Date   

Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Erkaslan Aygen
 

Thank you Brian.

This what I fought, but wanted to be 100% sure. It’s a 10 Micron 1000 HPS.

Regards.
Aygen 

Le jeu. 7 avr. 2022 à 18:14, Brian Valente <bvalente@...> a écrit :
Hi  Aygen 

I think the point is leave encoders on, but don't have any modeling active when you do polar alignment

what mount is this?

Brian

On Thu, Apr 7, 2022 at 9:11 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
Thank you Ray.

Got it ! So, if there is still no model loaded in the mount it does not matter if the dual axis is on, right ? Or would you recommend to tie it off anyway and have it on afterwards ?

Aygen 

Le jeu. 7 avr. 2022 à 03:13, Ray Gralak <iogroups@...> a écrit :
Aygen,

Yes, leave the encoders on, but turn off dual-axis tracking if there is a model loaded for your mount.

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
> Sent: Wednesday, April 6, 2022 8:20 AM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment
>
> Hi Aygen
>
> you would leave the encoders on for polar alignment
>
> Brian
>
> On Wed, Apr 6, 2022 at 8:18 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
>
>
>       Hi Ray and astro-friends,
>
>       Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.
>
>       Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking
> while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the
> source ;(
>
>       Sorry for the silly question and thank you once again for your super kind help.
>
>       Regards,
>       Aygen
>
>
>        ual-axis absolute encoders
>
>
>
>
>
>
>
> --
>
> Brian
>
>
>
> Brian Valente
> portfolio brianvalentephotography.com  <http://brianvalentephotography.com>
>








--
Brian 



Brian Valente


Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

 

Hi  Aygen 

I think the point is leave encoders on, but don't have any modeling active when you do polar alignment

what mount is this?

Brian

On Thu, Apr 7, 2022 at 9:11 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
Thank you Ray.

Got it ! So, if there is still no model loaded in the mount it does not matter if the dual axis is on, right ? Or would you recommend to tie it off anyway and have it on afterwards ?

Aygen 

Le jeu. 7 avr. 2022 à 03:13, Ray Gralak <iogroups@...> a écrit :
Aygen,

Yes, leave the encoders on, but turn off dual-axis tracking if there is a model loaded for your mount.

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
> Sent: Wednesday, April 6, 2022 8:20 AM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment
>
> Hi Aygen
>
> you would leave the encoders on for polar alignment
>
> Brian
>
> On Wed, Apr 6, 2022 at 8:18 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
>
>
>       Hi Ray and astro-friends,
>
>       Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.
>
>       Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking
> while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the
> source ;(
>
>       Sorry for the silly question and thank you once again for your super kind help.
>
>       Regards,
>       Aygen
>
>
>        ual-axis absolute encoders
>
>
>
>
>
>
>
> --
>
> Brian
>
>
>
> Brian Valente
> portfolio brianvalentephotography.com  <http://brianvalentephotography.com>
>








--
Brian 



Brian Valente


Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Erkaslan Aygen
 

Thank you Ray.

Got it ! So, if there is still no model loaded in the mount it does not matter if the dual axis is on, right ? Or would you recommend to tie it off anyway and have it on afterwards ?

Aygen 

Le jeu. 7 avr. 2022 à 03:13, Ray Gralak <iogroups@...> a écrit :
Aygen,

Yes, leave the encoders on, but turn off dual-axis tracking if there is a model loaded for your mount.

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
> Sent: Wednesday, April 6, 2022 8:20 AM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment
>
> Hi Aygen
>
> you would leave the encoders on for polar alignment
>
> Brian
>
> On Wed, Apr 6, 2022 at 8:18 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
>
>
>       Hi Ray and astro-friends,
>
>       Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.
>
>       Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking
> while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the
> source ;(
>
>       Sorry for the silly question and thank you once again for your super kind help.
>
>       Regards,
>       Aygen
>
>
>        ual-axis absolute encoders
>
>
>
>
>
>
>
> --
>
> Brian
>
>
>
> Brian Valente
> portfolio brianvalentephotography.com  <http://brianvalentephotography.com>
>







Re: APCC position updates with manual slews

Peter Bresler
 

I do use Remote Desktop, even in proximity to the mount. The mount does move, but the diagram does not update.....only with manual use, not SGP slews, which obviously do update.


Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Ray Gralak
 

Aygen,

Yes, leave the encoders on, but turn off dual-axis tracking if there is a model loaded for your mount.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
Sent: Wednesday, April 6, 2022 8:20 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Hi Aygen

you would leave the encoders on for polar alignment

Brian

On Wed, Apr 6, 2022 at 8:18 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:


Hi Ray and astro-friends,

Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.

Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking
while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the
source ;(

Sorry for the silly question and thank you once again for your super kind help.

Regards,
Aygen


ual-axis absolute encoders







--

Brian



Brian Valente
portfolio brianvalentephotography.com <http://brianvalentephotography.com>


Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Erkaslan Aygen
 

Hi Brian,

Thank you for your swift response - much appreciated ! 

Regards,
Aygen


Re: PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

 

Hi Aygen

you would leave the encoders on for polar alignment

Brian

On Wed, Apr 6, 2022 at 8:18 AM Erkaslan Aygen <aygen.erkaslan@...> wrote:
Hi Ray and astro-friends,

Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.

Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the source ;(

Sorry for the silly question and thank you once again for your super kind help.

Regards,
Aygen


 ual-axis absolute encoders



--
Brian 



Brian Valente


PEMPRO - Polar Align for mount with dual-axis absolute encoders #Polar_Alignment

Erkaslan Aygen
 

Hi Ray and astro-friends,

Tonight, I will be polar aligning my second scope (not an AP mount ;) by using PEMPRO.

Since the mount has dual-axis absolute encoders, would you recommend to turn off the dual-axis tracking while fine-tuning the polar alignment ? I read once that you better off to turn it off but I can't find anymore the source ;(

Sorry for the silly question and thank you once again for your super kind help.

Regards,
Aygen


 ual-axis absolute encoders


Re: APCC position updates with manual slews

Ray Gralak
 

Hi Peter,

APCC does not always update the mount position moving it with the manual arrows.
Can you provide more details? APCC polls the mount's position about once per second and updates the user interface with coordinates it receives from the mount.

That said, if you were using a remote desktop application, network traffic might make button presses less responsive, so APCC may not have even received the button presses to move the mount. Also, it might be that the remote desktop application did not update APCC's user interface on the computer from which you were viewing APCC.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Peter Bresler via groups.io
Sent: Tuesday, April 5, 2022 10:19 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] APCC position updates with manual slews

APCC does not always update the mount position moving it with the manual arrows.


APCC position updates with manual slews

Peter Bresler
 

APCC does not always update the mount  position moving it with the manual arrows.


Re: A note on the video of the SGP and APCC settings for the meridian flip #APCC

Ray Gralak
 

Hi Marcelo,

 

First, you can easily avoid this by changing “Stop Tracking” to “Just Warn”.

 

More importantly, you have not defined the actual meridian limits of the telescope on your mount and set a Flip Offset.

 

-Ray

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Marcelo Figueroa via groups.io
Sent: Monday, April 4, 2022 10:31 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] A note on the video of the SGP and APCC settings for the meridian flip

 

In fact I am using the same versions of both programs as the ones used in the video.

 

Here are some screenshots that illustrate the situation:

 

Situation 1, APCC reaches the limit first, stops the mount and SGP aborts the session.

 

 

Situation 2, SGP reaches the limit first, waits for APCC and performs the flip without problems.


Re: A note on the video of the SGP and APCC settings for the meridian flip #APCC

Marcelo Figueroa
 

In fact I am using the same versions of both programs as the ones used in the video.
 
Here are some screenshots that illustrate the situation:
 
Situation 1, APCC reaches the limit first, stops the mount and SGP aborts the session.

 
 
Situation 2, SGP reaches the limit first, waits for APCC and performs the flip without problems.


