Date   

Re: Possible defective unit #iEXOS-100 #TECHNICAL

Wes Mcdonald
 

Mario

What does the asiair use to drive the pmc8?  Does it use the Es ascom driver?

Surging during lunar viewing makes no sense relative to the pmc8.  If the moon is moving in steps it is because the mount is being driven in steps.  This is how explorestars in Point mode does it.   But when you are using the ES driver and ascom the mount tracks smoothly at sidereal rate.   No surging.   

I believe you stated the surging is not present for stars.  In fact we all know it is not as our photos look great.  

I suggest to you the issue is with how the asiair is driving the mount.

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: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Wes Mcdonald
 

Nice wade
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: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Ian Morison
 

Hi Wade,
   That is really excellent!  Was it taken from a dark location?

Something for me to aspire to.

Cheers,

Ian


On Saturday, October 3, 2020, Wade Prunty <wadeprunty@...> wrote:
Processed this after Gary Palmers's demo today.

.

Target: Messier 31, The Andromeda Galaxy

Imaged and Processed by Wade Prunty with:
William Optics SpaceCat 51 APO Telescope

Explore Scientific iEXOS-100 Mount
Canon T3i DSLR
Optolong L-Pro Filter
William Optics UniGuide Scope
ZWO ASI120MM-S
ZWO ASIAIR Pro
95 x 300 Second Exposures
PixInsight
Topaz Labs AI Suite
--
Explore Scientific iEXOS-100
Explore Scientific EXOS2 PMC-8
Explore Scientific AR102
Celestron RASA 8
William Optics SpaceCat 51 APO
ZWO ASI294MM Pro
ZWO ASI183MM Pro
ZWO ASI533MC Pro
Canon 5D, T3i (Both Astro Mods)
William Optics UniGuide
ZWO ASI120MM-S
ZWO ASIAIR Pro


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Wade Prunty
 

Processed this after Gary Palmers's demo today.

.

Target: Messier 31, The Andromeda Galaxy

Imaged and Processed by Wade Prunty with:
William Optics SpaceCat 51 APO Telescope

Explore Scientific iEXOS-100 Mount
Canon T3i DSLR
Optolong L-Pro Filter
William Optics UniGuide Scope
ZWO ASI120MM-S
ZWO ASIAIR Pro
95 x 300 Second Exposures
PixInsight
Topaz Labs AI Suite
--
Explore Scientific iEXOS-100
Explore Scientific EXOS2 PMC-8
Explore Scientific AR102
Celestron RASA 8
William Optics SpaceCat 51 APO
ZWO ASI294MM Pro
ZWO ASI183MM Pro
ZWO ASI533MC Pro
Canon 5D, T3i (Both Astro Mods)
William Optics UniGuide
ZWO ASI120MM-S
ZWO ASIAIR Pro


Re: Possible defective unit #iEXOS-100 #TECHNICAL

Mario
 

Hi Wes, I'm using an ASIAir Pro in both Sidereal and Lunar tracking mode with the iExos connected via serial cable.
I'm not sure if that makes a difference or what others have been using when experiencing the problem. I could try and use Explorestars to see if the problem exists.

Regards,

Mario


On Fri, Oct 2, 2020 at 9:13 PM Wes Mcdonald <wesmcd6@...> wrote:
Mario

Are you using explorestars?

If so are you in P or T mode?

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


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

Wes Mcdonald
 

Jdavis

Man that looks danged good.   Dust lanes, core, disc.  Nice.

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: Possible defective unit #iEXOS-100 #TECHNICAL

Wes Mcdonald
 

Mario

Are you using explorestars?

If so are you in P or T mode?

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: Possible defective unit #iEXOS-100 #TECHNICAL

Mario
 

Quick note, some others seem to be observing this same behaviour:

Appears here with lunar observation...link
This view of the iExos internals that seem to oscillate in time to what is being observed through the scope...link
Not sure if the second video is related bu seems to be....line the motor is pausing then 'catching up'

I would expect this motion to be smoothly tracking...not oscillating...


