Date   

Re: GTOCP4 Caps

M Hambrick
 

Those caps can be purchased from Mouser, but the last time I checked they were out of stock for one of them, I can't remember which.

What about the threaded connectors on the mount gearboxes ? Does anyone know what size and type those are ?

Mike


Re: More APPM Results -- Can Someone Help Me Understand This?

mjb87@...
 

Thanks, Ray. I'll look into UCAC4. I will also reconfirm that the mount is well balanced, check orthogonality and reconfirm clutches are tight. (They appeared to be tight last night.)  I'm also getting a mono camera with larger pixels (5.86 vs. 3.8) which should make things slightly easier and more straightforward when setting pixel size. Next clear night I'll run some tests, if I can get solutions, on 1x1 binning to see what APPM reports as image scale.

BTW, one of the great features of APPM is the ability to a file of saved failed images from the comfort of home the next day. It allows me to tweak settings for maximum probability of getting solutions. Very nice.

Marty


Re: Thanks to AP stuff

Jan Soldan
 

George,
I just sent answer to Roland's answer, so if you have and advice what I could check/test/etc., please let me know. My short video should be at support@....
Thank you,
Jan


Re: Thanks to AP stuff

Jan Soldan
 

Roland,
I sent a short video to support@... showing how my DEC motor badly works. I tried a new CP4 and it works a bit differently than CP3. Now, RA motor moves as expected, no problems with W-E buttons, no yellow light even if DEC motor is connected.
But when I press S or N button and even hold it, DEC motor starts moving in proper direction but only for 1-2 seconds, then stops and yellow light is seen, RA is still OK, can rotate around polar axis, but DEC works only for 1-2 sec. It is always repeatable this way.
So, you was right that probably DEC motor/encoder is bad. I do not know if only encoder should be replaced with a new one and/or also motor needs to be exchanged.
Please advice,
Thank you,
Jan
 
 


Re: GTOCP4 Caps

Roger Howard
 

Perfect, thanks.


Re: GTOCP4 Caps

Harley Davidson
 

On 4/20/2021 7:52 PM, Roger Howard wrote:

[Edited Message Follows]

I’m curious if anyone knows the sizes or if any AP personnel would post the sizes of the connectors used on the control box.  We use these in aviation to cover unused connectors, and I think I would like to try a few since the plastic ones don’t really stay in place.  The sizes listed on shopping sites are gibberish and mean nothing that I can discern.  Or does anyone have a good cap, or covers, they have found that work well.  I move my mount each time I set up and they tend to pop off.

CS

Roger



Re: More APPM Results -- Can Someone Help Me Understand This?

Ray Gralak
 

BTW, at that image scale you should probably by using the UCAC4 catalog, if your plate solver can use it.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of mjb87 via groups.io
Sent: Tuesday, April 20, 2021 6:55 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?

Running an APPM session with a f/10 (native f/15 with 0.67 focal reducer) Cassegrain on an 1100 using an
ASI1600MC-Cool. Image scale is 0.26 but because this is a OSC at Ray's suggestion I used 0.52 for both X
and Y scale. Other settings were generally standard except the max catalog magnitude was reduced to 12.
(This seems to avoid a lot of checkpoint timing errors.) This was during a half-moon almost directly overhead.
Not ideal conditions. A bit of wind. I can't figure out how to manually set temperature, pressure and humidity so
the default of 10 was used when it was closer to 18.

The run on the east side made sense. Most errors with a couple of dozen arcminutes.



Things went crazy on the west side, reporting pointing errors of 10 or 15 degrees!



I installed this model and then pointed in the west and did a plate-solve and recal and got an error telling me
the platesolve-based correction of 15 degrees was more than the maximum allowed. So something is wrong
here.

The physical setup of the telescope on the mount seems appropriate -- for sure no 15 degree misalignment in
orthogonality. The primary mirror is fixed. Collimation is good -- checked a week ago. The polar alignment is
good -- ran a session with Polemaster yesterday and checked with RAPAS today.

Am I missing something obvious here?

Marty


Re: More APPM Results -- Can Someone Help Me Understand This?

Ray Gralak
 

Hi Marty,

 

> Running an APPM session with a f/10 (native f/15 with 0.67 focal reducer) Cassegrain on an 1100 using an

> ASI1600MC-Cool. Image scale is 0.26 but because this is a OSC at Ray's suggestion I used 0.52 for both X and Y

> scale.

 

Actually, it was my suggestion based on what you described. I’m not sure it was a correct suggestion. J

 

With APPM’s camera settings set to 1x binning, what image scale does a plate solve return when you click the “Plate Solve” button on APPM’s setup tab? That’s the value you should enter for x and Y scale on APPM’s “Plate Solve Settings” tab.

 

> Things went crazy on the west side, reporting pointing errors of 10 or 15 degrees!

 

Maybe the RA clutch is slipping?

 

> I can't figure out how to manually set temperature, pressure and humidity so the default of 10 was used

> when it was closer to 18.

 

You can manually set Temperature and Pressure in APCC as in this screen shot:

 

 

You cannot set humidity manually, but it has very little effect on the refraction calculation.

