anything to remember
Nov 14
Kevin McQuown
,
Bruce Waddington
6
Nov 14
Struggling with what might be wrong with my PHD2 calibration
I see it. I have disconnected the rotator completely.
unread,
Struggling with what might be wrong with my PHD2 calibration
I see it. I have disconnected the rotator completely.
Nov 14