Date   

Re: RA Mesh adjustment for 2104 model Mach 1 GTO

ap@CaptivePhotons.com
 
Edited

Nicholas wrote:

 

  • yes last night that is what I had done was uncheck guide mount output in the guide screen in the brain function.  I also recalibrate by using the auto restore calibration in the same screen.

 

If you are having any issues at all with PHD2, slew high and near DEC 0 (for higher latitudes kind of split the difference to stay high) and calibrate each time.  It takes almost no time.  "Restore calibration" has screwed up way too many people.  It works for observatories with fixed everything of course, but it is SOOOO easy to forget to calibrate after changes and end up with mystery problems.  It will also clue you into new problems, like inadequate corrections from something slipping.

 

Run Guiding Assistant not turning off guiding, as then it does an analysis for you of a lot of considerations.

 

Really, it's best not to over think all this, the PHD2 guys have refined the simpler aspects of this over time.  Following their path will usually get you close.

 

I'm running roughly with guide assistant recommendations now, and guiding at about 0.21" at 540mm on an AP1100, or 0.10 pixels.  I love this mount, it just works.

 

Linwood

 

 


Re: Fine tuning PHD2 settings for 1100 with Encoders #Guiding

Roland Christen
 

Just a few minutes is all I need.

Roland

-----Original Message-----
From: Andrew J <andjones132@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 5:49 pm
Subject: Re: [ap-gto] Fine tuning PHD2 settings for 1100 with Encoders #Guiding

Thanks Roland. As soon as I get clear skies again I will post a screen shot of the unguided tracking graph. 

Andrew

--
Roland Christen
Astro-Physics


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

steve.winston@...
 

On Mon, Oct 11, 2021 at 05:17 PM, nicholas wrote:
yes last night that is what I had done was uncheck guide mount output in the guide screen in the brain function.  I also recalibrate by using the auto restore calibration in the same screen
Both of the logs you posted on the CN thread showed actual GA runs (it shows the GA findings in the logs at the end of the run).   Did you also disable guiding in the brain?  Did you reenable it later?

And enabling auto-restore of calibration is NOT the same as recalibrating, in fact it's basically the opposite :).   Again the logs you posted over on CN show the you did in fact do multiple calibration runs and are not just using the auto restore option (which reloads your previous calibration data and so is not the same as recalibrating).

So neither of the above statements match what was in the logs :-/


Re: Mach2 with TEC180 for visual

Roland Christen
 

Nice collection of scopes and mount.

Having a strong steel pier is of course the ultimate for stability. The ATS portable piers are probably the most solid piers you can get next to steel or concrete. I have one in our Hawaii observatory and will be installing a second one shortly.

Rolando

-----Original Message-----
From: Jeff B <mnebula946@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 6:12 pm
Subject: Re: [ap-gto] Mach2 with TEC180 for visual

For a bit of perspective, I have had several AP mount and refractor combinations that have worked just fine for visual use.  By "fine" I mean the ability to easily and accurately focus at high power without a lot of juggling in the image (interestingly, a small bit of slow back and forth in the image actually seems to make accurate focusing easier for me at times).

My Mach 1 with a Losmandy HD tripod was "good" with my old AP 178 F9, which is rather light weight for its aperture but a long moment arm.

My AP1100 with the HD tripod was a "very good" support for the 178 F9 but "ok to good"  with the TEC 200ED (F9, and about 63 pounds fully configured with dovetail, aft ring with 60mm F8 finder, counterpoise weight system and bino-viewers)

My AP900 was VG to excellent supporting 178 F9 and G to VG with the 200ED (actually, I was very impressed at how well it handled the scope).  But this was with the AP900 installed on a fabricated steel pier, filled with sand and bolted to a concrete pad. 

My AP1200 is just flat out excellent with the TEC 200ED.  Sure, if I bump it hard enough it will go through a couple of highly damped  cycles, but its system "Q" factor is of such high quality, there is NO vibration when focusing even up to 500X.  And honestly, it is the most satisfying visual scope/mount system I have ever used.  It too is bolted down with the steel pier.

