Groups
Groups
Sign in
Groups
Groups
Open PHD Guiding
Conversations
Labels
About
Send feedback
Help
Group path
Open PHD Guiding
Contact owners and managers
1–30 of 7161
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
Reinhold Friedrich Auer
, …
Brian Valente
9
Oct 7
Guiding a 10Micron GM4000 with aboldut encoders
Thanks Reinhold Fr. Auer Dipl. Ing. /FH) Chudčice 273 CZ - 66471 Veverská Bítýška tel. +420 605 55 38
unread,
Guiding a 10Micron GM4000 with aboldut encoders
Thanks Reinhold Fr. Auer Dipl. Ing. /FH) Chudčice 273 CZ - 66471 Veverská Bítýška tel. +420 605 55 38
Oct 7
Erik Wessner
Oct 7
sudden poor guiding performance and loss of tracking in RA
Tonight I suddenly started having really poor guiding performance, took a reinstall and a few
unread,
sudden poor guiding performance and loss of tracking in RA
Tonight I suddenly started having really poor guiding performance, took a reinstall and a few
Oct 7
Julio Maset
,
Bruce Waddington
5
Oct 6
PHD2 losses multiple stars selection after a meridian flip or slew after drift
You should be fine going forward - have fun. Bruce Bruce On Monday, October 5, 2026 at 8:53:59 PM UTC
unread,
PHD2 losses multiple stars selection after a meridian flip or slew after drift
You should be fine going forward - have fun. Bruce Bruce On Monday, October 5, 2026 at 8:53:59 PM UTC
Oct 6
Jeff M
, …
Frederic Ruciak
14
Oct 4
Elongated/Egg shaped stars
Bruce and Brian, Thank you for your help. I was able to test the AM7 last night and I changed guiding
unread,
Elongated/Egg shaped stars
Bruce and Brian, Thank you for your help. I was able to test the AM7 last night and I changed guiding
Oct 4
Jack Bernstein
Oct 3
Re: [open-phd-guiding] Digest for open-phd-guiding@googlegroups.com - 2 updates in 1 topic
In the end, I installed the Optec ASCOM Hub. This worked great and the rotator now works in NINA and
unread,
Re: [open-phd-guiding] Digest for open-phd-guiding@googlegroups.com - 2 updates in 1 topic
In the end, I installed the Optec ASCOM Hub. This worked great and the rotator now works in NINA and
Oct 3
Malcolm Park
, …
Brian Valente
5
Oct 3
ZWO CAA rotator
Jack This isn't something that is PHD-specific. i poked around a bit on this topic and it sounds
unread,
ZWO CAA rotator
Jack This isn't something that is PHD-specific. i poked around a bit on this topic and it sounds
Oct 3
Gianluca Rossi
,
Bruce Waddington
2
Sep 29
PHD2 stopped functioning
At 03:40, your session manager app - probably NINA - told PHD2 to stop guiding: 03:40:09.689 00.024
unread,
PHD2 stopped functioning
At 03:40, your session manager app - probably NINA - told PHD2 to stop guiding: 03:40:09.689 00.024
Sep 29
Blue Cheese
, …
Brian Valente
6
Sep 27
KStars & Settling failed
>>>How do I change this setting in PHD2? And how do I go about debugging why it doesn't
unread,
KStars & Settling failed
>>>How do I change this setting in PHD2? And how do I go about debugging why it doesn't
Sep 27
Jack Bernstein
, …
Bryan
4
Sep 26
Drivers for ASI220MM
Jack Note that there are ALWAYS logs, even if you don't guide. Hence, they may provide useful
unread,
Drivers for ASI220MM
Jack Note that there are ALWAYS logs, even if you don't guide. Hence, they may provide useful
Sep 26
NHSA
,
Bruce Waddington
3
Sep 23
Choosing a ROI for guiding (not subframe)
Thanks, and where do I find the PHD server interface? or better said how do I open it? I have no
unread,
Choosing a ROI for guiding (not subframe)
Thanks, and where do I find the PHD server interface? or better said how do I open it? I have no
Sep 23
Behyar Bakhshandeh
, …
Brian Valente
10
Sep 18
DEC Guiding issue, post flip
Confirmed it was locking on an internal reflection. At first it was hard to tell in the star window
unread,
DEC Guiding issue, post flip
Confirmed it was locking on an internal reflection. At first it was hard to tell in the star window
Sep 18
Dan
, …
Brian Valente
8
Sep 17
short stretch of elongated stars
good catch. Your guidescope setup is still suspect re: rings and thumbscrews, but tightening up what
unread,
short stretch of elongated stars
good catch. Your guidescope setup is still suspect re: rings and thumbscrews, but tightening up what
Sep 17
John Coffin
, …
Bruce Waddington
6
Sep 16
PHD doesn't move my mount in RA but will move it in Dec
Just to be clear, tightening the driver belt for RA didn't help. On Wednesday, 16 September 2026
unread,
PHD doesn't move my mount in RA but will move it in Dec
Just to be clear, tightening the driver belt for RA didn't help. On Wednesday, 16 September 2026
Sep 16
Reinhold Friedrich Auer
, …
Andy Galasso
23
Sep 14
Camera C1-500A Morvian Instruments cannot be connected
Reinhold, I'll email you directly so we can work through this. Andy On Sun, Sep 13, 2026 at 1:42
unread,
Camera C1-500A Morvian Instruments cannot be connected
Reinhold, I'll email you directly so we can work through this. Andy On Sun, Sep 13, 2026 at 1:42
Sep 14
J P
Sep 10
Guiding Chip 220mm of ASI2600mc air delivers no image, loop ended with time out
Hi , I have a connection issue with PHD2 and ASI 2600mc air. It is impossible getting an image from
