Date   

Re: Meridian Flip #ASCOM #EXOS2

Wes Mcdonald
 

Parag

There is no way to prevent the flip if your Astro program insists on dithering near the meridian. Nina will pause imaging at a time before flip. I guess planning is the only thing you can do 

As for centering on a target after a flip there are several things that come to mind but they all basically get down to mount alignment imperfections.  The mount it self can make the perfect move.  But if there are any errors with alignment and all the things that affect alignment it won’t hit the flipped target.  The thing to do after a meridian flip is to platesolve again and continue imaging.   Nina will do this for you. I guess with apt you will just have to be there. 

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: Connection issue #iEXOS-100 #ASCOM

Luiz Sanches
 


Connection issue #iEXOS-100 #ASCOM

Daniel Burdziak
 

I had to switch to a new hard drive, and since doing so I cannot get the I-exos100 to work. I’ve followed all guides and nothing.

Im trying to use ASCOM with my win10 laptop. If someone could explain what to do (and what to download) like I’m 5 it would be great. 


Re: Meridian Flip #ASCOM #EXOS2

Parag Modi
 

Wes,

Thank you.  A couple of questions:
1) Is there a way to delay this behavior?
2) What could have caused my target not within my FOV after the flip?

If after the flip my target would have remained centered, I could have probably continued my imaging session.

--
Parag Modi

Mounts: ES iEXOS-100
Scopes: APS-C Sigma 18-300 mm
Cameras:  Nikon D7200 (Unmodified)
Misc: Bahtinov Mask, K&F Concept Clear night filter
Software: ExploreStars, Stellarium


Re: Meridian Flip #ASCOM #EXOS2

Wes Mcdonald
 

Parag

When the dither happened the new commanded position was likely beyond meridian.  This resulted in a meridian flip.  Any goto that has a location across the meridian will generate a flip.  The mount will not do a flip if it is just tracking along.

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: Meridian Flip #ASCOM #EXOS2

Parag Modi
 

I was doing an imaging session last night and experienced an automatic meridian flip.  I was using APT, ASCOM with my iEXOS-100 and a Nikon D7200.  I did not have APT configured for automatic meridian flip, however I was using APT dithering on every two frames for up to 10 pixel random moves.  I am using POTH Hub with PMC-8 ASCOM driver.  Here's the sequence of events:  As my target got to meridian, on the next subsequent dither the mount automatically flipped.  Fortunately I was nearby.  After the flip, I could not locate my target in my FOV so I stopped he imaging session, waited about 20 minutes and re-centered my target using APT/Platesolve before resuming my imaging session.

Any idea what could have forced a meridian flip?  In the ASCOM setup, under coordinate management dialog I see settings for GEM Flip delay which I had set to default to 0.  Could that be the explanation?

All in all my session went well, but I would have preferred to continue imaging since there is very little chance of me running into the tripod due to my small setup.

Thank you,


--
Parag Modi

Mounts: ES iEXOS-100
Scopes: APS-C Sigma 18-300 mm
Cameras:  Nikon D7200 (Unmodified)
Misc: Bahtinov Mask, K&F Concept Clear night filter
Software: ExploreStars, Stellarium


Re: iExos 100 disconecting from wifi #iEXOS-100

Luiz Sanches
 

Thank you. I start a test now.
I dont know if this will work, because last month I bought a HUB USB 3.0 (powered) and I put all thinks on it (Cameras, HD and the Mount), and only the mount disconnects from the computer. For stay clear: with or withought the HUB USB the problems with the mount are the same.

But, lets try this!


Re: iExos 100 disconecting from wifi #iEXOS-100

Steve Siedentop
 

The Windows 10 feature is called Selective Suspend and it’s a power management feature designed to extend battery life.

Check out this article to see how to disable it.


-Steve


On Sun, Feb 7, 2021 at 10:32 AM Robert Hoskin <devonshire@...> wrote:
Luiz,

So... intermittent problem, can happen with either POTH or Device Hub?