Regards,

Mario









On Fri, Oct 2, 2020 at 8:58 PM Mario via groups.io <mario1546=gmail.com@groups.io> wrote:
Hi Paul, 

I was taking video of the moon and again noticed the oscillation you observed.
Again, this doesn't seem to be an issue with stars or DSO's but very noticeable with lunar or planetary observation.
Note, the tracking seems ok, the moon stays in frame and returns to essentially to the same spot after each oscillation.

I appreciate the explanations of how the motors are in constant motion....but how do we make this go away? 

Link to video here.

Regards,

Mario

On Thu, Sep 17, 2020 at 2:28 PM Paul via groups.io <paulw617=yahoo.com@groups.io> wrote:
Hello Wes and Harry,

Thank you for the quick response and for putting my mind at ease.

Paul


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


Re: Possible defective unit #iEXOS-100 #TECHNICAL

Mario
 

Hi Paul, 

I was taking video of the moon and again noticed the oscillation you observed.
Again, this doesn't seem to be an issue with stars or DSO's but very noticeable with lunar or planetary observation.
Note, the tracking seems ok, the moon stays in frame and returns to essentially to the same spot after each oscillation.

I appreciate the explanations of how the motors are in constant motion....but how do we make this go away? 

Link to video here.

Regards,

Mario

On Thu, Sep 17, 2020 at 2:28 PM Paul via groups.io <paulw617=yahoo.com@groups.io> wrote:
Hello Wes and Harry,

Thank you for the quick response and for putting my mind at ease.

Paul


--
Regards,

Mario
Streetsville, Ontario

Mounts: iExos 100, Skyguider Pro
Scopes/Lenses: Main/Orion 80mm, DSLR/Tamron 18-400mm lens, guide/ZWO-340A
Computer: ASIAir
Cameras: Canon T2i DSLR, ZWO120MM (guide)
Utility Software: iPolar (for Skyguider polar alignment), iCap, Explorestars, Canon EOS Utility
Image Processing Software: Photoshop


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

the iexos-100 is really a fantastic mount and if you manage to fit the snap before the flexion it follows really well but this is a big problem, the flexion writes with times of 10sec., with the replacement of the defective parts it becomes really perfect, it is really a pity and above all a nuisance.


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

On Sat, Oct 3, 2020 at 01:17 AM, Jerry Hubbell - Explore Scientific VP Engineering wrote:
Based on what I saw in the video, the end cap of the small pulley seems to be wobbling as you say, but again, we need to do a measurement to see if the pulley is actually not concentric on the shaft. The only way to do that is to use PHD2 and record a guide log to evaluate the true performance. Do you have a guide log I can evaluate?
I don't have a guide tube but the worst thing is that the worm also oscillates more than the pulley, if you see the video well you can see and that's what creates the oscillation of everything, in the case of the pulley the pinion is straight in the case of the screw endless is that which is wrong.
what you need is an endless drive and a straight pulley, in DEC it's all straight.


Re: Astrophotography Done with the iEXOS-100, EXOS 2, and G11 Post your Pictures and Details! Lets Show What These Mounts Can Do. #G11 #astrophotography #iEXOS-100 #EXOS2

jdavis1278@...
 

(I am very new to the hobby, please be gentle everyone, lol)
Andromeda Galaxy 09.25.2020

64 30second subs (32min exposure) ISO1600

Meade ETX80 (stripped OTA, my wife purchased it for me years ago, and I've since stripped it from the alt/az yoke, figuring I'd utilize it whilst saving up for a proper APO)

Canon T100

Explore Scientific iExos 100


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

Jerry Hubbell - Explore Scientific VP Engineering
 

On Fri, Oct 2, 2020 at 03:07 PM, <salvo.semi@...> wrote:
yes it would be a solution but i don't like having a defective mount, i paid for a working mount and not working only partially.
Hi Salvo,

Based on what I saw in the video, the end cap of the small pulley seems to be wobbling as you say, but again, we need to do a measurement to see if the pulley is actually not concentric on the shaft. The only way to do that is to use PHD2 and record a guide log to evaluate the true performance. Do you have a guide log I can evaluate?

