Date   

Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Shailendra Sharma <sshailendrasharma@...>
 

Hi all.

I have made some videos on you tube. Have a look at the nina sequence. Subs upto 5 mins no polar alignment.!
 

 

Nina sequence - https://youtu.be/prv1FQoBs90



Thanks
Shailendra aka Chox Sta


From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> on behalf of John Wells <jfw@...>
Sent: Sunday, August 9, 2020 9:47:31 AM
To: main@espmc-eight.groups.io <main@espmc-eight.groups.io>
Subject: Re: [ESPMC-Eight] Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment
 
Apps like Polar Align Pro will tell you where exactly to place polaris in the reticle.
On 9 Aug 2020, at 03:25, Chuck Lewis <clewis@...> wrote:
From what I've been able to dig out, Mike Leemhuis  is correct: the four circles are for the Southern Sky. The EXOS2 is an update of the Meade LXD 75; our EXOS2  uses the same polar alignment scope and shares its instruction manual. That set of instructions  (for both mounts) does seems to leave out the note that those four stars are for the Southern Hemisphere, where Polaris is unavailable.   I initially tried to align to those, too, but was never convinced! A little digging on the 'web turned up a slick way to use the scope for those of us in the Northern Hemisphere :

http://www.thestardeckobservatory.com/Polaralign.html

This describes the "Clay's Kochab Clock" method. It uses an imaginary line between Kochab and Polaris as a reference for setting the RA prior to adjusting the azimuth and elevation controls. It's simple and quick, for those who really want or need to do a careful physical alignment. Once I got it in my brain, it made sense.

I can see Polaris but not Kochab; so I cheat a little and use one of the virtual displays available on my cellphone in order to check the angle of the line between Kochab and Polaris. I can swing the RA until the counterweight shaft aligns with what I see on my phone. It's probably not perfect, but still better than simply centering Polaris, and only takes a few minutes.

As a newbie, this feels right; but It would be great to have a real Guru declare it correct.



Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

John Wells
 

Apps like Polar Align Pro will tell you where exactly to place polaris in the reticle.

On 9 Aug 2020, at 03:25, Chuck Lewis <clewis@...> wrote:
From what I've been able to dig out, Mike Leemhuis  is correct: the four circles are for the Southern Sky. The EXOS2 is an update of the Meade LXD 75; our EXOS2  uses the same polar alignment scope and shares its instruction manual. That set of instructions  (for both mounts) does seems to leave out the note that those four stars are for the Southern Hemisphere, where Polaris is unavailable.   I initially tried to align to those, too, but was never convinced! A little digging on the 'web turned up a slick way to use the scope for those of us in the Northern Hemisphere :

http://www.thestardeckobservatory.com/Polaralign.html

This describes the "Clay's Kochab Clock" method. It uses an imaginary line between Kochab and Polaris as a reference for setting the RA prior to adjusting the azimuth and elevation controls. It's simple and quick, for those who really want or need to do a careful physical alignment. Once I got it in my brain, it made sense.

I can see Polaris but not Kochab; so I cheat a little and use one of the virtual displays available on my cellphone in order to check the angle of the line between Kochab and Polaris. I can swing the RA until the counterweight shaft aligns with what I see on my phone. It's probably not perfect, but still better than simply centering Polaris, and only takes a few minutes.

As a newbie, this feels right; but It would be great to have a real Guru declare it correct.



Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

I got the problem sorted out and am imaging happily right now.

Thanks,
-vijay


Re: IEXOS 100, ASIAIR, SKY SAFARI #iEXOS-100

vijaysam@...
 

I got the problem sorted out by updating to the latest firmware.


Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

 
Edited

From what I've been able to dig out, Mike Leemhuis is correct: the four circles are for the Southern Sky. The EXOS2 is an update of the Meade LXD 75; our EXOS2 uses the same polar alignment scope and shares its instruction manual. That set of instructions (for both mounts) does seems to leave out the note that those four stars are for the Southern Hemisphere, where Polaris is unavailable. I initially tried to align to those, too, but was never convinced! A little digging on the 'web turned up a slick way to use the scope for those of us in the Northern Hemisphere :

http://www.thestardeckobservatory.com/Polaralign.html

This describes the "Clay's Kochab Clock" method. It uses an imaginary line between Kochab and Polaris as a reference for setting the RA prior to adjusting the azimuth and elevation controls. It's simple and quick, for those who really want or need to do a careful physical alignment. Once I got it in my brain, it made sense.

