Date   

Re: Mach2 RA problem

Tim Morrill
 

Will do. 

Thank again Roland!



Re: Mach2 RA problem

Roland Christen
 

Yes, we can send you another set of cables. I will alert the office on Monday. Meanwhile make sure that both cables are securely seated all the way into the connectors. I would also mark which cable was the RA (before you switched), maybe with a piece of tape so that you can replace that one with a new one. Then if you send it back, we can analyze it to see what may have gone wrong.

Roland



-----Original Message-----
From: Tim Morrill via groups.io <helo4@...>
To: main@ap-gto.groups.io
Sent: Sat, May 22, 2021 4:53 pm
Subject: Re: [ap-gto] Mach2 RA problem

On Sat, May 22, 2021 at 04:35 PM, Roland Christen wrote:
Roland
Thanks for the quick reply Roland.

After switching the cables as you advised the problem has gone away! Seems to be running great now.
Do you think it would be a good idea to order another set of cables just in case one of these is going bad?

Tim




--
Roland Christen
Astro-Physics


Re: Mach2 RA problem

Tim Morrill
 

On Sat, May 22, 2021 at 04:35 PM, Roland Christen wrote:
Roland
Thanks for the quick reply Roland.

After switching the cables as you advised the problem has gone away! Seems to be running great now.
Do you think it would be a good idea to order another set of cables just in case one of these is going bad?

Tim




Re: Mach2 RA problem

Roland Christen
 

There are no gears grinding.

It sounds like the stepper motor in RA has lost connection to one of the phases and is trying to run on a single phase (this will do no harm to the motor or mount, it just sounds bad). Bad connection could be in the the cable between CP5 and mount. Try switching the two cables. Take the RA cable and pug it into the Dec on the CP5 and mount and take the Dec cable and plug it into the RA CP5 and mount. If the cable has a broken connection the problem will move over to the Dec side.

Roland



-----Original Message-----
From: Tim Morrill via groups.io <helo4@...>
To: main@ap-gto.groups.io
Sent: Sat, May 22, 2021 4:23 pm
Subject: [ap-gto] Mach2 RA problem

Hello I’ve had the Macy to for quite some time now and I’ve been enjoying it quite a lot! It has been performing perfectly. Except last night I went to image a object and it slewed way off target and acted like it was lost. I tried to home the amount but kept coming up with a communication error. And also for the park itself. 
So I went out today to see if I could figure out what was going on and after powering on the mount and energizing the motors it makes a very loud clicking noise in the RA area. And when I’m trying to move the RA there is very loud gear grinding noise… So I just stopped and shut it off immediately. 
Any idea what could have happened? And how to fix it? It’s been sitting in the observatory and nothing has changed.

I will attempt to upload a video so that you can hear the noise. 

Thanks 
Tim Morrill.

--
Roland Christen
Astro-Physics


Mach2 RA problem

Tim Morrill
 
Edited

Hello I’ve had the Mach2 for quite some time now and I’ve been enjoying it quite a lot! It has been performing perfectly. Except last night I went to image a object and it slewed way off target and acted like it was lost. I tried to home the amount but kept coming up with a communication error. And also for the park itself. 

So I went out today to see if I could figure out what was going on and after powering on the mount and energizing the motors it makes a very loud clicking noise in the RA area. And when I’m trying to move the RA there is very loud gear grinding noise… So I just stopped and shut it off immediately. 

Any idea what could have happened? And how to fix it? It’s been sitting in the observatory and nothing has changed.

I will attempt to upload a video so that you can hear the noise. 


Thanks 

Tim Morrill.


Re: NGC 6357 The Lobster Nebula with 1100GTO-AE

Don Anderson
 

Beautiful image with amazing detail Jian! 

