Date   

Re: Absolute Encoders and Running a Pointing Model

 

Thanks Bill

our plan is unguided imaging on the CDK17 down at el sauce, so i'm banking on ae/appc. we are aware that it may not work out, so guiding is our plan b

On Sun, Apr 19, 2020 at 9:07 AM Bill Long <bill@...> wrote:
Yeah, guiding can make things better. In some cases, you cant guide (i.e. no good guide star available on the chip) and the APCC/APPM model with the encoders can save the project.

Like this one:


Shot completely unguided using APCC/APPM, 1100AE, on 10" iDK scope. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Christopher Erickson <christopher.k.erickson@...>
Sent: Saturday, April 18, 2020 10:27 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Absolute Encoders and Running a Pointing Model
 
Abs encoders can't compensate for OTA flexure, mirror-flop, etc., however a good pointing model might help a bit with those.

In a nutshell...

Guiding is like bacon. It makes everything better.


On Sat, Apr 18, 2020 at 7:07 PM Brian Valente <bvalente@...> wrote:
just out of curiosity with encoders, do you feel a need to guide?

On Sat, Apr 18, 2020 at 9:53 PM Tony Benjamin <tonybenjamin@...> wrote:
Thanks Christopher. I just installed them and they show a nice improvement in PHD2 :)



--
Brian 



Brian Valente



--
Brian 



Brian Valente


Re: Absolute Encoders and Running a Pointing Model

Bill Long
 

Yeah, guiding can make things better. In some cases, you cant guide (i.e. no good guide star available on the chip) and the APCC/APPM model with the encoders can save the project.

Like this one:


Shot completely unguided using APCC/APPM, 1100AE, on 10" iDK scope. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Christopher Erickson <christopher.k.erickson@...>
Sent: Saturday, April 18, 2020 10:27 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Absolute Encoders and Running a Pointing Model
 
Abs encoders can't compensate for OTA flexure, mirror-flop, etc., however a good pointing model might help a bit with those.

In a nutshell...

Guiding is like bacon. It makes everything better.


On Sat, Apr 18, 2020 at 7:07 PM Brian Valente <bvalente@...> wrote:
just out of curiosity with encoders, do you feel a need to guide?

On Sat, Apr 18, 2020 at 9:53 PM Tony Benjamin <tonybenjamin@...> wrote:
Thanks Christopher. I just installed them and they show a nice improvement in PHD2 :)



--
Brian 



Brian Valente


Re: Case Foam CUTTING PATTERNS for AP Mounts

Eric Baumgartner
 

Hi, Terri:

 

I also use My Case Builder for custom-foam-lined cases for small mounts and small telescopes, and their online user interface is second to none. It’s a fun mental exercise to jockey equipment pieces around to maximize content and protection in a case of a given size.

 

My first-gen Mach1 is transported in a Pelican 1620 case. The case accommodates everything related to the mount except the counterweights. I carry the counterweights in a Bucket Boss Gatemouth canvas bag, with pieces of foam in between each weight to prevent them from banging around. Works well.

 

Eggcrate foam is open cell and much to squishy to afford much protection for heavy gear. Closed-cell foam, also known as Ethafoam, is the way go to.

 

Hope this helps,


Eric Baumgartner

Redding, CT USA

 

 

 

From: Astro-Physics GTO users group <main@ap-gto.groups.io> on behalf of Terri Zittritsch <theresamarie11@...>
Reply-To: Astro-Physics GTO users group <main@ap-gto.groups.io>
Date: Saturday, April 18, 2020 at 9:19 AM
To: Astro-Physics GTO users group <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Case Foam CUTTING PATTERNS for AP Mounts

 

I used mycasebuilder.com for my Mach1 case. Couldn't be happier. I designed it on their web based software. Works perfect and space is maximized for the size of the case. I took a picture of the profile of my mount and traced the outline using their software. Careful measuring is needed to check and verify the pattern but totally worth it.CheersDan


That's a beautiful job Dan!    Having a new Mach2, I'd like to have a case for it.     I purchased a pelican 1600 case, with the eggcrate foam, but the foam is so soft my guess is the whole thing will fall apart in no time, so I returned it.    

I like your process and may give it a go at some point.    

I personally wouldn't worry about the altitude setting needing to be different for everyone, and would prioritize setting the altitude so everything fit best first.   That is for a standard foam cutout pattern.   Resetting the altitude when I put it back on the tripod isn't that big a deal.   Since i'm portable, it needs to be reset when traveling anyway.    My biggest concern with the mach2, is where to put the counterweight bar, it is very substantial and will need some good padding to keep anything around it safe, or its own case.

Can I ask what everyone does with their weights?    Do you put them in their own boxes for traveling?

Terri


Re: Absolute Encoders and Running a Pointing Model

Christopher Erickson
 

Abs encoders can't compensate for OTA flexure, mirror-flop, etc., however a good pointing model might help a bit with those.

In a nutshell...

Guiding is like bacon. It makes everything better.


On Sat, Apr 18, 2020 at 7:07 PM Brian Valente <bvalente@...> wrote:
just out of curiosity with encoders, do you feel a need to guide?

On Sat, Apr 18, 2020 at 9:53 PM Tony Benjamin <tonybenjamin@...> wrote:
Thanks Christopher. I just installed them and they show a nice improvement in PHD2 :)



--
Brian 



Brian Valente


Re: Absolute Encoders and Running a Pointing Model

 

just out of curiosity with encoders, do you feel a need to guide?