You don't say what you're using for a mount computer, but I assume that it's a laptop and probably either Win10 or Win7...

Windows might be cutting power to your USB port, thinking that it's idle - when it's not.  I've no idea how it decides that a port is 'idle', but It's not unusual for people to have to turn that power management feature off, so Windows apparently has its own ideas about that.  

Anyway.... I'd suggest that you check your Windows power settings, probably 'advanced', and check to see if USB 'selective suspend' is enabled.  If it is, disable it and see if that helps.


On Sun, Feb 7, 2021, at 05:30, Luiz Sanches via groups.io wrote:
The problem continues: connected via serial, I can have a entire night without any disconnection with the mount, or, in other night, lose the connection so many times that make impossible to use the mount.

Some news: run as administrator don't solve. 
Some times the mount is disconnected, but the green light is on. I can only click in the disconnect and connect again in the device hub. Most of the times I need to finish the device hub in task manager.
On nights that I am not photographing, I am only collimating the telescope and I am using only one application, like Apt, the mount never disconnects. Is the windows losing focus and disconnecting the mount drivers when I change one program to other? I use at same time Apt, phd2, stellarium and others plat solvers. 

I use always serial, to avoid wifi problems. I use any drivers from scientific explorer and the last firmware in the mount. I only use device hub, not POTH because when the mount disconnect, POTH sometimes can't be finished in the task manager.

Thank you.


--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


--
Mounts: ES PMC-8 G11 with Ruland Couplers and One Piece Worm Blocks, Skywatcher NEQ-6
Scopes: ES ED127CF FCD100, Orion 6” Mak, Stellarvue SV80EDT, Coronado Solarmax 40
Cameras:  CentralDS CDS-600, CentralDS Astro 60D, Orion Starshoot SSAG
Msc: Moonlite Focusers, Astrozap Dew Straps, Pegasus Ultimate PowerBox
Software: PixInsight, Cartes du Ciel, BackyardEOS, SkySafari


Re: iExos 100 disconecting from wifi #iEXOS-100

Luiz Sanches
 

can happen with either POTH or Device Hub?
Yes, the same way! 
laptop and probably either Win10 or Win7
I use most of times a Macbook with a Boot Camp with Windows 10. Recently I reinstaled the windows and the problem continues. I have other desktop computer, AMD Phenon wih Windows 10 and the problem occurs in the same way.
Windows power settings, probably 'advanced', and check to see if USB 'selective suspend' is enabled.  If it is, disable it and see if that helps.
Thank, I will try!


Re: iExos 100 disconecting from wifi #iEXOS-100

 

Luiz,

So... intermittent problem, can happen with either POTH or Device Hub?

You don't say what you're using for a mount computer, but I assume that it's a laptop and probably either Win10 or Win7...

Windows might be cutting power to your USB port, thinking that it's idle - when it's not.  I've no idea how it decides that a port is 'idle', but It's not unusual for people to have to turn that power management feature off, so Windows apparently has its own ideas about that.  

Anyway.... I'd suggest that you check your Windows power settings, probably 'advanced', and check to see if USB 'selective suspend' is enabled.  If it is, disable it and see if that helps.


On Sun, Feb 7, 2021, at 05:30, Luiz Sanches via groups.io wrote:
The problem continues: connected via serial, I can have a entire night without any disconnection with the mount, or, in other night, lose the connection so many times that make impossible to use the mount.

Some news: run as administrator don't solve. 
Some times the mount is disconnected, but the green light is on. I can only click in the disconnect and connect again in the device hub. Most of the times I need to finish the device hub in task manager.
On nights that I am not photographing, I am only collimating the telescope and I am using only one application, like Apt, the mount never disconnects. Is the windows losing focus and disconnecting the mount drivers when I change one program to other? I use at same time Apt, phd2, stellarium and others plat solvers. 