Our County Parks Department's observatory has a 220 F12 achromat riding on another AP1200 (again bolted to a sand filled steel pier).  The OTA with all accessories and bino-viewer, tips the scales at 80 pounds and is a solid VG to E.

Now my experience has also been that for portable setups, the tripod and its coupling to the ground is at least as important as the mount itself when it comes to vibration.

I have attached some pictures of some of these examples.

Jeff

On Mon, Oct 11, 2021 at 5:33 PM fernandorivera3 via groups.io <fernandorivera3=yahoo.com@groups.io> wrote:
The 1100 GTO would be a better option than the Mach 2 for the TEC 180 FL

Fernando


--
Roland Christen
Astro-Physics


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

nicholas
 

yes last night they were set to zero. 


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

nicholas
 

yes last night that is what I had done was uncheck guide mount output in the guide screen in the brain function.  I also recalibrate by using the auto restore calibration in the same screen.


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

W Hilmo
 

There are several ways to disable guiding.

I posted the steps that I did because I want to be consistent with Roland's messaging.

As for how MnMo works, it essentially ignores any positional error in the guide star that exceeds the number of pixels specified.  If the guide star moves more than 20 pixels after a 1 second guide exposure, then I doubt that the result would be useful anyway.  If that happens, then we'll have to figure out what's happening and how to deal with it.

I do have one other thought, though.  I know that Nicholas has been testing with non-zero time lapse values in the camera tab.  It's probably best to set that back to zero for this test.

-Wade

On 10/11/21 4:43 PM, Peter Nagy wrote:
Configure PHD2 to use your main camera through the refractor and make sure that it is set for single star guiding (the "use multiple stars" checkbox must be unchecked). 
Well, after GA is done, won't Nicholas have to translate to appropriate MnMo settings for guide scope. I believe his guide scope is 160mm to 165mm  focal length. I know how to translate but can Nicholas? 

set MnMo to 20.00
I think it would be best to uncheck the checkbox for "Enable mount guide output" under Guiding tab. But if running GA, guide output correction is automatically disabled. 

Peter


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Peter Nagy
 

Configure PHD2 to use your main camera through the refractor and make sure that it is set for single star guiding (the "use multiple stars" checkbox must be unchecked). 
Well, after GA is done, won't Nicholas have to translate to appropriate MnMo settings for guide scope. I believe his guide scope is 160mm to 165mm  focal length. I know how to translate but can Nicholas? 

set MnMo to 20.00
I think it would be best to uncheck the checkbox for "Enable mount guide output" under Guiding tab. But if running GA, guide output correction is automatically disabled. 

Peter


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

nicholas
 

thank all so much. 
I have a lot to work with here and can thus refine the testing procedures to make it usable for analyses. 


Re: Mach2 with TEC180 for visual

dvjbaja
 

My experience with the Losmandy HD, folding tripod has been mixed.  Much depends on the surface it resides.  My own thoughts on mounts:

AP 180 f/7 on the 1200 mount was rock solid.  48" x 10" AP pier. Overall I would say the 1200 was the best mount I've ever owned. 

The same scope on the new 1100 and Losmandy HD folding tripod is only fair.. I would say that the limt of the mount/tripod combination was reached.   Lots of high frequency vibration that takes about 1.5" to 2" to settle. 

A friends 155 f/7 on his 900 mount and 52" pier is very solid, vibration free.  These are really good mounts. 

My 10" Mak Cass on the 1100 with Losmandy HD tripod (fully lowered), experiences some minor, slow vibration during focusing.  But this seems to change if I am on a cement surface, or dirt surface.  Dirt is worse. 

Long moment arm tubes are just hard to dampen, but a solid pier footing would really seem to help in a perminent location. 