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!


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

yes it would be a solution but i don't like having a defective mount, i paid for a working mount and not working only partially.


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Salvo,

I would caution you to not jump to conclusions as the only way to really understand the impact of the pulley, which we have investigated a lot, is to get a guide log from your system. By analyzing the log we can see if the expected pulley related PE shows up in the periodogram at 133 seconds and 13.3 seconds. I can guarantee you that the mount is not defective in show PE in unguided images. It is not related to the pulley but the worm. Until we have a guide log that corrects the mounts tracking rate, I would not assume that your problem is related to the pulley.

The mount is not defective when displaying its native PE. These mounts must be used with an auto guider to get the best performance while imaging.
--
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!


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

yes it would be a solution but i don't like having a defective mount, i paid for a working mount and not working only partially.


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

Tony
 

Yes, ultimately I would like to replace my pulleys as well, since both my DEC and RA had substantial runout.  Unfortunately as far as I know the parts simply aren't available.

While in an ideal world, both the DEC and the RA pulleys would be 100% perfect, however if your DEC is straight and in good condition,  it makes sense to put the straight pulley in the RA position since the RA is constantly moving while imaging.  The DEC, especially when unguided, will just be sitting still.  Periodic error on the DEC wouldn't cause egged stars.

Good luck,
-Tony


On 10/2/2020 1:35 PM, salvo.semi via groups.io wrote:
hello, yes the dec is straight, and I made sure that it is only the toothed part wrong, the thing would be easy to solve as long as they provide the replacement pulleys, it is a piece that costs very little, despite being mounts under warranty and the apparently defect is not single, when I run AR you can see that it is decentralized instead the dec is perfectly straight. I would like my mount to be straight both AR and Dec


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

hello, yes the dec is straight, and I made sure that it is only the toothed part wrong, the thing would be easy to solve as long as they provide the replacement pulleys, it is a piece that costs very little, despite being mounts under warranty and the apparently defect is not single, when I run AR you can see that it is decentralized instead the dec is perfectly straight. I would like my mount to be straight both AR and Dec


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

Tony
 

Hello and welcome -

As already mentioned, guiding may go a long way towards reducing your errors. While some more expensive mounts may offer lower periodic error and produce better photos unguided, these mounts really benefit from guiding.  That would be my first suggestion. 

I have, however, experienced a similar issue as yours, even with guiding.  I would see a large error introduced to the RA axis every 133 seconds, which indicates it could be an issue with the pulley.  It sounds like yours may be the same. 

It is still unknown if the cause of my tracking/guiding error was due to the pulley teeth themselves being eccentric, or if it was a problem with the sidewall / belt keeper rubbing the belt.  Either way, one of the first troubleshooting steps ES had me do was to swap the RA and the DEC pulleys to see if the problem subsides, since the DEC is not prone to periodic error like the RA is.  You'll also want to make sure your belt tension is correct, and it is not tracking off to one side.  Hopefully your DEC pulley is straight enough that it solves your problem. 

Ultimately, those suggestions did not do much to help my situation, and my oval stars persisted even with guiding.  I have looked high and low, but have been unable to find a suitable replacement pulley.  As far as I can tell,  you would be looking for a 10 tooth GT2 type pulley with a 5mm bore.  If you happen to find one available online, please let me know.  I would love to purchase a replacement as well.

Good luck with your mount and your imaging,
-Tony


On 10/2/2020 12:29 PM, salvo.semi via groups.io wrote:
hi all, i have an iexos-100 and i noticed that taking pictures half come with elongated stars and half not, more or less at regular intervals. I tried to figure out what the problem was and I realized that the gear of the pulley of the AR motor is slightly crooked, so there are moments that stretch the belt and it could cause those micro movements that cause the stretched stars, see photo gear, I wanted to ask cove I can find this gear or at least the measures and how many teeth it has so that I can buy and replace it, the frame is still under warranty. P.S. sorry english but i used google translate.


locked Re: #iEXOS-100 crooked pulley gear #iEXOS-100

salvo.semi@...
 

as regards the focal it takes place in all focal lengths

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