I can see Polaris but not Kochab; so I cheat a little and use one of the virtual displays available on my cellphone in order to check the angle of the line between Kochab and Polaris. I can swing the RA until the counterweight shaft aligns with what I see on my phone. It's probably not perfect, but still better than simply centering Polaris, and only takes a few minutes.

As a newbie, this feels right; but It would be great to have a real Guru declare it correct.



--
Scope: Astro-tech AT72ED, Nikon kit lenses
Mounts: Exos2GT-PMC8, homebrew barndoor tracker
Camera: Nikon D7000
S/W:  Backyard Nikon, DeepSkyStacker, Paintshop Pro 2020


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

Richard Harvey <harvey.richard2007@...>
 

Hello! 

I've had the exact same problem a few weeks ago! You have to install the "a" version of your PMC-8 firmware. The problem is that the "regular" firmware stops tracking after about 18 secs (can't remember why), while the "a" version will not do that. I'll forward the mail I got from J. Hubbell to explain this better. 

Richard

Richard

Le sam. 8 août 2020 15:48, <vijaysam@...> a écrit :

I have got asi air pro connected to iExos 100 over serial and am able to access the mount through the asi air app. I am able to control the mount as well being able to slew to an object etc.,

The problem I have is sidereal tracking does not seem to work even though the tracking is enabled on the app to track sidereal.

How could I get the mount to track through asi air pro?

I have tried to connect the same mount over serial to a computer and using POTH, I am able to see that tracking works without any issues.

What is it that I am missing in asi air pro where its not tracking proper?

 

Thanks,

-vijay


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

I think I have got the problem resolved. I can see the mount tracking now.

I did the firmware update to the latest ES1A10B5.

Seems that fixed the problem.

I will test the mount out tonight and see how things go. So far, things look its working as it should though.

Thanks,
-vijay


Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Mike Leemhuis
 

I think there's a common misconception that the polar scope reticule image of 4 trapazoid spaced stars are the "scoop" of the big dipper.  That is not true.  You would use these 4 stars if you were in the southern hemisphere and had to align to the south pole.  If you consult Stellarium or similar program, you can see these 4 alignment stars very near the south pole.  They have nothing to do with Ursa Major.  If you live in the northern hemisphere, ignore them.

Mike


--
Location: Nicholasville, KY
Mount: Explore Scientific Exos-2
Scope: Explore Scientific ED102CF, Orion 60mm guidescope
Camera: QHY163C and QHY5L-ii
Filter: Optolong L-eNhance 2"
Software: ASCOM, PHD2, CDC, Stellarium, Sharpcap Pro, NINA, Deep Sky Stacker, Affinity Photo, Lightroom
Computer:  ASRock X570 Steel Legend, AMD Ryzen 7 3700X 8-Core Processor, 3600Mhz
Extras:  Lots of 3D printed parts I designed for improved usability


Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Rick Hughes
 

On Sat, Aug 8, 2020 at 02:01 PM, Doug Doonan wrote:
Hi Brian,
 This sounds really neat and it is like what I want to do. Some questions:
Ursa Major is the big dipper, and it is big in the sky. What part of the BD do you use to align with what part of the reticule? The reticule has a bucket shaped arrangement of little circles opposite where Polaris is, at least in my scope. Is that what you align with the bucket in the  BD?
Casseopea (sp) is on the other side of of Polaris from the BD. I don't see how you can use  one OR the other to get a  Polar alignment. If you use the BD the NCP will be to the left of Polaris. If you use CASS the NCP will be on the right side. Only one can be correct, I think.
Great method if I could understand the details.
Comments?
Doug Doonan
 
 
 
-----Original Message-----
From: brian skinner <brianjimskinner@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Sat, Aug 8, 2020 9:21 am
Subject: Re: [ESPMC-Eight] Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Hi Doug, my modus operandi doesn't worry about putting stars in the reticle circles. I eyeball either Ursa Major OR CASS. (either will do). I then rotate the reticle of the PS carefully until the orientation of the real constellation and the reticule constellation are the same. I then physically move the mount and lat adjuster until Polaris appears in the reticule. Additional careful mount adjustment is done until Polaris is positioned in the little gap along the line marked Polaris. I then power up my mount and away I go.
Please note I am using the iEXOS100 PS, yours maybe different.

