Date   

Re: Received my new EXOS-2GT #EXOS2 #ExploreStars

charles mckowen <Cmckow91@...>
 

Tim congrats on the new mount! Someone with bad knees, i would move to a wired connection and ascom. So you can polar align with sharpcap and plate solve with apt or another program. If you decide to go that route I can help with set up. Are you visual or astro?


On Tue, Jun 2, 2020 at 6:58 AM Steven Romero <steven.romero@...> wrote:
Thanks Kent!

That polar scope alignment procedure needs to be posted on the website.

So far I like the products and the customer service is great! But the documentation on the scopes and mounts is pretty thin.

Regards,
Steven

On Mon, Jun 1, 2020 at 4:03 PM Kent Marts Explore Scientific Customer Service <kent@...> wrote:

Tim,

 

Here’s a draft document I’ve written.

 

DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT     

 

EXOS2GT POLAR FINDER ALIGNMENT PROCESS

This process outlines how to align the illuminated polar finder scope (SKU PFEXOS2) found in the polar axis with the polar axis of the EXOS2GT mount, whether or not the mount comes with the PMC-Eight motion control system.

To get a close polar alignment, the polar finder scope must be aligned with the polar axis.

 

THE PROCESS

This process is easiest to do without a telescope or the counterweights installed. Leave the counterweight shaft attached because it makes a good handle at a certain point.

With the EXOS2GT tripod set up outside, orient the polar axis with a fixed that is as far away as you can see – a telephone pole, a radio antenna on top of a mount, a prominent tree: Miles is better than 500 yards.

Adjust the tripod height so that when the polar axis is lowered to align with the target object the illuminated polar finder eyepiece is in a comfortable viewing position. Usually this is done while seated.

Remove the polar finder scope eyepiece cover and the screw-in port cover. Rotate the declination axis 90 degrees to open the internal viewing port.

Use the azimuth knobs and altitude control to adjust the polar axis until you can see the prominent object you selected in the illuminated polar scope.

The center of the illuminated polar finder scope is marked by a cross. That marks the Celestial Pole.

Make fine adjustment to the azimuth and altitude to get a specific part of the target object lined up with the Celestial Pole mark. Example: The top of a radio tower.

Unlock the Right Ascension and rotate the head around the polar axis – best accomplished by grasping the counterweight shaft. As it turns, watch the movement of the Celestial Pole mark. If it simply rotates and stays on the target object, then the device is perfectly polar aligned. But if it moves away from the target object as the RA is rotate, it is NOT aligned.

When the Celestial Pole mark is rotated until it’s as far away from the starting point as it can get, stop rotating it and lock the RA axis.

Now it’s time to adjust the illuminated polar finder scope. On the scope is a collar with three Allen screws. These screws adjust where the device points.

NOTE: The three-screw system requires tightening one screw and loosening two in order to keep the system tight.

Using the correct Allen wrench, look through the illuminated polar finder then slightly turn a screw – just pick one and start. After determining how that Allen screw affected the illuminated polar finder, try another screw. Through trial and error you will determine which screws need to be turned to move the Celestial Pole toward the target object.

When moving the Celestial Pole marker, only move it half way back to the target object. DO NOT move it all the way back.

With the Celestial Pole mark halfway back, use the azimuth adjustment and altitude adjustment to move the mark the rest of the way back to center it on the target object.

Unlock the RA and spin it around. At the point that it is farthest away from the target object, lock the RA.

Use the Allen screws to move the Celestial Pole marker back HALF WAY back, then finish moving with the azimuth and altitude controls.

Continue this process until the Celestial Pole marker stays in the same place when the RA spins.

The illuminated polar finder is now collimated with the polar axis of the telescope.

 

 

Kent Marts

Customer Service

Explore Scientific

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Timothy Myers via groups.io
Sent: Monday, June 1, 2020 12:25 PM
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Received my new EXOS-2GT #EXOS2 #ExploreStars

 

Bob,

I also found that I could sit in a chair and sighting through the Polar Scope was not a big issue. I ended up making marks on my driveway that helped get the mount close to the same spot each time I use it, and then started using Sharp Caps Polar Alignment tool. I have not had to site through the PA Scope in three or four months, since starting with Sharp Cap. 