 

-Ray

 

 

> -----Original Message-----

> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of mjb87 via groups.io

> Sent: Tuesday, April 20, 2021 6:55 PM

> To: main@ap-gto.groups.io

> Subject: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?

>

> Running an APPM session with a f/10 (native f/15 with 0.67 focal reducer) Cassegrain on an 1100 using an

> ASI1600MC-Cool. Image scale is 0.26 but because this is a OSC at Ray's suggestion I used 0.52 for both X and Y

> scale. Other settings were generally standard except the max catalog magnitude was reduced to 12. (This seems to

> avoid a lot of checkpoint timing errors.)  This was during a half-moon almost directly overhead. Not ideal conditions. A

> bit of wind. I can't figure out how to manually set temperature, pressure and humidity so the default of 10 was used

> when it was closer to 18.

>

> The run on the east side made sense. Most errors with a couple of dozen arcminutes.

>

>

>

> Things went crazy on the west side, reporting pointing errors of 10 or 15 degrees!

>

>

>

> I installed this model and then pointed in the west and did a plate-solve and recal and got an error telling me the

> platesolve-based correction of 15 degrees was more than the maximum allowed. So something is wrong here.

>

> The physical setup of the telescope on the mount seems appropriate -- for sure no 15 degree misalignment in

> orthogonality. The primary mirror is fixed. Collimation is good -- checked a week ago. The polar alignment is good --

> ran a session with Polemaster yesterday and checked with RAPAS today.

>

> Am I missing something obvious here?

>

> Marty


Re: AP1100 park position question

Christopher Erickson
 

IIRC they sell through distributors. Contact them and ask.

I have found the best deals on eBay. I set up an automated search and check out the new auctions as they are put up.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   


On Tue, Apr 20, 2021, 6:47 PM Don Anderson via groups.io <jockey_ca=yahoo.ca@groups.io> wrote:
Jack
Did Linak sell direct to you?

Don Anderson


On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:


Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan


Virus-free. www.avg.com


Re: AP1100 park position question

Don Anderson
 

Jack
Did Linak sell direct to you?

Don Anderson


On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:


Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan


Virus-free. www.avg.com


Re: AP1100 park position question

Christopher Erickson
 

You are right! I misremembered the name.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Tue, Apr 20, 2021, 5:36 PM Jack Huerkamp <Mallincamusa@...> wrote:

Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan


Virus-free. www.avg.com


Re: AP1100 park position question

Jack Huerkamp
 

Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan


Virus-free. www.avg.com


Re: AP1100 park position question

Christopher Erickson
 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan


Re: AP1100 park position question

mjb87@...
 

I use Park 4 in my ROR and have done this for years. I did design the ROR so i can freely move the mount in any direction with the roof closed. Very helpful to be able to put it in Park 2 or 3 with the roof closed.


Re: M 81

Mike Dodd
 

I have an ASI-1600MC Pro on a TMB130SS f/7 APO on an AP1200. I usually shoot 10m subs. For galaxies I often use Pixinsight's HDRMultiscaleTransformation to recover core detail. Here is my attempt at M81 and M82: http://astronomy.mdodd.com/galaxies-18.html

It's easy to get carried away with HDR. I've attached a screen shot of M81 where I went way too far.

CS, Mike

380x383


Re: AP1100 park position question

Shailesh Trivedi
 

Thank you your feedback Joe. This is exactly why I was asking this question. Stability also implies undue strain as you point out.


Re: AP1100 park position question

Shailesh Trivedi
 

Thank you Bryan. I am considering the height adjustable pier from Pier Tech. 


Re: AP1100 park position question

Shailesh Trivedi
 

Thanks Dale, this is very helpful


More APPM Results -- Can Someone Help Me Understand This?

mjb87@...
 

Running an APPM session with a f/10 (native f/15 with 0.67 focal reducer) Cassegrain on an 1100 using an ASI1600MC-Cool. Image scale is 0.26 but because this is a OSC at Ray's suggestion I used 0.52 for both X and Y scale. Other settings were generally standard except the max catalog magnitude was reduced to 12. (This seems to avoid a lot of checkpoint timing errors.)  This was during a half-moon almost directly overhead. Not ideal conditions. A bit of wind. I can't figure out how to manually set temperature, pressure and humidity so the default of 10 was used when it was closer to 18.

The run on the east side made sense. Most errors with a couple of dozen arcminutes. 



Things went crazy on the west side, reporting pointing errors of 10 or 15 degrees!



I installed this model and then pointed in the west and did a plate-solve and recal and got an error telling me the platesolve-based correction of 15 degrees was more than the maximum allowed. So something is wrong here.

The physical setup of the telescope on the mount seems appropriate -- for sure no 15 degree misalignment in orthogonality. The primary mirror is fixed. Collimation is good -- checked a week ago. The polar alignment is good -- ran a session with Polemaster yesterday and checked with RAPAS today.

Am I missing something obvious here?

Marty


Re: M 81

KHursh
 

Yeah, that is my rule of thumb with CMOS. Short exposures. Thanks for the kind words

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