Re: Mach2 with TEC180 for visual

Jeff B
 

For a bit of perspective, I have had several AP mount and refractor combinations that have worked just fine for visual use.  By "fine" I mean the ability to easily and accurately focus at high power without a lot of juggling in the image (interestingly, a small bit of slow back and forth in the image actually seems to make accurate focusing easier for me at times).

My Mach 1 with a Losmandy HD tripod was "good" with my old AP 178 F9, which is rather light weight for its aperture but a long moment arm.

My AP1100 with the HD tripod was a "very good" support for the 178 F9 but "ok to good"  with the TEC 200ED (F9, and about 63 pounds fully configured with dovetail, aft ring with 60mm F8 finder, counterpoise weight system and bino-viewers)

My AP900 was VG to excellent supporting 178 F9 and G to VG with the 200ED (actually, I was very impressed at how well it handled the scope).  But this was with the AP900 installed on a fabricated steel pier, filled with sand and bolted to a concrete pad. 

My AP1200 is just flat out excellent with the TEC 200ED.  Sure, if I bump it hard enough it will go through a couple of highly damped  cycles, but its system "Q" factor is of such high quality, there is NO vibration when focusing even up to 500X.  And honestly, it is the most satisfying visual scope/mount system I have ever used.  It too is bolted down with the steel pier.

Our County Parks Department's observatory has a 220 F12 achromat riding on another AP1200 (again bolted to a sand filled steel pier).  The OTA with all accessories and bino-viewer, tips the scales at 80 pounds and is a solid VG to E.

Now my experience has also been that for portable setups, the tripod and its coupling to the ground is at least as important as the mount itself when it comes to vibration.

I have attached some pictures of some of these examples.

Jeff

On Mon, Oct 11, 2021 at 5:33 PM fernandorivera3 via groups.io <fernandorivera3=yahoo.com@groups.io> wrote:
The 1100 GTO would be a better option than the Mach 2 for the TEC 180 FL

Fernando


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

steve.winston@...
 

On Mon, Oct 11, 2021 at 03:12 PM, W Hilmo wrote:
stop guiding and set MnMo to 20.00 (you will need to set it in two places, one for each axis).
This obviously doesn't disable guiding, and if there is a spike movement greater than 20 pixels, or the guide star drifts more than 20 pixels during the test then PHD2 will still issue a guide correction.

The easiest way to get the requested data with guiding fully disabled is to just run GA, as Roland suggested earlier in this thread.   It also means that he can ruin the DEC backlash test at the same time and grab those screen shots too.


Re: Fine tuning PHD2 settings for 1100 with Encoders #Guiding

Andrew J
 

Thanks Roland. As soon as I get clear skies again I will post a screen shot of the unguided tracking graph. 

Andrew


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Roland Christen
 

Sounds perfect!

And if he can post the Dec backlash graph, it would further illuminate things.

Rolando

-----Original Message-----
From: W Hilmo <y.groups@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 5:11 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Hi Nicholas,

I just took a look at the weather for the San Diego area, and it looks like the next 5 or 6 nights will be good for doing this test.

Here is my suggestion:

Set up with either of your refractors.  Configure PHD2 to use your main camera through the refractor and make sure that it is set for single star guiding (the "use multiple stars" checkbox must be unchecked).  Set the exposure time to 1 second.  Point the scope at the star Alshain in the constellation Aquila.  It's about 6 degrees north of the celestial equator and is a very easy to find, naked eye star that is a bit south of Altair.  For that matter, Altair itself is only about 8.5 degrees from the celestial equator, but is so bright that 1 second exposures will probably saturate it.  In a pinch, you could try Altair instead, but I prefer non-saturated stars, so you'd need an even shorter guide exposure.

Once you have Alshain centered in the field of view, click on it in PHD2 and then hold the shift key down on your keyboard and click the "start tracking" icon.  This will force a calibration.  Once the calibration is complete, stop guiding and set MnMo to 20.00 (you will need to set it in two places, one for each axis).  Click the "clear" button on the graph and then click the "start tracking" icon (without holding the shift key down).  This will start tracking and begin building the graph that Roland wants to see.