I use always serial, to avoid wifi problems. I use any drivers from scientific explorer and the last firmware in the mount. I only use device hub, not POTH because when the mount disconnect, POTH sometimes can't be finished in the task manager.

Thank you.


--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Re: iExos 100 disconecting from wifi #iEXOS-100

Luiz Sanches
 

The problem continues: connected via serial, I can have a entire night without any disconnection with the mount, or, in other night, lose the connection so many times that make impossible to use the mount.

Some news: run as administrator don't solve. 
Some times the mount is disconnected, but the green light is on. I can only click in the disconnect and connect again in the device hub. Most of the times I need to finish the device hub in task manager.
On nights that I am not photographing, I am only collimating the telescope and I am using only one application, like Apt, the mount never disconnects. Is the windows losing focus and disconnecting the mount drivers when I change one program to other? I use at same time Apt, phd2, stellarium and others plat solvers. 

I use always serial, to avoid wifi problems. I use any drivers from scientific explorer and the last firmware in the mount. I only use device hub, not POTH because when the mount disconnect, POTH sometimes can't be finished in the task manager.

Thank you.


Re: Advice on exos2 dec movement. #EXOS2

Walter Vinci
 

Hi Jerry,

Your point makes totally sense. Just as a reference point for a new Exos2 owner, what would you consider a good range for polar alignment offset? Anything as large as to avoid field rotation? Any insight from experienced users would be great. As you said, alignment tools like Sharpcap could also used very easily to achieve a desired offset in the alignment. 

Thanks,
Walter

On Feb 6, 2021, at 8:32 PM, Jerry Hubbell - Explore Scientific VP Engineering <jrh@...> wrote:

On Sat, Feb 6, 2021 at 11:32 AM, Robert Hoskin wrote:
Basically, less appears to be more where DEC guiding is concerned. 
Hi Bob,

I agree with you in terms of DEC guiding. In fact I go much further in my assessment. The following may go against the conventional wisdom a little bit and impacts the need for a precise polar alignment. You may already know where I am going with this.

I would say that for less expensive mounts where the quality of the gear train is not in the upper tier, obtaining a near perfect polar alignment with the great tools available including the QHY Polemaster, and others is not the optimum solution. This works great in higher end mounts where the quality is higher because the system can handle the switching from North to South direction of the control pulses to maintain tight control over the DEC position. To tell the truth, with higher end mounts with a near perfect polar alignment, I contend that you should not be guiding in DEC at all unless you are pointing lower on the horizon (< 30 degrees altitude) to correct for refractive tracking errors.

In the case of the lower end mounts, allowing PHD2 to correct excursions in DEC by switching between North and South pulses (which you will need to do with a near perfect polar alignment) in the presence of any amount of gear lash makes things worse. A much better solution is to leave a bit of polar alignment offset so that you can control and mitigate any switching of the pulse-guide direction. You also need to bias the equipment load to be "camera heavy" on the DEC axis so you can ensure a positive/constant worm/wheel contact which minimizes the effect of any gear lash in the system. This will generally result in much better performance for lower end mount systems such as the EXOS 2 and iEXOS 100 PMC-Eight systems. 

This has generally been my experience and also the experience of a lot of customers I have spoken to over the years. IMHO, the advent of these new polar alignment tools over the past few years has ironically made the problem worse for astrophotographer's using lower end equipment as I said above. 

I would love to hear everyone's thoughts on this

Thanks
 
--
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: Advice on exos2 dec movement. #EXOS2

Jerry Hubbell - Explore Scientific VP Engineering
 

On Sat, Feb 6, 2021 at 11:32 AM, Robert Hoskin wrote:
Basically, less appears to be more where DEC guiding is concerned. 
Hi Bob,

I agree with you in terms of DEC guiding. In fact I go much further in my assessment. The following may go against the conventional wisdom a little bit and impacts the need for a precise polar alignment. You may already know where I am going with this.