Don Anderson


On Friday, May 21, 2021, 10:59:53 a.m. MDT, jypeng@... <jypeng@...> wrote:


Hello,
Recently, I acquired the NGC6357 (declination 34 south) from my backyard (declination 37 north) using my new AP 1100GTO-AE for 20 minutes subframes in the light-polluted area. It performed excellently during the sequences from 2 AM ~ 5 AM at 15~17 degrees above the horizon when I was asleep. It is an amazing telescope mount!
It is uploaded to Astrobin https://www.astrobin.com/ipp2wk/
Hope you like it.
Thanks,
Jian Yuan Peng


Re: NGC 6357 The Lobster Nebula with 1100GTO-AE

jypeng@...
 

Karen, Roberto, Rolando, Kenneth, Jeff, Lee
Thank you for your kind comments!
1100GTO is an excellent telescope mount and I am a happy owner. :-)
Regards,
Jian Yuan Peng


Re: NGC 6357 The Lobster Nebula with 1100GTO-AE

Lee Dodge
 

Spectacular picture!

Lee


Re: MGBox V2 mounting?

Jeffc
 

> I have my MGBoxV2 mounted at the top of the observatory walls,

That makes sense.   

I'm just wondering if there is significant temperature and humidity change at localized heights.
I sorta feel like humidity varies even within just a few feet of the ground.
Also, I'm not even sure how much humidity affects the pointing model.

In an observatory I suspect the environment is a bit more consistent.

I'm out in the open.   The computer is mounted on the pier... tho there's a USB hub on the OTA.   
Right now I have MGBoxV2 on the OTA which is kinda convenient to keep it out of the way.

image.png

On Fri, May 21, 2021 at 8:20 PM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
Jeff

I was not sure what the GPS would do as far as acquiring signals as the mount slews, so I have my MGBoxV2 mounted at the top of the observatory walls, i.e. immobile.  The PC is also not on the OTA, so the SUB connection is easy.  If you have a PC (NUC, mini-PC, ASAIR) on the OTA, then your situation is different.

Bryan


Re: Should I use my BARADV for the upcoming lunar eclipse?

Worsel
 

Nice moon image, Mike...very sharp!

Bryan


Re: MGBox V2 mounting?

Worsel
 

Jeff

I was not sure what the GPS would do as far as acquiring signals as the mount slews, so I have my MGBoxV2 mounted at the top of the observatory walls, i.e. immobile.  The PC is also not on the OTA, so the SUB connection is easy.  If you have a PC (NUC, mini-PC, ASAIR) on the OTA, then your situation is different.

Bryan


MGBox V2 mounting?

Jeffc
 

I recently picked up a MGBox V2 for use with APCC/APPM, and hopefully to automate setting the location using the MGBox GPS.

Considering the environmental data such as temp and humidity, should I mount the MGBox on the OTA (along with the pegasus powerbox and use that USB hub for the connectivity)?

Or is it ok to mount this anywhere around the mount, e.g. on the tripod?
And presumably away from anything that will change the temperature like a computer fan.
If down below, I would use one of the USB ports on the computer.

thx

-jeff


Re: Should I use my BARADV for the upcoming lunar eclipse?

Mike Dodd
 

On 5/21/2021 9:36 PM, Mike Dodd wrote:
Most lunar imagers use "lucky imaging" on the Moon and planets. This
uses software like SharpCapture to make a "movie" at 20-60 frames per
second, then AutoStakkert to sort through the frames and choose the best
ones, and stack them into one image. Registax can sharpen the image.
This is one of my lunar images acquired as described: <http://astronomy.mdodd.com/moon-02.html> Note that the individual exposures were only 1.5 milliseconds -- the Moon is very bright. Details are listed below the image, with links to the specialized software.

When I wrote "SharpCapture" in my message above, I meant to write "FireCapture" which is an improvement, and is free.

I'm not an expert in "lucky imaging" but I'm pleased with this image.

--- Mike


Re: Should I use my BARADV for the upcoming lunar eclipse?

Mike Dodd
 

On 5/21/2021 8:55 PM, Nick Iversen wrote:
Does the answer to this question differ if I am
imaging the moon at first quarter (fine crater details) or a globular
cluster? I'd really like to know the mathematics involved.
Can't help you with the math, but AFAIK, the more pixels your target covers, the better it will be. It will indeed have higher resolution.