Re: A note on the video of the SGP and APCC settings for the meridian flip #APCC

Marcelo Figueroa
 


This is the message displayed by SGP. 

 
Note also that when the flip arrives in SGP it will wait for APCC to reach its own limit and may reach a negative count. When APCC reaches its limit the flip will be performed without problems.


Re: AP600 vs Mach 1

weems@...
 

I tightened the foot connections and the leg pivot points on the hardwood tripod and got the tap test vibration time down to between 2.5 and 3 seconds. I also put the 600E on a Losmandy HD tripod for comparison. Slightly less amplitude vibration, with a higher frequency, which takes longer to fully dampen, but decreases to a small amplitude faster.

Practically, it was easier to focus with it on the Losmandy. The shaking isn’t as bad, and it decreases to a usable level in a second. On the AP tripod, the shaking takes more time to get to a level where it’s possible to evaluate the focus. But using a second hand to hold the focuser to steady it made it nearly as effective as the Losmandy. 

If I were doing photography with the setup, the extra weight of the Losmandy would be justified, and a pier might be even better. But for quick setup visual teaching use, the original tripod is pretty impressive. 


Chip


Re: AP900 informations

fernandorivera3
 

I think the V2 & V1 chips are for programming instructions that can be understood by encoder equipped mounts like the 1100, 1600 & 3600 mounts, which was not part of the V chip.

For the 900 <and 1200> mounts- which are "not upgradeable to encoders", the V1 or V2 chips won't impact performance- I believe. 

So upgrading the CP3 from V1 to V2 for the 900 mount shouldn't be noticeable. 

Fernando


Re: The AP YouTube Channel

 

>>>When it is mentioned, it should actually be *shown* to be already done or else it'll perplex the viewer.

Indeed, you have eagle eyes :) Again, I take this tutorial to be a general starting point, I don't know if AP was looking at this like "here's an example of excellent guiding" so much as here's the process, but point taken

>>>Yes, I agree that PHD2 calibration has to be done at the intersection of the meridian and equator to be accurate. But IMO guiding assistant should be done at the target.

Guiding assistant is to set the min moves for seeing conditions. Yes it's possible seeing conditions can change based on sky location, but at some point there's a diminishing return. You could argue we should run the guiding assistant for every target, or as conditions change during the night. Right now there isn't any software that would automate such a task, and I don't know how much added value such effort would yield.


>>>I think LP2 is for low backlash mounts and AP spring loaded worms are low backlash. 

LP2 is not specifically about low backlash, it's for stable tracking conditions that focus mainly on large scale steady drift, such as slight polar misalignment. I've seen situations where seeing conditions are poor enough that LP2 would not be good even for an encoder mount. 



On Mon, Apr 4, 2022 at 10:28 AM Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:


On Monday, April 4, 2022, 11:21:47 AM CDT, Brian Valente <bvalente@...> wrote:


Hi Cytan

just a couple thoughts regarding your comments

1. In the video during the prerequisites slide part, it mentions the mount should be polar aligned prior to using PHD 

When it is mentioned, it should actually be *shown* to be already done or else it'll perplex the viewer.


2. It's actually ideal to calibrate at the intersection of meridian and celestial equator. When using ASCOM, the mount position is reported, and PHD makes adjustments to its guiding algorithms to account for different sky positions (i.e., different targets, but also tracking through the night). That's one of the biggest benefits of ASCOM connection vs ST-4: calibrate once, use everywhere


Yes, I agree that PHD2 calibration has to be done at the intersection of the meridian and equator to be accurate. But IMO guiding assistant should be done at the target.




3. The default Dec algorithm for non-encoder mounts is Resist Switch, so I think it was roughly covered in "stay with the defaults". That being said, I think this video is more of an introductory video to get things up and running reasonably well than to cover all possible tweaks. Generally for a non-encoder mount, lowpass2 can be tricky: if you have a lot of reversals or larger excursions, the algorithm will reset its hysteresis and produce less than ideal results. Of course, ymmv. Encoder mounts should be defaulting to lowpass2 which happens when you select the encoder option during the Profile Wizard.