Hope that helps, Brian
--
Brian Skinner
iEXOS100
Canon 1300d dslr
Various lenses
ES Polar scope
Sequator image stacker
PIXR image editor

--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.

I don't think the iEXOS100 has the same polar scope reticule as the EXOS2. The "bucket shaped arrangement of little circles" I think is for aligning with the south celestial pole.

I use the android app PolarAlignerPro and select the reticule for Meade LXD55 which seems to match my EXOS2 reticule.

Also, see this thread on CloudyNights:

https://www.cloudynights.com/topic/614983-polarscope-alignment-calibration-help-needed/
--
Mount: EXPLORE SCIENTIFIC EXOS2-GT EQUATORIAL MOUNT WITH PMC-EIGHT GOTO SYSTEM
Scope: ED115 FPL53 115MM F/5.5 AIR-SPACED TRIPLET ED APO REFRACTOR IN CARBON FIBER


Re: IEXOS 100, ASIAIR, SKY SAFARI #iEXOS-100

vijaysam@...
 

Hi Wade,

Do you use ASIAIR with iExos for sidereal tracking?

I am having the same setup like yours, iExos with ASI AIR pro.
Goto works without any issues over serial, but there is no tracking even though tracking is enabled on the asi air app on telescope setting.

Let me know.

Thanks,
-vijay


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 
Edited

Hi Harry,

Thanks for responding.

I actually have tried to access the mount through both Android and IPad. I usually use android.
In both platforms, the behavior is same. There is no tracking.

With ref to your ZWO document reference, I had already got the serial port switch done and am successfully connecting to the serial port over a USB cable. I am able to control the mount like a goto mount where I am able to slew to targets without any issues.

But the biggest problem is where there is no sidereal tracking control from the app to mount though tracking is enabled on the app. This is only with ASI AIR. I have tried the mount over serial to a computer and tracking works as it should over POTH.

Thanks,
-vijay


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

Harry
 

Hi Vijay, I am assuming you are controlling the ASIair with a tablet.If so, iPad or Android? I know when I use my iPad with ExploreStars, I must be careful to not let the iPad ever sleep, or have any other app running in the background. ExploreStars must be the only active app. So probably the same when running the ASIair app. Android seems less fussy. So perhaps its a tablet interface issue.

Secondly, have you seen this document from ZWO (see attachment). Especially the beginning about 
Explore Scientific PMC Eight Application Note PMC-8 AN003. 

Hope this may be helpful.  Harry
--
Harry
Vero Beach, FL

Mounts: ES iExos 100-PMC Eight, ExploreStars iPad, Fire HD8
Scopes: ES  ED80CF, ES AR102,  Meade ETX 90 EC (Deforked)
Software: MacOS, Starry Sky Stacker, Affinity Photo, Lightroom,  SkySafari Plus
Cameras: Nikon D600, D5500
Misc: ES USB Power Bank, Rigel QuikFinder, 0.8x Focal Reducer, Filters:
 Optolong L-Pro, L-eNhance





Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

I came across this thread

https://espmc-eight.groups.io/g/MAIN/topic/iexos100_tracking_issues/34540664?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,40,34540664

which refers to issues with iExos and asi air.

I confirmed the firmware version on my mount was also ES1A10B2.
I flashed ES1A10B5 which was the latest from the eeprom downloaded through PMC eight config manager. I didn't see any difference atleast on the green light being consistently on just accessing air app. It behaved the same way, when the telescope settings page was accessed, where it became green and went off immediately as soon as one exited the page.

I will try to do some more testing and see how things look with the newer eeprom.

Thanks,
-vijay 


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

Jerry,

What could be the issue then?

I notice the green light coming on when I am on the telescope settings on asi air. I will try to wait and see if it does any tracking in this mode.
As  soon as I move out of the page, the light goes off. I have usually noted that when tracking is happening through other means (POTH or explore stars), the green light is on consistently as long as those applications are tracking.