I did notice however a couple weeks ago that my Polar Scope had come loose, internally. Had to remove it and tighten things up, which means I need to re-align it. i could easily do that after setting the scope up one evening, but I keep forgetting to do it. Have you done a good alignment of your Polar Scope?
--
Tim Myers

Telescopes:     Celestron 4SE, Celestron 8SE, SkyWatcher 100ED Pro
Mounts:           4-5 SE, 6-8SE, EXOS-2GT with PMC-Eight
Cameras:        ASI1600MC, Cooled
Tablets:           Asus Nexus 7, Amazon Fire 7
Laptop:           Lenovo


--
Kent Marts
Customer Service
Explore Scientific

Gear: Anything in the store!


--
Steven Romero
Location: SE Texas
Mount: EXOS2-GT PMC-8
Scope: ED102 APO


--
Chuck McKowen
Bortle 3 Mangham/Monroe, La

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


 


Re: Received my new EXOS-2GT #EXOS2 #ExploreStars

Steven Romero
 

Thanks Kent!

That polar scope alignment procedure needs to be posted on the website.

So far I like the products and the customer service is great! But the documentation on the scopes and mounts is pretty thin.

Regards,
Steven

On Mon, Jun 1, 2020 at 4:03 PM Kent Marts Explore Scientific Customer Service <kent@...> wrote:

Tim,

 

Here’s a draft document I’ve written.

 

DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT     

 

EXOS2GT POLAR FINDER ALIGNMENT PROCESS

This process outlines how to align the illuminated polar finder scope (SKU PFEXOS2) found in the polar axis with the polar axis of the EXOS2GT mount, whether or not the mount comes with the PMC-Eight motion control system.

To get a close polar alignment, the polar finder scope must be aligned with the polar axis.

 

THE PROCESS

This process is easiest to do without a telescope or the counterweights installed. Leave the counterweight shaft attached because it makes a good handle at a certain point.

With the EXOS2GT tripod set up outside, orient the polar axis with a fixed that is as far away as you can see – a telephone pole, a radio antenna on top of a mount, a prominent tree: Miles is better than 500 yards.

Adjust the tripod height so that when the polar axis is lowered to align with the target object the illuminated polar finder eyepiece is in a comfortable viewing position. Usually this is done while seated.

Remove the polar finder scope eyepiece cover and the screw-in port cover. Rotate the declination axis 90 degrees to open the internal viewing port.

Use the azimuth knobs and altitude control to adjust the polar axis until you can see the prominent object you selected in the illuminated polar scope.

The center of the illuminated polar finder scope is marked by a cross. That marks the Celestial Pole.

Make fine adjustment to the azimuth and altitude to get a specific part of the target object lined up with the Celestial Pole mark. Example: The top of a radio tower.

Unlock the Right Ascension and rotate the head around the polar axis – best accomplished by grasping the counterweight shaft. As it turns, watch the movement of the Celestial Pole mark. If it simply rotates and stays on the target object, then the device is perfectly polar aligned. But if it moves away from the target object as the RA is rotate, it is NOT aligned.

When the Celestial Pole mark is rotated until it’s as far away from the starting point as it can get, stop rotating it and lock the RA axis.

Now it’s time to adjust the illuminated polar finder scope. On the scope is a collar with three Allen screws. These screws adjust where the device points.

NOTE: The three-screw system requires tightening one screw and loosening two in order to keep the system tight.

Using the correct Allen wrench, look through the illuminated polar finder then slightly turn a screw – just pick one and start. After determining how that Allen screw affected the illuminated polar finder, try another screw. Through trial and error you will determine which screws need to be turned to move the Celestial Pole toward the target object.

When moving the Celestial Pole marker, only move it half way back to the target object. DO NOT move it all the way back.

With the Celestial Pole mark halfway back, use the azimuth adjustment and altitude adjustment to move the mark the rest of the way back to center it on the target object.

Unlock the RA and spin it around. At the point that it is farthest away from the target object, lock the RA.

Use the Allen screws to move the Celestial Pole marker back HALF WAY back, then finish moving with the azimuth and altitude controls.

Continue this process until the Celestial Pole marker stays in the same place when the RA spins.

The illuminated polar finder is now collimated with the polar axis of the telescope.