I think LP2 is for low backlash mounts and AP spring loaded worms are low backlash. 

Anyway, going to the algorithms page and showing the default selection and saying that the defaults are chosen on that page seems appropriate to me.

cytan





On Mon, Apr 4, 2022 at 8:05 AM Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:
Updated with a few typos corrected :)


On Monday, April 4, 2022, 10:01:36 AM CDT, Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:


Hi Karen,
   I watched the AP PHD2 video and I have some suggestions/feedback. I think the workflow shown in the video is a little strange to me because:

1. Shouldn't the video have the mount has already polar aligned to < 5 arc min? In real life, I would have done a good polar alignment before messing with PHD2 calibration because I'd have to move the mount via the knobs and that can mess up PHD2 calibration.

2. I have used of the guide assistant after I point to the target and not at the intersection of the equator and the meridian. I'm not sure that it is actually good practise to do it there because sky conditions can be different there than at the target.

3. No mention was made about the guide algorithm used. I'd assume it is "Resist Switch" in PHD2 because the video is *not* or encoder mounts. Perhaps mentioning that "LowPass2" is also a good algorithm (in fact, I think it's better than "Resist Switch") for spring loaded worms.

I hope the above helps.

cytan
  

On Monday, April 4, 2022, 09:25:35 AM CDT, Andrew J <andjones132@...> wrote:


Hi Karen.

A slight variation of the well known sentiment, "videos are worth a thousand forum posts". This forum has been and will continue to be a fantastic resource. However, authoritative video's on various maintenance and system integration topics will make the AP brand even stronger. If have already found these videos to be very helpful. For example, until I watched the SGP video I never knew that APCC automatically updated the flip offset in SGP. I always thought you had to set the two setting independently. I have already referred back to the video several times when I wasn't sure about a particular setting or couldn't remember the rational. This is and will continue to be extreamly valuable resource as new content is added. 

Off the the top of my head, here are a few more suggestions for Videos:
  • How to regrease an AP mount
  • Daytime Polar alignment for Solar
  • Best way to create/update Horizon/Meridian Limits
  • Homing/Limits vs. Horizon/Meridan Limits - avoiding conflicts
  • PEC Curve Programming using PEMPro 
  • Optimizing Polar alignment using PEMPro Polar Alignment wizard
  • Creating a APPM models for portable setup, permenant setups, domes, etc?
  • Correctly setting up dome geometry for an AP mount
Some of these are covered in detail in posts and in the documentation, but again, it is always nice to have a video reference to tie it all together. 

Thanks again for creating this new resource.

Clear Skies,
Andrew J



--
Brian 



Brian Valente



--
Brian 



Brian Valente


Re: The AP YouTube Channel

Cheng-Yang Tan
 



On Monday, April 4, 2022, 11:21:47 AM CDT, Brian Valente <bvalente@...> wrote:


Hi Cytan

just a couple thoughts regarding your comments

1. In the video during the prerequisites slide part, it mentions the mount should be polar aligned prior to using PHD 

When it is mentioned, it should actually be *shown* to be already done or else it'll perplex the viewer.


2. It's actually ideal to calibrate at the intersection of meridian and celestial equator. When using ASCOM, the mount position is reported, and PHD makes adjustments to its guiding algorithms to account for different sky positions (i.e., different targets, but also tracking through the night). That's one of the biggest benefits of ASCOM connection vs ST-4: calibrate once, use everywhere


Yes, I agree that PHD2 calibration has to be done at the intersection of the meridian and equator to be accurate. But IMO guiding assistant should be done at the target.




3. The default Dec algorithm for non-encoder mounts is Resist Switch, so I think it was roughly covered in "stay with the defaults". That being said, I think this video is more of an introductory video to get things up and running reasonably well than to cover all possible tweaks. Generally for a non-encoder mount, lowpass2 can be tricky: if you have a lot of reversals or larger excursions, the algorithm will reset its hysteresis and produce less than ideal results. Of course, ymmv. Encoder mounts should be defaulting to lowpass2 which happens when you select the encoder option during the Profile Wizard.

