Date   

Re: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Doug Doonan
 

Jerry,
Where does the 206.3 in your formula come from, and what are its units?
Doug



-----Original Message-----
From: Jerry Hubbell - Explore Scientific VP Engineering <jrh@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Wed, Jan 13, 2021 8:34 am
Subject: Re: [ESPMC-Eight] 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Hi Walter,

Yes, I would suggest a 2x Barlow or tele-extender instead of a 3x. The formula for pixel or plate scale is:

Pixel Scale = (Pixel Size x 206.3) / FL, So for your combination: Pixel Scale = (5.2 um x 206.3) / 162 mm = 6.6 arc-seconds/pixel

BTW,  your calibrations look spot on, no problem there,
--
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!


--

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


Re: Slew Speed while using Stellarium (Serial) #ASCOM #EXOS2

duker@...
 

Thanks for your reply Wes,

When in my backyard, the slewing noise is fine, I am thinking about when I'm in a campground, with close neighbors, slowing the slew speed down would reduce the whiling noise somewhat. That's my desire if possible.
--
Rob
Seaforth, Ontario
EXOSII-PMC8 Mount
Starwave 80ED
Starfield 50mm/ZWO ASI Guide Scope
Altair 224c/ZWO 183MC


Re: Slew Speed while using Stellarium (Serial) #ASCOM #EXOS2

Wes Mcdonald
 

Rob

The pmc8 manages its own slew speed.  The ascom driver executed a specific command to the pmc8 which takes it from there.  

What is it about the programmed speed you feel the need to change?

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


Slew Speed while using Stellarium (Serial) #ASCOM #EXOS2

duker@...
 

Good Afternoon,

Using the PMC* connected via \serial, and slewing commands sent by Stellarium, I am trying to adjust the slewing speed a bit slower. Using the ASCOM Profiler, I simply cannot find the parameter to modify the slewing speed to the mount.

Would anyone know what the parameter is to change the slewing speed when I send slew commands to the mount via ASCOM?
With thanks.

--
Rob
Seaforth, Ontario
EXOSII-PMC8 Mount
Starwave 80ED
Starfield 50mm/ZWO ASI Guide Scope
Altair 224c/ZWO 183MC


Re: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Walter,

Yes, I would suggest a 2x Barlow or tele-extender instead of a 3x. The formula for pixel or plate scale is:

Pixel Scale = (Pixel Size x 206.3) / FL, So for your combination: Pixel Scale = (5.2 um x 206.3) / 162 mm = 6.6 arc-seconds/pixel

BTW,  your calibrations look spot on, no problem there,
--
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: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Doug,

That would work if you get get the camera to the focus position with the Barlow or tele-extender. I would suggest trying it at 2x instead of 3x.
--
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: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Walter Vinci
 

Hi Jerry,

Thanks for looking at the logs. I went for the Orion guiding package because of its popularity. I thought it would be more than enough to guide my ED 80 at a 2 arc-sec/pixel imaging scale, but this seems will not be easy according to your comment.

I should then use a Barlow lens as Doug suggest or use a guiding camera with smaller pixels if I wanted to push guiding to seeing/mount limits?

Walter

On Jan 12, 2021, at 8:35 PM, Doug Doonan via groups.io <dougdwd@...> wrote:


Hi Jerry and Walter,
Would it be possible to use a 3X Barlow in the guiding scope to increase the guiding to  the 2 to3 arc-seconds you suggest?
Doug Doonan



-----Original Message-----
From: Jerry Hubbell - Explore Scientific VP Engineering <jrh@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Tue, Jan 12, 2021 2:11 pm
Subject: Re: [ESPMC-Eight] 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Hi Walter,

I am just starting to look at your guide log, but I did notice that your guide camera (an Orion Starshoot Autoguider) with a 5.8 um pixel coupled with your very short focal length guide scope (162 mm) makes you image scale very large at 6.6 arc-sec/pixel. This is a big problem if you are trying to auto guide to < 2-3 arc-seconds and is very difficult to get any better performance. This will especially the case if you seeing is poor. 

I will spend some more time looking at your guide log to see if I see anything 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!