Let it run for 20 minutes.

I believe that this will get you the information that Roland needs to see.

I hope that this helps,
-Wade (wadeh237 from Cloudy Nights)



On 10/11/21 1:49 PM, Roland Christen via groups.io wrote:
That one is no better. Unfortunately it is cross contaminated. The RA should show the PE and the Dec should show only drift with no PE. It appears that the calibration is off by 45 degrees.

It may not even be calibrated at the celestial equator, so it's not going to be accurate for RA.

Rolando



-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:36 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

I found an earlier run that looks better:

image.png
image.png

The previous run was unguided data

There were significant number of failed calibration attempts

Not sure what's going on with the previous graph and so many difficulties with calibration. It may be that you have a cable or connection loose somewhere



On Mon, Oct 11, 2021 at 1:30 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
I'm afraid that is useless data.

Guide graphs ideally should be taken thru the main scope on ONE reasonably bright star at or near the celestial equator, at or near the meridian (either side will do). One star, not multi-star tracking!

What he captured here appears to be a mix of hot pixel tracking along with some periods of actual multi-star tracking.

Rolando

-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:14 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Here's the picture from those logs - unguided output with 2 second exposures, approx 20 minutes total time



image.png

On Mon, Oct 11, 2021 at 12:59 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Guide logs are great for Geeks that like to wade thru long log files. I'm not one of them.

In order to evaluate the health of your mount I would like to see the following done as I asked before: a simple guide graph screen shot.

1) Take a 15 - 20 minute guide graph with guide exposure set to 1 second on a reasonably right star (forget multi-star guiding, it's not important for this mount health test)
2) for the entirety of the test have guide corrections turned OFF

Easiest way to turn off guide corrections is to set MinMove to 20.0 for both axes. Another way is to go into your guide setup and uncheck the guide corrections box for RA and Dec.

The screen shot should show both the drift of both axes as well as the shape of the RA periodic error for the entire 15 - 20 minute period. It will be a clean image of only the mount with none of the interference of any outside software.

Once I get that screen shot from you I can evaluate the state of the mount, whether the bearings are smooth or not and lots of other things that may or may not need some care or adjustment. Until i see that, we cannot do much here but watch and wait. I have only a few more days here at AP, after which I will be gone on an extended trip and won't be able to advise you until I get back the first week of November.

Rolando

-----Original Message-----
From: nicholas via groups.io <chironik=yahoo.com@groups.io>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 2:24 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Hello Mr. Christen.

Firstly I want to express my sincere gratitude for offering to evaluate my Phd2 log data in light of how busy you must already be.   I am not convinced that any issues are not operational efficiency, for example, I likely could improve on my guide-scope/ guide cam structure to make it more solid. On the saddle was a 152mm F8 refractor triplet with a few LBS of imaging related equipment.

Attached is Phd2 log from last night. @ 23:48 I began a recalibration, then I proceeded with the guide assist on after having skewed from the handbox from Park 3 to NGC 7541.
Thank you!

https://openphdguidi...2_logs_Yrrd.zip

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics
Attachments:


--
Roland Christen
Astro-Physics


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

W Hilmo
 

Hi Nicholas,

I just took a look at the weather for the San Diego area, and it looks like the next 5 or 6 nights will be good for doing this test.

Here is my suggestion:

Set up with either of your refractors.  Configure PHD2 to use your main camera through the refractor and make sure that it is set for single star guiding (the "use multiple stars" checkbox must be unchecked).  Set the exposure time to 1 second.  Point the scope at the star Alshain in the constellation Aquila.  It's about 6 degrees north of the celestial equator and is a very easy to find, naked eye star that is a bit south of Altair.  For that matter, Altair itself is only about 8.5 degrees from the celestial equator, but is so bright that 1 second exposures will probably saturate it.  In a pinch, you could try Altair instead, but I prefer non-saturated stars, so you'd need an even shorter guide exposure.