Take it to an extreme: Would you want a 1-degree-wide image to fall on a sensor having 100x100 pixels, or one having 5000x5000 pixels?

--- Mike


Re: Should I use my BARADV for the upcoming lunar eclipse?

Mike Dodd
 

On 5/21/2021 8:55 PM, Nick Iversen wrote:
I have a 130GTX and a camera with pixel size 3.76um. Is there any
advantage to using a BARADV to double the size of the lunar image on the
sensor? It won't increase the resolution (right?)
Incorrect. The resolution is the number of pixels within the image, so if the image on the sensor grows by 2X, you have doubled the number of pixels in both directions.

Suppose Mare Imbrium covers a square of 500x500 pixels now, and suppose a crater within it covers 30x30 pixels. Now double the image size to cover 1000x1000 pixels, and the crater now covers 60x60 pixels. Detail that might be lost or fuzzy in the 30x30 area might become visible or sharper in the 60x60 area.

Does that make sense?

But it will increase the exposure required and amplify
any tracking errors.
Moon exposure should be super-short, and not require guiding at all (what would you guide on?).

Most lunar imagers use "lucky imaging" on the Moon and planets. This uses software like SharpCapture to make a "movie" at 20-60 frames per second, then AutoStakkert to sort through the frames and choose the best ones, and stack them into one image. Registax can sharpen the image.

You can get a lunar image with a single quick exposure, but portions of it will be distorted or out of focus because of atmosphere movement.

Lunar and planetary imaging is completely different than deep-space imaging.

Hope this helps.

--- Mike


Should I use my BARADV for the upcoming lunar eclipse?

Nick Iversen
 

I have a 130GTX and a camera with pixel size 3.76um. Is there any advantage to using a BARADV to double the size of the lunar image on the sensor? It won't increase the resolution (right?) because that depends on the aperture. But it will increase the exposure required and amplify any tracking errors. Does the answer to this question differ if I am imaging the moon at first quarter (fine crater details) or a globular cluster? I'd really like to know the mathematics involved.


Re: Ethernet Control of AP1100 Mount

Worsel
 

Version history suggests the IP address was added at least as far back as Sep 2018

Bryan


Re: Did the design of the 900GTO or SPA change at some point, so the RPA is not essential?

Robert Berta
 

For remote imaging I use a Meade Giant Field tripod. Originally with my 900 GTO I just drilled and taped holes to attach the mount directly on the flat top of the Meade. Used it that way for years. I than added a 1100 GTO for home observatory use but got the AP flat adaptor for both the Pier and another one for the Meade tripod. In both cases they look nice work well but frankly both worked fine just bolting to the top of the Meade tripod. I think many buy the rotating adaptor thinking that it will give more range of adjustment...it doesn't. Later I machined a cap for use on the Meade tripod that allows additional adjustment of about 15 more degrees in addition to the stock range of adjustment of the mounts.....I have my one metal lathe and milling machine. While it was a fun experiment.....it wasn't necessary frankly. 


Re: NGC 6357 The Lobster Nebula with 1100GTO-AE

Jeff B
 

Oh my that's just beautiful...squared.  Three dimensional!

Well done!!

Jeff

On Fri, May 21, 2021 at 3:00 PM Karen Christen <karen@...> wrote:

What a striking result!  And the Astrobin IOTD today…  Congrats!

Karen

AP

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of jypeng@...
Sent: Friday, May 21, 2021 11:57 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] NGC 6357 The Lobster Nebula with 1100GTO-AE

 

Hello,
Recently, I acquired the NGC6357 (declination 34 south) from my backyard (declination 37 north) using my new AP 1100GTO-AE for 20 minutes subframes in the light-polluted area. It performed excellently during the sequences from 2 AM ~ 5 AM at 15~17 degrees above the horizon when I was asleep. It is an amazing telescope mount!
It is uploaded to Astrobin https://www.astrobin.com/ipp2wk/
Hope you like it.
Thanks,
Jian Yuan Peng


--
Karen Christen
Astro-Physics


Re: Southern Owl Planetary nebula

Robert Berta
 

Excellent photo of a rarely photographed object. VERY nice.

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