--

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


Re: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Doug Doonan
 

Hi Jerry and Walter,
Would it be possible to use a 3X Barlow in the guiding scope to increase the guiding to  the 2 to3 arc-seconds you suggest?
Doug Doonan



-----Original Message-----
From: Jerry Hubbell - Explore Scientific VP Engineering <jrh@...>
To: MAIN@ESPMC-Eight.groups.io
Sent: Tue, Jan 12, 2021 2:11 pm
Subject: Re: [ESPMC-Eight] 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Hi Walter,

I am just starting to look at your guide log, but I did notice that your guide camera (an Orion Starshoot Autoguider) with a 5.8 um pixel coupled with your very short focal length guide scope (162 mm) makes you image scale very large at 6.6 arc-sec/pixel. This is a big problem if you are trying to auto guide to < 2-3 arc-seconds and is very difficult to get any better performance. This will especially the case if you seeing is poor. 

I will spend some more time looking at your guide log to see if I see anything 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!


--

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


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

duker@...
 


--
Rob
Kitchener, Ontario
EXOSII-PMC8 Mount
Starwave 80ED
Starfield 50mm/ZWO ASI Guide Scope
Altair 224c/ZWO 183MC


Re: 3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Jerry Hubbell - Explore Scientific VP Engineering
 

Hi Walter,

I am just starting to look at your guide log, but I did notice that your guide camera (an Orion Starshoot Autoguider) with a 5.8 um pixel coupled with your very short focal length guide scope (162 mm) makes you image scale very large at 6.6 arc-sec/pixel. This is a big problem if you are trying to auto guide to < 2-3 arc-seconds and is very difficult to get any better performance. This will especially the case if you seeing is poor. 

I will spend some more time looking at your guide log to see if I see anything 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!


3-4" RA wiggling while PHD2 guiding with EXOS2-GT PMC-eight #EXOS2 #astrophotography

Walter Vinci
 

Hi Everyone,

I am pretty new to the hobby, jus went out a few times with my EXOS2-GT PMC-eight. My first struggle with this mount was a ~ 3-4" wiggling in RA I could not get rid of. RA basically kept jumping up and down by about that much every few seconds, with and without DEC guiding. Can seeing be so bad to cause that much error? Or is it more likely a mechanical problem with the worm gear? I have attached the PHD2 logs, hopefully it gives some hints and you can help me learn how to diagnose the logs (the logs contain multiple calibration and guiding sections, probably best to have a look at the latest data).

Thank for the help,
Walter


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
 

Parag

Nice image!

My guess is APT stopped at meridian.  Look into that.

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

Parag Modi
 

My first DSO with iEXOS-100 and just a DSLR unguided.  Stack of 55 images 60 sec at 500 ISO and f/8.  Very happy with this little mount! 

Thank you for this forum members for providing guidance to a total newbie like me.

Another Newbie question though.  I was planning on 75 frames using APT and mount connected to POTH hub and using APT dithering.  However after 55 images when M42 got to meridian, rest of the images did not track M42 but were to the left of the meridian.  Any advice?

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, APT


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Wes Mcdonald
 

Rix:

I don't think you are correct.  Can't wait to see the outcome.
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: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Rix Yarbrough <yarbroughrix@...>
 

No guiding. This is only plugged into AC power and controlled with explorestars. This chugging definitely is not adequate for sidereal tracking and from what I have seen in every other example of this mount running, it is abnormal. I agree that it seems like an issue with onboard communication and not motor hardware- it's receiving the wrong signals or at least at the wrong times. Talking more with ES customer support about it.

Virus-free. www.avast.com

On Mon, Jan 11, 2021 at 6:48 AM Wes Mcdonald <wesmcd6@...> wrote:
Rix

To what Dino said:

On the iexos you can’t swap the drive cables but you can, if you want to, swap the motors.   But without thinking much more about it I feel the motor is fine.  I don’t think you could see the pulley chug along at sidereal rate.

I will fool with my iexos today and see if it looks like it jerks along 

But not round stars are usually ultimately caused by a combination of issues not the mount motors.  Btw what focal length was your scope?  Remind me we’re you guiding?  If so what was the rms error reported by PhD.

Wes

On Sun, Jan 10, 2021 at 10:47 PM Rix Yarbrough <yarbroughrix@...> wrote:
If I press [Tr], changing to <P>, the chugging continues but is now more irregular and less rhythmic. What should I be looking/listening for? I can see the motor moving normally, but only every chug, there is no constant motion. There is constant motion and it sounds ordinary while slewing, but while tracking the issue persists no matter what.

On Sun, Jan 10, 2021 at 10:20 PM Wes Mcdonald <wesmcd6@...> wrote:
Rix 

I mean press the T button in explorestars which puts the mount into point mode not park.  