Thanks,
-vijay


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

Wes Mcdonald
 

Oops.  Missed that detail.  Nice catch Jerry

Wes 

--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

Jerry Hubbell - Explore Scientific VP Engineering
 

The iEXOS 100 mount firmware does not stop the tracking like the G11 or EXOS2 mounts. There is no "a" version firmware for the iEXOS 100. That is not the issue with your ASIAIR, it is something else.
--
Jerry Hubbell
Vice President of Engineering

Explore Scientific, LLC.
jrh at explorescientific.com

www.explorescientificusa.com
1010 S. 48th Street
Springdale, AR 72762
1-866-252-3811

Author: Scientific Astrophotography: How Amateurs Can Generate and Use Professional Imaging Data
             Remote Observatories for Amateur Astronomers: Using High-Powered Telescopes From Home


Mark Slade Remote Observatory (MSRO) IAU MPC W54 Equipment
Wilderness, VA
Mounts
: ES PMC-Eight G11 + Telescope Drive Master (TDM)
Scopes: ES 165 FPL-53 ED APO CF, ES 102 FCD100 ED APO CF
Cameras:  QHY174M-GPS + FW, QHY163C
Misc: 3-inch 0.7x Focal Reducer Field Flattener, Filters: Luminance,
Red, V-band Photometric, Diffuser, 200 lpmm Spectral Grating

Software: MaxIm DL 6, Cartes du Ciel, Astrometrica, AstroImageJ, AutoStakkert!


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

On Sat, Aug 8, 2020 at 02:51 PM, Wes Mcdonald wrote:
“a” version of the firmware into the pmc8
What is the "a" version and where can I get that?

On PMC eight configuration manager, firmware tab I see a bunch of eeprom listed some referring to the mount type. Is the "a" version one of them?

Thanks for responding.

-vijay


Re: Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

Wes Mcdonald
 

 Vijay

I believe this is a common condition with the asi air. The solution is to load the “a” version of the firmware into the pmc8. That version tracks continuously without being continuously pinged.  The other version stops when it thinks it is disconnected.  Asi air does not keep that version alive but the “a” version works well.

Wes 

--
Wes, Southport NC
EXos2-GT PMC-8, iExos 100
ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide scope ~ 260mm FL
Polemaster, Orion ST-80 and SAG, ZWO 290MM, D5300 astro modified
Nina, Bootcamped Mac Mini control computer, RDP to iMAC
110 amp hour lead acid deep discharge battery for field power
Electrical Engineer, Retired


Issues with tracking on iExos 100 with Asi Air Pro #iEXOS-100

vijaysam@...
 

I have got asi air pro connected to iExos 100 over serial and am able to access the mount through the asi air app. I am able to control the mount as well being able to slew to an object etc.,

The problem I have is sidereal tracking does not seem to work even though the tracking is enabled on the app to track sidereal.

How could I get the mount to track through asi air pro?

I have tried to connect the same mount over serial to a computer and using POTH, I am able to see that tracking works without any issues.

What is it that I am missing in asi air pro where its not tracking proper?

 

Thanks,

-vijay


Re: Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Doug Doonan
 

Hi Brian,
 This sounds really neat and it is like what I want to do. Some questions:
Ursa Major is the big dipper, and it is big in the sky. What part of the BD do you use to align with what part of the reticule? The reticule has a bucket shaped arrangement of little circles opposite where Polaris is, at least in my scope. Is that what you align with the bucket in the  BD?
Casseopea (sp) is on the other side of of Polaris from the BD. I don't see how you can use  one OR the other to get a  Polar alignment. If you use the BD the NCP will be to the left of Polaris. If you use CASS the NCP will be on the right side. Only one can be correct, I think.
Great method if I could understand the details.
Comments?
Doug Doonan



-----Original Message-----
From: brian skinner <brianjimskinner@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Sat, Aug 8, 2020 9:21 am
Subject: Re: [ESPMC-Eight] Explore Scientific EXOS-2 PMC-Eight GOTO Mount illuminated polar alignment + 90 degree polar alignment

Hi Doug, my modus operandi doesn't worry about putting stars in the reticle circles. I eyeball either Ursa Major OR CASS. (either will do). I then rotate the reticle of the PS carefully until the orientation of the real constellation and the reticule constellation are the same. I then physically move the mount and lat adjuster until Polaris appears in the reticule. Additional careful mount adjustment is done until Polaris is positioned in the little gap along the line marked Polaris. I then power up my mount and away I go.
Please note I am using the iEXOS100 PS, yours maybe different.

Hope that helps, Brian
--
Brian Skinner
iEXOS100
Canon 1300d dslr
Various lenses
ES Polar scope
Sequator image stacker
PIXR image editor

--

Doug Doonan
HomeBru  6 inch Reflector  f 6.6
HomeBru  85 mm Refractor  f 5.6
PMC-8, EXOS 2
Long retired EE.

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