unread,
Guiding Chip 220mm of ASI2600mc air delivers no image, loop ended with time out
Hi , I have a connection issue with PHD2 and ASI 2600mc air. It is impossible getting an image from
Sep 10
S Am
, …
stephcha...@gmail.com
8
Sep 9
DEC guiding issue
Hi, Here is the tutorial I followed : https://www.youtube.com/watch?v=jZ4LxtE6TzU I actually noticed
unread,
DEC guiding issue
Hi, Here is the tutorial I followed : https://www.youtube.com/watch?v=jZ4LxtE6TzU I actually noticed
Sep 9
W Sc
, …
Brian Valente
12
Aug 31
Advice requested on dealing with backlash
>>> I re ran calibration and Im not sure how to upload to this thread. log upload is the
unread,
Advice requested on dealing with backlash
>>> I re ran calibration and Im not sure how to upload to this thread. log upload is the
Aug 31
LJ Y
,
Bruce Waddington
3
Aug 22
Possible 8-bit signed-char bug in native ToupTek driver
Update: we happen to have one of these cameras and can see the problem in 2.6.14. It will be fixed in
unread,
Possible 8-bit signed-char bug in native ToupTek driver
Update: we happen to have one of these cameras and can see the problem in 2.6.14. It will be fixed in
Aug 22
Allan Saul
, …
Bruce Waddington
6
Aug 22
Problems with SV305M Pro
Thanks for letting us know - happy imaging... Bruce On Saturday, August 22, 2026 at 7:13:55 PM UTC-7
unread,
Problems with SV305M Pro
Thanks for letting us know - happy imaging... Bruce On Saturday, August 22, 2026 at 7:13:55 PM UTC-7
Aug 22
Alan Moore
,
Bruce Waddington
3
Aug 19
Intermittent guiding success
Thank you. I'm using the ASI 2600 MM Duo, which has a guide camera incorporated into the main
unread,
Intermittent guiding success
Thank you. I'm using the ASI 2600 MM Duo, which has a guide camera incorporated into the main
Aug 19
pauls...@gmail.com
, …
Brian Valente
6
Aug 19
strange declination guiding
Please see attached an image from the synscan app's Backlash option settings. many thanks, Paul
unread,
strange declination guiding
Please see attached an image from the synscan app's Backlash option settings. many thanks, Paul
Aug 19
Steven Bellavia
, …
bw_m...@earthlink.net
7
Aug 17
Guiding stopped: the scope started slewing
Thanks. Yeah, I have to watch where that cursor is. On another night, in the middle of an image, I
unread,
Guiding stopped: the scope started slewing
Thanks. Yeah, I have to watch where that cursor is. On another night, in the middle of an image, I
Aug 17
Ross Salinger
, …
Bruce Waddington
8
Aug 17
Alpaca and PHD
I don't think we need to go down this road. We currently have an internal build with an
unread,
Alpaca and PHD
I don't think we need to go down this road. We currently have an internal build with an
Aug 17
Armando Vaccaro
, …
Bruce Waddington
4
Aug 16
Issue with PHD2 Pulse Guiding over USB on Fornax 52 / Ursa Minor MC5
You need to communicate with the person who "owns" the ASCOM driver - either the author or
unread,
Issue with PHD2 Pulse Guiding over USB on Fornax 52 / Ursa Minor MC5
You need to communicate with the person who "owns" the ASCOM driver - either the author or
Aug 16
Jos Bodden
, …
Bruce Waddington
4
Aug 16
PHD2 and AM5N mount
Thank you very much Tim this is certainly a useful answer. I take this that for an AM5N you have to
unread,
PHD2 and AM5N mount
Thank you very much Tim this is certainly a useful answer. I take this that for an AM5N you have to
Aug 16
Andy Nowlen
,
Bruce Waddington
2
Aug 15
Calibrating Errors
Hi Andy. If we go back to the first night when the problem first appeared, what I see is that things
unread,
Calibrating Errors
Hi Andy. If we go back to the first night when the problem first appeared, what I see is that things
Aug 15
Sanjeev Joshi
, …
Franklin Shaffer
19
Aug 15
Interesting problem Dec axis with iOptron CEM 70 EC2
Wanted to provide a quick update. The Dec backlash was mechanically reduced from 4700 ms to 2200 ms.
unread,
Interesting problem Dec axis with iOptron CEM 70 EC2
Wanted to provide a quick update. The Dec backlash was mechanically reduced from 4700 ms to 2200 ms.
Aug 15
Bruce Waddington
Aug 12
Re: Dark Library Data Lost When Switching Between Camera Profiles
I'm not able to sort through all this. When you have made your best effort on this without
unread,
Re: Dark Library Data Lost When Switching Between Camera Profiles
I'm not able to sort through all this. When you have made your best effort on this without
Aug 12
Reinhold Friedrich Auer
,
Bruce Waddington
3
Aug 7
Guiding camera S1-5000A from Moravian Intruments
bw_m...@earthlink.net schrieb am Sonntag, 2. August 2026 um 19:59:59 UTC+2: As far as we can tell,
unread,
Guiding camera S1-5000A from Moravian Intruments
bw_m...@earthlink.net schrieb am Sonntag, 2. August 2026 um 19:59:59 UTC+2: As far as we can tell,
Aug 7
David Ridge
,
Bruce Waddington
3
Aug 6
Meridian Flip caused guiding to stop?
thanks. Cables! :( :) David On Thursday, August 6, 2026 at 2:58:58 PM UTC-6 bw_m...@earthlink.net
unread,
Meridian Flip caused guiding to stop?
thanks. Cables! :( :) David On Thursday, August 6, 2026 at 2:58:58 PM UTC-6 bw_m...@earthlink.net
Aug 6