The sound is caused by a resonance that seems to happen with the motor assembly and the pulses driving the stepper motor.  At least that has always been my theory.  See if they
Change in P 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


--
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


Virus-free. www.avast.com


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Wes Mcdonald
 

Rix

To what Dino said:

On the iexos you can’t swap the drive cables but you can, if you want to, swap the motors.   But without thinking much more about it I feel the motor is fine.  I don’t think you could see the pulley chug along at sidereal rate.

I will fool with my iexos today and see if it looks like it jerks along 

But not round stars are usually ultimately caused by a combination of issues not the mount motors.  Btw what focal length was your scope?  Remind me we’re you guiding?  If so what was the rms error reported by PhD.

Wes

On Sun, Jan 10, 2021 at 10:47 PM Rix Yarbrough <yarbroughrix@...> wrote:
If I press [Tr], changing to <P>, the chugging continues but is now more irregular and less rhythmic. What should I be looking/listening for? I can see the motor moving normally, but only every chug, there is no constant motion. There is constant motion and it sounds ordinary while slewing, but while tracking the issue persists no matter what.

On Sun, Jan 10, 2021 at 10:20 PM Wes Mcdonald <wesmcd6@...> wrote:
Rix 

I mean press the T button in explorestars which puts the mount into point mode not park.  

The sound is caused by a resonance that seems to happen with the motor assembly and the pulses driving the stepper motor.  At least that has always been my theory.  See if they
Change in P 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


--
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: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Rix Yarbrough <yarbroughrix@...>
 

If I press [Tr], changing to <P>, the chugging continues but is now more irregular and less rhythmic. What should I be looking/listening for? I can see the motor moving normally, but only every chug, there is no constant motion. There is constant motion and it sounds ordinary while slewing, but while tracking the issue persists no matter what.


On Sun, Jan 10, 2021 at 10:20 PM Wes Mcdonald <wesmcd6@...> wrote:
Rix 

I mean press the T button in explorestars which puts the mount into point mode not park.  

The sound is caused by a resonance that seems to happen with the motor assembly and the pulses driving the stepper motor.  At least that has always been my theory.  See if they
Change in P 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: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Dino Monaco
 

Rix.  I don’t think you can try this on the PMC8 system 
That is to swap the RA & Dec cables. Although I’m familiar w the EOS system, I’m not sure if this can be done.
I’m  still waiting for mine. Back ordered.

Anyway, My thought was that if if there is a way to exchange the cables to the drive motors and run them, you can determine once and for all if the noise is isolated to the RA motor or something along the com path.



On Jan 10, 2021, at 10:08 PM, Rix Yarbrough <yarbroughrix@...> wrote:


When putting it in park it definitely doesn’t sound right- don’t know how to explain it. Sound comes back when I unpark. Even if this sound isn’t abnormal I sure know it’s not normal to hear nothing but it. It’s the same when connected via ascom as well, so I don’t think it’s an issue with explorestars. 

On Sun, Jan 10, 2021 at 20:22 Wes Mcdonald <wesmcd6@...> wrote:
Dino.  

That sounds actually ok.  Put the explorestars into P mode and see how it changes sound.  That funny chugging sound is not unusual, at least I ha e heard it too.  But in truth seems like is is softer

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


--
Dino Monaco


Re: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Wes Mcdonald
 

Rix 

I mean press the T button in explorestars which puts the mount into point mode not park.  

The sound is caused by a resonance that seems to happen with the motor assembly and the pulses driving the stepper motor.  At least that has always been my theory.  See if they
Change in P 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: iEXOS-100 RA axis motor struggles, doesn't track #iEXOS-100 #goto #tracking

Rix Yarbrough <yarbroughrix@...>
 

When putting it in park it definitely doesn’t sound right- don’t know how to explain it. Sound comes back when I unpark. Even if this sound isn’t abnormal I sure know it’s not normal to hear nothing but it. It’s the same when connected via ascom as well, so I don’t think it’s an issue with explorestars. 

On Sun, Jan 10, 2021 at 20:22 Wes Mcdonald <wesmcd6@...> wrote:
Dino.  

That sounds actually ok.  Put the explorestars into P mode and see how it changes sound.  That funny chugging sound is not unusual, at least I ha e heard it too.  But in truth seems like is is softer

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

1361 - 1380 of 10443