I think LP2 is for low backlash mounts and AP spring loaded worms are low backlash. 

Anyway, going to the algorithms page and showing the default selection and saying that the defaults are chosen on that page seems appropriate to me.

cytan





On Mon, Apr 4, 2022 at 8:05 AM Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:
Updated with a few typos corrected :)


On Monday, April 4, 2022, 10:01:36 AM CDT, Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:


Hi Karen,
   I watched the AP PHD2 video and I have some suggestions/feedback. I think the workflow shown in the video is a little strange to me because:

1. Shouldn't the video have the mount has already polar aligned to < 5 arc min? In real life, I would have done a good polar alignment before messing with PHD2 calibration because I'd have to move the mount via the knobs and that can mess up PHD2 calibration.

2. I have used of the guide assistant after I point to the target and not at the intersection of the equator and the meridian. I'm not sure that it is actually good practise to do it there because sky conditions can be different there than at the target.

3. No mention was made about the guide algorithm used. I'd assume it is "Resist Switch" in PHD2 because the video is *not* or encoder mounts. Perhaps mentioning that "LowPass2" is also a good algorithm (in fact, I think it's better than "Resist Switch") for spring loaded worms.

I hope the above helps.

cytan
  

On Monday, April 4, 2022, 09:25:35 AM CDT, Andrew J <andjones132@...> wrote:


Hi Karen.

A slight variation of the well known sentiment, "videos are worth a thousand forum posts". This forum has been and will continue to be a fantastic resource. However, authoritative video's on various maintenance and system integration topics will make the AP brand even stronger. If have already found these videos to be very helpful. For example, until I watched the SGP video I never knew that APCC automatically updated the flip offset in SGP. I always thought you had to set the two setting independently. I have already referred back to the video several times when I wasn't sure about a particular setting or couldn't remember the rational. This is and will continue to be extreamly valuable resource as new content is added. 

Off the the top of my head, here are a few more suggestions for Videos:
  • How to regrease an AP mount
  • Daytime Polar alignment for Solar
  • Best way to create/update Horizon/Meridian Limits
  • Homing/Limits vs. Horizon/Meridan Limits - avoiding conflicts
  • PEC Curve Programming using PEMPro 
  • Optimizing Polar alignment using PEMPro Polar Alignment wizard
  • Creating a APPM models for portable setup, permenant setups, domes, etc?
  • Correctly setting up dome geometry for an AP mount
Some of these are covered in detail in posts and in the documentation, but again, it is always nice to have a video reference to tie it all together. 

Thanks again for creating this new resource.

Clear Skies,
Andrew J



--
Brian 



Brian Valente


Re: The AP YouTube Channel

Cheng-Yang Tan
 

Hi Wade,

It's just disconcerting to me that the PA error was this big in the video, and IMO is a distraction.

cytan

On Monday, April 4, 2022, 11:07:45 AM CDT, W Hilmo <y.groups@...> wrote:


Regarding the first point, guider calibration consists of two parts:  Determining the rotation angle of the camera and determining the movement rate during guide commands.

Neither of these would be affected by minor changes to polar alignment, at least not enough to make any difference.

That said, yeah, polar aligning the mount is something that I do right away after setting it up, so my normal workflow would have it done by the time I start the guide software.  But I doubt that it actually matters.

-Wade

On 4/4/22 8:05 AM, Cheng-Yang Tan via groups.io wrote:
Updated with a few typos corrected :)


On Monday, April 4, 2022, 10:01:36 AM CDT, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


Hi Karen,
   I watched the AP PHD2 video and I have some suggestions/feedback. I think the workflow shown in the video is a little strange to me because:

1. Shouldn't the video have the mount has already polar aligned to < 5 arc min? In real life, I would have done a good polar alignment before messing with PHD2 calibration because I'd have to move the mount via the knobs and that can mess up PHD2 calibration.

2. I have used of the guide assistant after I point to the target and not at the intersection of the equator and the meridian. I'm not sure that it is actually good practise to do it there because sky conditions can be different there than at the target.