 

 

Kent Marts

Customer Service

Explore Scientific

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Timothy Myers via groups.io
Sent: Monday, June 1, 2020 12:25 PM
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Received my new EXOS-2GT #EXOS2 #ExploreStars

 

Bob,

I also found that I could sit in a chair and sighting through the Polar Scope was not a big issue. I ended up making marks on my driveway that helped get the mount close to the same spot each time I use it, and then started using Sharp Caps Polar Alignment tool. I have not had to site through the PA Scope in three or four months, since starting with Sharp Cap. 

I did notice however a couple weeks ago that my Polar Scope had come loose, internally. Had to remove it and tighten things up, which means I need to re-align it. i could easily do that after setting the scope up one evening, but I keep forgetting to do it. Have you done a good alignment of your Polar Scope?
--
Tim Myers

Telescopes:     Celestron 4SE, Celestron 8SE, SkyWatcher 100ED Pro
Mounts:           4-5 SE, 6-8SE, EXOS-2GT with PMC-Eight
Cameras:        ASI1600MC, Cooled
Tablets:           Asus Nexus 7, Amazon Fire 7
Laptop:           Lenovo


--
Kent Marts
Customer Service
Explore Scientific

Gear: Anything in the store!


--
Steven Romero
Location: SE Texas
Mount: EXOS2-GT PMC-8
Scope: ED102 APO


Re: Portable Power and PMC-eight

Jeff Snell
 

Thanks James.  Appreciate the pics and the feedback.

Jeff


On Jun 1, 2020, at 5:03 PM, James Buck <piperjimb@...> wrote:

Jeff,
I've put together a power distribution box that connects to a 12 volt deep cycle battery.
I'm running two laptops one for the mount and guide camera, the other for imaging.

Instead of a power inverter, I purchased from Amazon a 12 volt to 19.7 volt inverter for my laptops.  These adapters are already for 12 volt "cigarette lighter" sockets so all you have to do is plug them in. CAR Charger 90W 65W 45W for HP-Envy-Pavilion Touchsmart-Sleekbook 15 17 M6 M7 Series; Hp Spectre X360, Pro x360 G2; Pavilion X360 EliteBook X360 DC Auto Adapter Power Cord Extra Long 10 Ft. CAR Charger 90W 65W 45W for HP-Envy-Pavilion Touchsmart-Sleekbook 15 17 M6 M7 Series; Hp Spectre X360, Pro x360 G2; Pavilion X360 EliteBook X360 DC Auto Adapter Power Cord Extra Long 10 Ft
Sold by: PWR+ (seller profile) | Product question? Ask Seller
Sold by: PWR+ (seller profile) | Product question? Ask Seller
Attached is a couple of images of what I've done
<IMG_20200328_211734594.jpg>

--

James Buck

Explore Scientific Exos2 PMC-Eight with Bresser 208mm f/3.9
ES 8x50 Finder Scope
Explore1 70mm guide scope
QHY5L-ii Guide Camera
QHY 290M Back Illuminated Cooled Camera
QHY CF3 Color Wheel
Bresser MicrOkular Color HD Planetary imaging camera
FirstLight 102 600mm f/6.47 mounted on Twilight I
Celestron Cometron 76mm f/3 on a Bresser AZ Pro Field Tripod
Pentax 8x20mm, Pentax 20x50mm, Bresser 7x50mm BinoCom


Re: Portable Power and PMC-eight

James Buck
 

Jeff,
I've put together a power distribution box that connects to a 12 volt deep cycle battery.
I'm running two laptops one for the mount and guide camera, the other for imaging.

Instead of a power inverter, I purchased from Amazon a 12 volt to 19.7 volt inverter for my laptops.  These adapters are already for 12 volt "cigarette lighter" sockets so all you have to do is plug them in. CAR Charger 90W 65W 45W for HP-Envy-Pavilion Touchsmart-Sleekbook 15 17 M6 M7 Series; Hp Spectre X360, Pro x360 G2; Pavilion X360 EliteBook X360 DC Auto Adapter Power Cord Extra Long 10 Ft. CAR Charger 90W 65W 45W for HP-Envy-Pavilion Touchsmart-Sleekbook 15 17 M6 M7 Series; Hp Spectre X360, Pro x360 G2; Pavilion X360 EliteBook X360 DC Auto Adapter Power Cord Extra Long 10 Ft
Sold by: PWR+ (seller profile) | Product question? Ask Seller
Sold by: PWR+ (seller profile) | Product question? Ask Seller
Attached is a couple of images of what I've done
--