I would say that for less expensive mounts where the quality of the gear train is not in the upper tier, obtaining a near perfect polar alignment with the great tools available including the QHY Polemaster, and others is not the optimum solution. This works great in higher end mounts where the quality is higher because the system can handle the switching from North to South direction of the control pulses to maintain tight control over the DEC position. To tell the truth, with higher end mounts with a near perfect polar alignment, I contend that you should not be guiding in DEC at all unless you are pointing lower on the horizon (< 30 degrees altitude) to correct for refractive tracking errors.

In the case of the lower end mounts, allowing PHD2 to correct excursions in DEC by switching between North and South pulses (which you will need to do with a near perfect polar alignment) in the presence of any amount of gear lash makes things worse. A much better solution is to leave a bit of polar alignment offset so that you can control and mitigate any switching of the pulse-guide direction. You also need to bias the equipment load to be "camera heavy" on the DEC axis so you can ensure a positive/constant worm/wheel contact which minimizes the effect of any gear lash in the system. This will generally result in much better performance for lower end mount systems such as the EXOS 2 and iEXOS 100 PMC-Eight systems. 

This has generally been my experience and also the experience of a lot of customers I have spoken to over the years. IMHO, the advent of these new polar alignment tools over the past few years has ironically made the problem worse for astrophotographer's using lower end equipment as I said above. 

I would love to hear everyone's thoughts on this

Thanks
 
--
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!


N

charles mckowen
 


--
Chuck McKowen
Bortle 3 Mangham/Monroe, La

WO Z61, WO REDCAT 51, ES ED102 100, Orion 8 Rc
Skywatcher eq6 r pro/Exos2 pmc8/ Atlas Eq-g pro
Qhy163c/m
Qhy183c 
asi533mc pro
Canon Eos Ra 
EQMod/Poth - APT, Stellarium, Stellarium scope, and PHD2


 


Re: Advice on exos2 dec movement. #EXOS2

 

Charles,

This is re: DEC guiding?

I touch on this a bit in my tuning doc.  About the best you can do for DEC balance is a bit of camera-heavy bias with a refractor, but that DEC motor on the side will still skew things.  Just as with RA, a bit of DEC weight bias appears to do no harm, and perhaps some good - so no worries.

Basically, less appears to be more where DEC guiding is concerned.  Some folks don't guide DEC at all.  I'm not there, but I have cut my DEC sensitivity back a lot on PHD2.  There was a really interesting thread some time ago about mechanical movement from guide corrections in one axis triggering guide corrections in the other one.  The pattern shows up in a guide graph - one axis corrects and then the other gets busy as well.  They can go back and forth for quite a while.  I had seen that behavior on mine, and reducing DEC sensitivity helped that for me, without doing any measurable harm to my images.

FWIW...

- Bob



On Sat, Feb 6, 2021, at 10:56, charles mckowen wrote:
I was wondering if anyone knew how to improve movement in the dec. It doesn’t seem smooth and hard to balance. There’s also a slight Hang up when you rotate. Which I think is normal from the design. If anyone can help me out. I would really appreciate it. Thanks 
--
Chuck McKowen
Bortle 3 Mangham/Monroe, La

WO Z61, WO REDCAT 51, ES ED 102, AstroTech 6 Rc, Orion 8 Rc
Celestron onyx 80 edf
Skywatcher eq6 r pro/Exos2 pmc8/ Atlas Eq-g pro
Qhy163c/m
Canon Eos Ra 
EQMod/Poth - APT, Stellarium, Stellarium scope, and PHD2

 



--
Mounts: ES PMC-8 EXOS2
Scopes: SV 102EDT, ZWO 60/280 Guide
Cameras:  Nikon D5300, Altair GPCAM2 290M
Software: ASCOM, CdC, AstroTortilla, BYN Pro, Sharpcap, PHD2
Computer:  Thinkpad x230, Win7Pro/64