3. No mention was made about the guide algorithm used. I'd assume it is "Resist Switch" in PHD2 because the video is *not* or encoder mounts. Perhaps mentioning that "LowPass2" is also a good algorithm (in fact, I think it's better than "Resist Switch") for spring loaded worms.

I hope the above helps.

cytan
  

On Monday, April 4, 2022, 09:25:35 AM CDT, Andrew J <andjones132@...> wrote:


Hi Karen.

A slight variation of the well known sentiment, "videos are worth a thousand forum posts". This forum has been and will continue to be a fantastic resource. However, authoritative video's on various maintenance and system integration topics will make the AP brand even stronger. If have already found these videos to be very helpful. For example, until I watched the SGP video I never knew that APCC automatically updated the flip offset in SGP. I always thought you had to set the two setting independently. I have already referred back to the video several times when I wasn't sure about a particular setting or couldn't remember the rational. This is and will continue to be extreamly valuable resource as new content is added. 

Off the the top of my head, here are a few more suggestions for Videos:
  • How to regrease an AP mount
  • Daytime Polar alignment for Solar
  • Best way to create/update Horizon/Meridian Limits
  • Homing/Limits vs. Horizon/Meridan Limits - avoiding conflicts
  • PEC Curve Programming using PEMPro 
  • Optimizing Polar alignment using PEMPro Polar Alignment wizard
  • Creating a APPM models for portable setup, permenant setups, domes, etc?
  • Correctly setting up dome geometry for an AP mount
Some of these are covered in detail in posts and in the documentation, but again, it is always nice to have a video reference to tie it all together. 

Thanks again for creating this new resource.

Clear Skies,
Andrew J


Re: The AP YouTube Channel

 

Hi Cytan

just a couple thoughts regarding your comments

1. In the video during the prerequisites slide part, it mentions the mount should be polar aligned prior to using PHD 

2. It's actually ideal to calibrate at the intersection of meridian and celestial equator. When using ASCOM, the mount position is reported, and PHD makes adjustments to its guiding algorithms to account for different sky positions (i.e., different targets, but also tracking through the night). That's one of the biggest benefits of ASCOM connection vs ST-4: calibrate once, use everywhere

3. The default Dec algorithm for non-encoder mounts is Resist Switch, so I think it was roughly covered in "stay with the defaults". That being said, I think this video is more of an introductory video to get things up and running reasonably well than to cover all possible tweaks. Generally for a non-encoder mount, lowpass2 can be tricky: if you have a lot of reversals or larger excursions, the algorithm will reset its hysteresis and produce less than ideal results. Of course, ymmv. Encoder mounts should be defaulting to lowpass2 which happens when you select the encoder option during the Profile Wizard.



It sounds

On Mon, Apr 4, 2022 at 8:05 AM Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:
Updated with a few typos corrected :)


On Monday, April 4, 2022, 10:01:36 AM CDT, Cheng-Yang Tan via groups.io <cytan299=yahoo.com@groups.io> wrote:


Hi Karen,
   I watched the AP PHD2 video and I have some suggestions/feedback. I think the workflow shown in the video is a little strange to me because:

1. Shouldn't the video have the mount has already polar aligned to < 5 arc min? In real life, I would have done a good polar alignment before messing with PHD2 calibration because I'd have to move the mount via the knobs and that can mess up PHD2 calibration.

2. I have used of the guide assistant after I point to the target and not at the intersection of the equator and the meridian. I'm not sure that it is actually good practise to do it there because sky conditions can be different there than at the target.

3. No mention was made about the guide algorithm used. I'd assume it is "Resist Switch" in PHD2 because the video is *not* or encoder mounts. Perhaps mentioning that "LowPass2" is also a good algorithm (in fact, I think it's better than "Resist Switch") for spring loaded worms.

I hope the above helps.

cytan
  

On Monday, April 4, 2022, 09:25:35 AM CDT, Andrew J <andjones132@...> wrote:


Hi Karen.