James Buck

Explore Scientific Exos2 PMC-Eight with Bresser 208mm f/3.9
ES 8x50 Finder Scope
Explore1 70mm guide scope
QHY5L-ii Guide Camera
QHY 290M Back Illuminated Cooled Camera
QHY CF3 Color Wheel
Bresser MicrOkular Color HD Planetary imaging camera
FirstLight 102 600mm f/6.47 mounted on Twilight I
Celestron Cometron 76mm f/3 on a Bresser AZ Pro Field Tripod
Pentax 8x20mm, Pentax 20x50mm, Bresser 7x50mm BinoCom


Re: EXOS2 PMC8 axis movement issue

Chris
 

Fantastic! I'd seen the file referred to on the forum but couldn't find it. I was looking in the wrong file set!

I haven't done the setup yet, but I've been using it for a few hours tonight with no problem, so it may just have been a squiffy wifi connection.

Power isn't a problem at the moment as I'm in my garden hooked up to the mains.

Thanks for the help and once I've got some pictures done I'll post them up for any constructive criticism! 

Chris


Re: Mount Startup Position #ASCOM #EXOS2

nico bers
 

Thanks Jerry and Wes, switching to TCP connection and then back worked, now APT has it at the right place. 

As for the home feature in POTH Setup, I go to APT—> Gear —> shift click connect telescope —> POTH Hub—> properties—> Home
Here is what it looks like:
Thank you,
Nico 

On Jun 1, 2020, at 9:00 AM, Wes Mcdonald <wesmcd6@...> wrote:


Nico:

No do not upgrade to the newer ASCOM.  There have been people who have that  reported issues.  Stick with the older version.  It works fine.

If you are at polar home, with the screen as shown, then you are at polar home.  If the arrows are not aligned it is because?  Maybe you were  not to start with?  Or more likely the HOME/PARK thing is confusing you.  Remember the PARK position can be changed, the HOME position is at polar home.  I have not changed my PARK position away from polar home.  Heck, I don't even know how.  

1.  When you say you used POTH "home" what did you do?  POTH only has a PARK button.  If you meant you used PARK then perhaps the PARK position has bee redefined.  If you meant "home please tell me how you did that.

2.  Before you do anything else, try using the APT "PARK" button and see where the mount goes.

Wes.


2.    

--
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired


Re: Portable Power and PMC-eight

Jeff Snell
 

Copy!

Jeff

PMC-Eight w/Explore Stars
ES ED80mm APO
Celestron 8" Edge HD
Canon Ti-5 w/ Spencer Camera Astro-mod


On Mon, Jun 1, 2020 at 3:22 PM Jim Norwood <J.Norwood@...> wrote:
I prefer AGM batteries. They're still lead-acid though, so always keep it charged and only use the top 50% of it's capacity (or less if possible). 

Jim


Re: Portable Power and PMC-eight

Jim Norwood
 

I prefer AGM batteries. They're still lead-acid though, so always keep it charged and only use the top 50% of it's capacity (or less if possible). 

Jim


Re: Couple questions about the EXOS2-GT PMC8 #EXOS2 #ExploreStars

Tony
 

Hi All -

It took a good bit longer than I was hoping for he skies to finally clear up, but I managed to get out for a couple hours last night.  Despite the strong gusts and sporadic cloud cover, I was able to gain some familiarity with  the new mount and scope.

Sharp Cap was a breeze for polar alignment.  I'll never unscrew a polar scope cap again.
Even with a near perfectly level mount, and aligning the index markers, the go-tos were still quite a ways off, even after syncing.
Plate solving was truly life changing.  Close is good enough.  No need for alignment stars.  Worked incredibly well 90% of the time.
Guide wise, even on a bum calibration (too close to the NCP) PHD was guiding between .2 and .5 arc sec so long as there was no wind.  As soon as a gust came, it bumped up to 1.5 to 2 or even more.  Honestly, I normally wouldnt have gone out in such wind, but I was getting desperate with the poor conditions lately.
The mount did crash the OTA into the tripod on one occasion.  I was quick to shut it down.  Really not quite sure why or how it happened.  I did have a couple programs crash on the underpowered laptop, so that might have affected it, but I dont believe POTH ever faltered, which I assume was keeping track of the mounts location.  With more practice, hopefully I can isolate the cause.