Once you have Alshain centered in the field of view, click on it in PHD2 and then hold the shift key down on your keyboard and click the "start tracking" icon.  This will force a calibration.  Once the calibration is complete, stop guiding and set MnMo to 20.00 (you will need to set it in two places, one for each axis).  Click the "clear" button on the graph and then click the "start tracking" icon (without holding the shift key down).  This will start tracking and begin building the graph that Roland wants to see.

Let it run for 20 minutes.

I believe that this will get you the information that Roland needs to see.

I hope that this helps,
-Wade (wadeh237 from Cloudy Nights)



On 10/11/21 1:49 PM, Roland Christen via groups.io wrote:
That one is no better. Unfortunately it is cross contaminated. The RA should show the PE and the Dec should show only drift with no PE. It appears that the calibration is off by 45 degrees.

It may not even be calibrated at the celestial equator, so it's not going to be accurate for RA.

Rolando



-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:36 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

I found an earlier run that looks better:




The previous run was unguided data

There were significant number of failed calibration attempts

Not sure what's going on with the previous graph and so many difficulties with calibration. It may be that you have a cable or connection loose somewhere



On Mon, Oct 11, 2021 at 1:30 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
I'm afraid that is useless data.

Guide graphs ideally should be taken thru the main scope on ONE reasonably bright star at or near the celestial equator, at or near the meridian (either side will do). One star, not multi-star tracking!

What he captured here appears to be a mix of hot pixel tracking along with some periods of actual multi-star tracking.

Rolando

-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:14 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Here's the picture from those logs - unguided output with 2 second exposures, approx 20 minutes total time





On Mon, Oct 11, 2021 at 12:59 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Guide logs are great for Geeks that like to wade thru long log files. I'm not one of them.

In order to evaluate the health of your mount I would like to see the following done as I asked before: a simple guide graph screen shot.

1) Take a 15 - 20 minute guide graph with guide exposure set to 1 second on a reasonably right star (forget multi-star guiding, it's not important for this mount health test)
2) for the entirety of the test have guide corrections turned OFF

Easiest way to turn off guide corrections is to set MinMove to 20.0 for both axes. Another way is to go into your guide setup and uncheck the guide corrections box for RA and Dec.

The screen shot should show both the drift of both axes as well as the shape of the RA periodic error for the entire 15 - 20 minute period. It will be a clean image of only the mount with none of the interference of any outside software.

Once I get that screen shot from you I can evaluate the state of the mount, whether the bearings are smooth or not and lots of other things that may or may not need some care or adjustment. Until i see that, we cannot do much here but watch and wait. I have only a few more days here at AP, after which I will be gone on an extended trip and won't be able to advise you until I get back the first week of November.

Rolando

-----Original Message-----
From: nicholas via groups.io <chironik=yahoo.com@groups.io>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 2:24 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Hello Mr. Christen.

Firstly I want to express my sincere gratitude for offering to evaluate my Phd2 log data in light of how busy you must already be.   I am not convinced that any issues are not operational efficiency, for example, I likely could improve on my guide-scope/ guide cam structure to make it more solid. On the saddle was a 152mm F8 refractor triplet with a few LBS of imaging related equipment.

Attached is Phd2 log from last night. @ 23:48 I began a recalibration, then I proceeded with the guide assist on after having skewed from the handbox from Park 3 to NGC 7541.
Thank you!

https://openphdguidi...2_logs_Yrrd.zip

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics

Attachments:



Re: Mach2 with TEC180 for visual

fernandorivera3
 

The 1100 GTO would be a better option than the Mach 2 for the TEC 180 FL

Fernando


Re: Mach2 with TEC180 for visual

fernandorivera3
 

Weight of the tube is OK but the main concern is moment arm & will the scope be exposed to breezy conditions along with careful balancing. 