A slight variation of the well known sentiment, "videos are worth a thousand forum posts". This forum has been and will continue to be a fantastic resource. However, authoritative video's on various maintenance and system integration topics will make the AP brand even stronger. If have already found these videos to be very helpful. For example, until I watched the SGP video I never knew that APCC automatically updated the flip offset in SGP. I always thought you had to set the two setting independently. I have already referred back to the video several times when I wasn't sure about a particular setting or couldn't remember the rational. This is and will continue to be extreamly valuable resource as new content is added. 

Off the the top of my head, here are a few more suggestions for Videos:
  • How to regrease an AP mount
  • Daytime Polar alignment for Solar
  • Best way to create/update Horizon/Meridian Limits
  • Homing/Limits vs. Horizon/Meridan Limits - avoiding conflicts
  • PEC Curve Programming using PEMPro 
  • Optimizing Polar alignment using PEMPro Polar Alignment wizard
  • Creating a APPM models for portable setup, permenant setups, domes, etc?
  • Correctly setting up dome geometry for an AP mount
Some of these are covered in detail in posts and in the documentation, but again, it is always nice to have a video reference to tie it all together. 

Thanks again for creating this new resource.

Clear Skies,
Andrew J



--
Brian 



Brian Valente


Re: The AP YouTube Channel

W Hilmo
 

Regarding the first point, guider calibration consists of two parts:  Determining the rotation angle of the camera and determining the movement rate during guide commands.

Neither of these would be affected by minor changes to polar alignment, at least not enough to make any difference.

That said, yeah, polar aligning the mount is something that I do right away after setting it up, so my normal workflow would have it done by the time I start the guide software.  But I doubt that it actually matters.

-Wade

On 4/4/22 8:05 AM, Cheng-Yang Tan via groups.io wrote:
Updated with a few typos corrected :)


On Monday, April 4, 2022, 10:01:36 AM CDT, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


Hi Karen,
   I watched the AP PHD2 video and I have some suggestions/feedback. I think the workflow shown in the video is a little strange to me because:

1. Shouldn't the video have the mount has already polar aligned to < 5 arc min? In real life, I would have done a good polar alignment before messing with PHD2 calibration because I'd have to move the mount via the knobs and that can mess up PHD2 calibration.

2. I have used of the guide assistant after I point to the target and not at the intersection of the equator and the meridian. I'm not sure that it is actually good practise to do it there because sky conditions can be different there than at the target.

3. No mention was made about the guide algorithm used. I'd assume it is "Resist Switch" in PHD2 because the video is *not* or encoder mounts. Perhaps mentioning that "LowPass2" is also a good algorithm (in fact, I think it's better than "Resist Switch") for spring loaded worms.

I hope the above helps.

cytan
  

On Monday, April 4, 2022, 09:25:35 AM CDT, Andrew J <andjones132@...> wrote:


Hi Karen.

A slight variation of the well known sentiment, "videos are worth a thousand forum posts". This forum has been and will continue to be a fantastic resource. However, authoritative video's on various maintenance and system integration topics will make the AP brand even stronger. If have already found these videos to be very helpful. For example, until I watched the SGP video I never knew that APCC automatically updated the flip offset in SGP. I always thought you had to set the two setting independently. I have already referred back to the video several times when I wasn't sure about a particular setting or couldn't remember the rational. This is and will continue to be extreamly valuable resource as new content is added. 

Off the the top of my head, here are a few more suggestions for Videos:
  • How to regrease an AP mount
  • Daytime Polar alignment for Solar
  • Best way to create/update Horizon/Meridian Limits
  • Homing/Limits vs. Horizon/Meridan Limits - avoiding conflicts
  • PEC Curve Programming using PEMPro 
  • Optimizing Polar alignment using PEMPro Polar Alignment wizard
  • Creating a APPM models for portable setup, permenant setups, domes, etc?
  • Correctly setting up dome geometry for an AP mount
Some of these are covered in detail in posts and in the documentation, but again, it is always nice to have a video reference to tie it all together. 

Thanks again for creating this new resource.

Clear Skies,
Andrew J

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