Thanks for all the help and suggestions guys, the new setup shows a lot of promise.  Cant wait for some better conditions.


Re: Received my new EXOS-2GT #EXOS2 #ExploreStars

Kent Marts- Explore Scientific Customer Service
 

Tim,

 

Here’s a draft document I’ve written.

 

DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT      DRAFT     

 

EXOS2GT POLAR FINDER ALIGNMENT PROCESS

This process outlines how to align the illuminated polar finder scope (SKU PFEXOS2) found in the polar axis with the polar axis of the EXOS2GT mount, whether or not the mount comes with the PMC-Eight motion control system.

To get a close polar alignment, the polar finder scope must be aligned with the polar axis.

 

THE PROCESS

This process is easiest to do without a telescope or the counterweights installed. Leave the counterweight shaft attached because it makes a good handle at a certain point.

With the EXOS2GT tripod set up outside, orient the polar axis with a fixed that is as far away as you can see – a telephone pole, a radio antenna on top of a mount, a prominent tree: Miles is better than 500 yards.

Adjust the tripod height so that when the polar axis is lowered to align with the target object the illuminated polar finder eyepiece is in a comfortable viewing position. Usually this is done while seated.

Remove the polar finder scope eyepiece cover and the screw-in port cover. Rotate the declination axis 90 degrees to open the internal viewing port.

Use the azimuth knobs and altitude control to adjust the polar axis until you can see the prominent object you selected in the illuminated polar scope.

The center of the illuminated polar finder scope is marked by a cross. That marks the Celestial Pole.

Make fine adjustment to the azimuth and altitude to get a specific part of the target object lined up with the Celestial Pole mark. Example: The top of a radio tower.

Unlock the Right Ascension and rotate the head around the polar axis – best accomplished by grasping the counterweight shaft. As it turns, watch the movement of the Celestial Pole mark. If it simply rotates and stays on the target object, then the device is perfectly polar aligned. But if it moves away from the target object as the RA is rotate, it is NOT aligned.

When the Celestial Pole mark is rotated until it’s as far away from the starting point as it can get, stop rotating it and lock the RA axis.

Now it’s time to adjust the illuminated polar finder scope. On the scope is a collar with three Allen screws. These screws adjust where the device points.

NOTE: The three-screw system requires tightening one screw and loosening two in order to keep the system tight.

Using the correct Allen wrench, look through the illuminated polar finder then slightly turn a screw – just pick one and start. After determining how that Allen screw affected the illuminated polar finder, try another screw. Through trial and error you will determine which screws need to be turned to move the Celestial Pole toward the target object.

When moving the Celestial Pole marker, only move it half way back to the target object. DO NOT move it all the way back.

With the Celestial Pole mark halfway back, use the azimuth adjustment and altitude adjustment to move the mark the rest of the way back to center it on the target object.

Unlock the RA and spin it around. At the point that it is farthest away from the target object, lock the RA.

Use the Allen screws to move the Celestial Pole marker back HALF WAY back, then finish moving with the azimuth and altitude controls.

Continue this process until the Celestial Pole marker stays in the same place when the RA spins.

The illuminated polar finder is now collimated with the polar axis of the telescope.

 

 

Kent Marts

Customer Service

Explore Scientific

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Timothy Myers via groups.io
Sent: Monday, June 1, 2020 12:25 PM
To: MAIN@ESPMC-Eight.groups.io
Subject: Re: [ESPMC-Eight] Received my new EXOS-2GT #EXOS2 #ExploreStars

 

Bob,

I also found that I could sit in a chair and sighting through the Polar Scope was not a big issue. I ended up making marks on my driveway that helped get the mount close to the same spot each time I use it, and then started using Sharp Caps Polar Alignment tool. I have not had to site through the PA Scope in three or four months, since starting with Sharp Cap. 