Fernando


Re: Two videos about the AP 175 F/8 refractor

fernandorivera3
 

Nope. The beige color of the cover is on the OUTSIDE & the silver color is on the INSIDE. If you do it the other way around especially repeatedly you will destroy the inner protection provided by the cover.
The cheaper covers out there I think have the silver on the OUTSIDE & a medium green color on the INSIDE. 

Fernando


Re: Smart Meridian Flip with NINA #APCC

Joseph Beyer
 

Hi Andrew,

Thanks for the insight.  I agree, the software has a lot of potential.  My needs are definitely simpler than yours!  Software that simplifies a number of routines the way the advanced sequencer does in a real plus.  That said when I've had problems come up mid sequence it's not straight forward to shut things down then do a simple restart.  Probably just a matter of time though.

Joe


Re: RA Mesh adjustment for 2104 model Mach 1 GTO

Roland Christen
 

That one is no better. Unfortunately it is cross contaminated. The RA should show the PE and the Dec should show only drift with no PE. It appears that the calibration is off by 45 degrees.

It may not even be calibrated at the celestial equator, so it's not going to be accurate for RA.

Rolando



-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:36 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

I found an earlier run that looks better:

image.png
image.png

The previous run was unguided data

There were significant number of failed calibration attempts

Not sure what's going on with the previous graph and so many difficulties with calibration. It may be that you have a cable or connection loose somewhere



On Mon, Oct 11, 2021 at 1:30 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
I'm afraid that is useless data.

Guide graphs ideally should be taken thru the main scope on ONE reasonably bright star at or near the celestial equator, at or near the meridian (either side will do). One star, not multi-star tracking!

What he captured here appears to be a mix of hot pixel tracking along with some periods of actual multi-star tracking.

Rolando

-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 3:14 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Here's the picture from those logs - unguided output with 2 second exposures, approx 20 minutes total time



image.png

On Mon, Oct 11, 2021 at 12:59 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
Guide logs are great for Geeks that like to wade thru long log files. I'm not one of them.

In order to evaluate the health of your mount I would like to see the following done as I asked before: a simple guide graph screen shot.

1) Take a 15 - 20 minute guide graph with guide exposure set to 1 second on a reasonably right star (forget multi-star guiding, it's not important for this mount health test)
2) for the entirety of the test have guide corrections turned OFF

Easiest way to turn off guide corrections is to set MinMove to 20.0 for both axes. Another way is to go into your guide setup and uncheck the guide corrections box for RA and Dec.

The screen shot should show both the drift of both axes as well as the shape of the RA periodic error for the entire 15 - 20 minute period. It will be a clean image of only the mount with none of the interference of any outside software.

Once I get that screen shot from you I can evaluate the state of the mount, whether the bearings are smooth or not and lots of other things that may or may not need some care or adjustment. Until i see that, we cannot do much here but watch and wait. I have only a few more days here at AP, after which I will be gone on an extended trip and won't be able to advise you until I get back the first week of November.

Rolando

-----Original Message-----
From: nicholas via groups.io <chironik=yahoo.com@groups.io>
To: main@ap-gto.groups.io
Sent: Mon, Oct 11, 2021 2:24 pm
Subject: Re: [ap-gto] RA Mesh adjustment for 2104 model Mach 1 GTO

Hello Mr. Christen.

Firstly I want to express my sincere gratitude for offering to evaluate my Phd2 log data in light of how busy you must already be.   I am not convinced that any issues are not operational efficiency, for example, I likely could improve on my guide-scope/ guide cam structure to make it more solid. On the saddle was a 152mm F8 refractor triplet with a few LBS of imaging related equipment.

Attached is Phd2 log from last night. @ 23:48 I began a recalibration, then I proceeded with the guide assist on after having skewed from the handbox from Park 3 to NGC 7541.
Thank you!

https://openphdguidi...2_logs_Yrrd.zip

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics


--
Brian 



Brian Valente

--
Roland Christen
Astro-Physics

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