Advice on exos2 dec movement. #EXOS2

charles mckowen
 

I was wondering if anyone knew how to improve movement in the dec. It doesn’t seem smooth and hard to balance. There’s also a slight Hang up when you rotate. Which I think is normal from the design. If anyone can help me out. I would really appreciate it. Thanks 
--
Chuck McKowen
Bortle 3 Mangham/Monroe, La

WO Z61, WO REDCAT 51, ES ED 102, AstroTech 6 Rc, Orion 8 Rc
Celestron onyx 80 edf
Skywatcher eq6 r pro/Exos2 pmc8/ Atlas Eq-g pro
Qhy163c/m
Canon Eos Ra 
EQMod/Poth - APT, Stellarium, Stellarium scope, and PHD2


 


Re: Retro-fit kit?

Jerry Hubbell - Explore Scientific VP Engineering
 

On Sat, Jan 30, 2021 at 12:16 PM, <robert.ian.taylor@...> wrote:
Thanks for the reply. I am based in the UK and it would be prohibitively expensive to send it to the US. If you had a retro-fit kit that people could install themselves I’m sure you would sell a lot more units. Many G11 owners in Europe do their own servicing on their mounts (again because very few will send these back to Losmandy) and would potentially be capable of installing this upgrade.
Hi Robert,

I fully understand the need for a DIY upgrade kit but unfortunately we need to be able to guarantee that there isn't something that is hidden to the user that might cause the system to fail even with a proper installation This is why we have the need for our checkout process and installation at our site. We may be able to work with our sister company Bresser Germany to install the kit and verify proper operation for you, it would be much easier to ship your mount to Germany for a retrofit. Let me know if you are interested in that path.

Thanks
 
--
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: Retro-fit kit?

Ian Taylor
 

Thanks for the reply. I am based in the UK and it would be prohibitively expensive to send it to the US. If you had a retro-fit kit that people could install themselves I’m sure you would sell a lot more units. Many G11 owners in Europe do their own servicing on their mounts (again because very few will send these back to Losmandy) and would potentially be capable of installing this upgrade.


Re: Retro-fit kit?

Jerry Hubbell - Explore Scientific VP Engineering
 

On Sat, Jan 30, 2021 at 08:49 AM, <robert.ian.taylor@...> wrote:
Hello - is it possible to buy a retro-fit kit so I can install the PMC-Eight system myself on an existing Losmandy G11 mount that I own (it is a Digital Drive version). 
I have recently serviced the mount (regreased it, installed new worm block bearings, installing a new high precision worm and making sure everything is aligned) and now the periodic error is around +/-5", without PEC.

It is difficult to find a price for the kit only - or are they some mechanical changes made to the mount itself too (I imagine the motors would be different but they are easy to change). 

Thanks
Hi Robert, thanks for your interest in the PMC-Eight G11 upgrade. We offer an upgrade kit that not only installs the PMC-Eight motor drive system but also includes some upgrades to the G11; Also in order to be able to guarantee performance the price includes doing the upgrade at our location in Arkansas. We don't offer the upgrade as a DIY kit. Here is the link to the product on our website:

Explore Scientific / Losmandy G-11 UPGRADE with Explore Scientific PMC — Explore Scientific LLC (explorescientificusa.com)

Thanks again for your interest.
 
--
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!


Retro-fit kit?

Ian Taylor
 

Hello - is it possible to buy a retro-fit kit so I can install the PMC-Eight system myself on an existing Losmandy G11 mount that I own (it is a Digital Drive version). 
I have recently serviced the mount (regreased it, installed new worm block bearings, installing a new high precision worm and making sure everything is aligned) and now the periodic error is around +/-5", without PEC.

It is difficult to find a price for the kit only - or are they some mechanical changes made to the mount itself too (I imagine the motors would be different but they are easy to change). 

Thanks

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