I did notice however a couple weeks ago that my Polar Scope had come loose, internally. Had to remove it and tighten things up, which means I need to re-align it. i could easily do that after setting the scope up one evening, but I keep forgetting to do it. Have you done a good alignment of your Polar Scope?
--
Tim Myers

Telescopes:     Celestron 4SE, Celestron 8SE, SkyWatcher 100ED Pro
Mounts:           4-5 SE, 6-8SE, EXOS-2GT with PMC-Eight
Cameras:        ASI1600MC, Cooled
Tablets:           Asus Nexus 7, Amazon Fire 7
Laptop:           Lenovo


--
Kent Marts
Customer Service
Explore Scientific

Gear: Anything in the store!


Kent Marts- Explore Scientific Customer Service
 

Please contact Bresser customer support via https://www.bresser.de/c/en/support/

 

Kent Marts

Customer Service

 

From: MAIN@ESPMC-Eight.groups.io <MAIN@ESPMC-Eight.groups.io> On Behalf Of Stephen Vickers - Explore Scientific Software Developer via groups.io
Sent: Monday, June 1, 2020 9:19 AM
To: MAIN@espmc-eight.groups.io
Subject: Re: [ESPMC-Eight] Battery pack #astrophotography #iexos-100 #TECHNICAL

 

That I do not know. Kent Marks might be able to help more with that.


Thanks,
Stephen Vickers

Explore Scientific
1010 S. 48th Street
Springdale, AR 72762

m. 870.654.6995
d.  479.347.2963 
stephen.vickers@...

 

 



On Jun 1, 2020, at 9:15 AM, Koen M. via groups.io <koen.molemans@...> wrote:

 

Hi, Stephen,
Looks nice, but is it also available in Europe somewhere? 

If i would order it from your site shipping and import taxes almost double that amount...

 


--
Kent Marts
Customer Service
Explore Scientific

Gear: Anything in the store!


Re: Portable Power and PMC-eight

Jeff Snell
 

Wes/Jim,
Thanks for the feedback.  I am looking at an AGM deep cycle as well.  A bit more expensive but closed/sealed ("spill proof") quicker charging, less maintenance etc.  Guess I'll give it a go!
 
Jeff

PMC-Eight w/ExploreStars 
EXOS-2GT
Lenovo Thinkpad (Serial)
ES ED80mm APO
Celestron 8" Edge HD Alt/Az
Canon Ti-5 w/Spencer Camera Astro-mod
Orion Starshoot AutoGuider w/50mm Guidescope
CdC, PhD2, APT, POTH Hub, QHY Polemaster


On Mon, Jun 1, 2020 at 2:10 PM Wes Mcdonald <wesmcd6@...> wrote:
WEll Jeff your milage may vary.  It looks ok to me.  

I run my PMC8 from a deep discharge Marine battery.  I have various DC hookups, always fused.  I run the PMC8 direct off the battery through one of these.  I also power my dew heaters.

I also run my Camera laptop, and focuser via a power inverter.  The inverter is powered by my marine battery.  these run at 120.

I would say your power brick that came with the PMC8 will be fine. But you might want to not use the inverter as it is one more lossy device.  But I do it.  

But of course this is all your risk.
Wes.


--
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired


Re: Portable Power and PMC-eight

Wes Mcdonald
 

WEll Jeff your milage may vary.  It looks ok to me.  

I run my PMC8 from a deep discharge Marine battery.  I have various DC hookups, always fused.  I run the PMC8 direct off the battery through one of these.  I also power my dew heaters.

I also run my Camera laptop, and focuser via a power inverter.  The inverter is powered by my marine battery.  these run at 120.

I would say your power brick that came with the PMC8 will be fine. But you might want to not use the inverter as it is one more lossy device.  But I do it.  

But of course this is all your risk.
Wes.


--
Wes, Southport NC
PMC-8, ES ED 127, 10" LX200GPS, Astro-Tech 8" Newt, ETX-90
Polemaster, Orion ST-80 and SAG
Electrical Engineer, Retired


Re: Portable Power and PMC-eight

Jim Norwood
 

Using a 12v battery with an inverter plugged into it is what I run mine with as well. My iEXOS-100 runs off a 12v input, so I use a 12v 5A power supply plugged into the inverter. You should have adequate power with a big battery like that. Just make sure you don't draw it down too much, as that is very bad for lead-acid batteries. I try to never let mine read below 12.0v with no load. That relates to about a 50% drawdown. 

Jim


Portable Power and PMC-eight

Jeff Snell
 

Folks,
I'm putting together a portable power pack for my astro gear and I wanna make sure I won't fry the PMC eight (or anything else for that matter).

I've seen a few solutions on the web that involve less money but more elaborate technical solutions for a direct DC to DC power source.

I am looking at a different approach that is a bit more expensive but sounds reasonable.  I want to use a deep cycle marine battery EverStart Maxx-29DC (114aH) and an EverStart Maxx 1500W Power Inverter.  Three AC outlets on the inverter for all my gear (minus camera which I'll leave on battery pack).  I plan to run my laptop (small Lenovo), my PMC-eight, and a USB hub. I did the math on the power burn at 12 hours (2x six-hour imaging sessions) and it looks good with114 aH with some to spare.

This seems simple enough but the devil is in the details. Does it look like I'm gonna fry the PMC-eight with this setup?

Thanks,
Jeff

PMC-Eight w/ExploreStars 
EXOS-2GT
Lenovo Thinkpad (Serial)
ES ED80mm APO
Celestron 8" Edge HD Alt/Az
Canon Ti-5 w/Spencer Camera Astro-mod
Orion Starshoot AutoGuider w/50mm Guidescope
CdC, PhD2, APT, POTH Hub, QHY Polemaster


Re: Received my new EXOS-2GT #EXOS2 #ExploreStars

Timothy Myers
 

Bob,

I also found that I could sit in a chair and sighting through the Polar Scope was not a big issue. I ended up making marks on my driveway that helped get the mount close to the same spot each time I use it, and then started using Sharp Caps Polar Alignment tool. I have not had to site through the PA Scope in three or four months, since starting with Sharp Cap. 

I did notice however a couple weeks ago that my Polar Scope had come loose, internally. Had to remove it and tighten things up, which means I need to re-align it. i could easily do that after setting the scope up one evening, but I keep forgetting to do it. Have you done a good alignment of your Polar Scope?
--
Tim Myers

Telescopes:     Celestron 4SE, Celestron 8SE, SkyWatcher 100ED Pro
Mounts:           4-5 SE, 6-8SE, EXOS-2GT with PMC-Eight
Cameras:        ASI1600MC, Cooled
Tablets:           Asus Nexus 7, Amazon Fire 7
Laptop:           Lenovo


Stephen Vickers - Explore Scientific Software Developer <stephen.vickers@...>
 

That I do not know. Kent Marks might be able to help more with that.

Thanks,
Stephen Vickers

Explore Scientific
1010 S. 48th Street
Springdale, AR 72762

m. 870.654.6995
d.  479.347.2963 
stephen.vickers@...



On Jun 1, 2020, at 9:15 AM, Koen M. via groups.io <koen.molemans@...> wrote:

Hi, Stephen,
Looks nice, but is it also available in Europe somewhere? 

If i would order it from your site shipping and import taxes almost double that amount...


Koen M.
 

Hi, Stephen,
Looks nice, but is it also available in Europe somewhere? 

If i would order it from your site shipping and import taxes almost double that amount...


Stephen Vickers - Explore Scientific Software Developer <stephen.vickers@...>
 

Koen,
ES Sells one that works for that.

On Jun 1, 2020, at 9:09 AM, Koen M. via groups.io <koen.molemans@...> wrote:

Hi,

So at this moment my iEXOS-100 is running on the 8 C-battery's
However i am wondering if there is a possibility to change that to a power bank or something other compact and rechargable.
If a power bank is an option what type of powerbank would be a good one (because it needs 12v if i am not mistaking and as far as i know all my power bank's are 5v output)
Why i want to change to alternative power: you know, battery's and nature....
In my opinion this is something where the creators of the iEXOS took a wrong turn and they should have made a build in rechargable battery or something



Koen M.
 

Hi,

So at this moment my iEXOS-100 is running on the 8 C-battery's
However i am wondering if there is a possibility to change that to a power bank or something other compact and rechargable.
If a power bank is an option what type of powerbank would be a good one (because it needs 12v if i am not mistaking and as far as i know all my power bank's are 5v output)
Why i want to change to alternative power: you know, battery's and nature....
In my opinion this is something where the creators of the iEXOS took a wrong turn and they should have made a build in rechargable battery or something

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