On Sat, Apr 18, 2020 at 9:53 PM Tony Benjamin <tonybenjamin@...> wrote:
Thanks Christopher. I just installed them and they show a nice improvement in PHD2 :)



--
Brian 



Brian Valente


Re: Absolute Encoders and Running a Pointing Model

Tony Benjamin <tonybenjamin@...>
 

Thanks Christopher. I just installed them and they show a nice improvement in PHD2 :)


Re: Absolute Encoders and Running a Pointing Model

Christopher Erickson
 

ALWAYS leave the abs encoders on. NEVER turn them off.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Sat, Apr 18, 2020, 6:48 PM Tony Benjamin <tonybenjamin@...> wrote:
Do I leave the AE's on when creating a pointing model?


Absolute Encoders and Running a Pointing Model

Tony Benjamin <tonybenjamin@...>
 

Do I leave the AE's on when creating a pointing model?


Re: Keypad time loss

Mike Dodd
 

On 4/18/2020 8:45 PM, Steve salvo via groups.io wrote:
Good Evening from Cloudy Florida,

I have the newer version of the Keypad with the updated software. The
keypad seems to be losing time, not much, a couple of minutes within the
past few months. Causes?
The time base crystal probably isn't precisely on-frequency. Typically quartz clocks aren't specified to be more accurate than about one minute per month. If my math is correct, that's 0.002% accuracy.

Can you connect your mount to a computer that's synced to an Internet time server? That would synchronize the clock, so the next time you used the keypad, it would have an accurate time.

--- Mike


Keypad time loss

Steve Salvo
 

Good Evening  from Cloudy Florida,

I have the newer version of the Keypad with the updated software.  The keypad seems to be losing time, not much, a couple of minutes within the past few months.  Causes?

Thanks
Steve


Re: Case Foam CUTTING PATTERNS for AP Mounts

Terri Zittritsch
 

I used mycasebuilder.com for my Mach1 case. Couldn't be happier. I designed it on their web based software. Works perfect and space is maximized for the size of the case. I took a picture of the profile of my mount and traced the outline using their software. Careful measuring is needed to check and verify the pattern but totally worth it.CheersDan

That's a beautiful job Dan!    Having a new Mach2, I'd like to have a case for it.     I purchased a pelican 1600 case, with the eggcrate foam, but the foam is so soft my guess is the whole thing will fall apart in no time, so I returned it.    

I like your process and may give it a go at some point.    

I personally wouldn't worry about the altitude setting needing to be different for everyone, and would prioritize setting the altitude so everything fit best first.   That is for a standard foam cutout pattern.   Resetting the altitude when I put it back on the tripod isn't that big a deal.   Since i'm portable, it needs to be reset when traveling anyway.    My biggest concern with the mach2, is where to put the counterweight bar, it is very substantial and will need some good padding to keep anything around it safe, or its own case.

Can I ask what everyone does with their weights?    Do you put them in their own boxes for traveling?

Terri


Re: Mach2 Notification Question

Elenillor
 

Two weeks seems standard in my experience. 

Back in 1998 I got a hint (following thing on the old SAA usergroup) my time might be up on the AP130 list when I was scheduled for an overseas trip.  I sent an email to AP that I would accept if I was was notified while out of the country.  Turns out I was able to get the email notification while I was in England and made a call from there to accept and give a CC number down payment.  A similar thing happened on my Mach1 while traveling in Japan.  A couple of years ago I was off to Nepal for a three week trek and notifications were starting up for the Stowaway and Mak-Cass.  I sent a preemptive email about the Stowaway (declined as I got a Sky90 in 2006 and TEC AP110 a little later to scratch the small quality refractor itch).  I indicated I would accept the Mak-Cass if my name came up, however it did not.  Although I did get notified on the Mak-Cass a year after the trek and was asked to respond promply.  I accepted an hour or two after the email was sent and just love using the scope as it fits my observing stye preciely. 


Re: Mach2 Notification Question

David
 

Last time I was notified it was about a two week window, thats it.

David



On Apr 17, 2020, at 7:55 PM, Larry Phillips <llp41astro@...> wrote:

OK. But how many days would that be?  I will be off the grid for a while soon and it would be my luck that my notice came and expired while I was gone.
Larry


Re: Mach2 Notification Question

Larry Phillips
 

OK. But how many days would that be?  I will be off the grid for a while soon and it would be my luck that my notice came and expired while I was gone.
Larry


Re: Case Foam CUTTING PATTERNS for AP Mounts

dang.astro
 

I used mycasebuilder.com for my Mach1 case. Couldn't be happier. I designed it on their web based software. Works perfect and space is maximized for the size of the case. I took a picture of the profile of my mount and traced the outline using their software. Careful measuring is needed to check and verify the pattern but totally worth it.

Cheers
Dan




Re: Mach2 Notification Question

dvjbaja
 

A response by "X" date would be in the email or letter you receive. 

jg

On Fri, Apr 17, 2020 at 1:51 PM Larry Phillips <llp41astro@...> wrote:
When a person is notified that they are eligible to purchase a Mach2, how long do they have to reply?
Larry


Mach2 Notification Question

Larry Phillips
 

When a person is notified that they are eligible to purchase a Mach2, how long do they have to reply?
Larry


Re: Mach2 quick update

Dean Jacobsen
 

On Fri, Apr 10, 2020 at 08:24 AM, uncarollo2 <chris1011@...> wrote:
Hi Astronuts,
 
Just a quick update on the progress of Mach2 mounts. We are still working at AP to get mounts out the door. Although the factory itself is shut down for now, we have a number of employees working at home assembling parts and sub-assemblies for the mounts. Fortunately our suppliers are still able to ship parts such as motors, bearings, gears, fasteners, so we are in good shape there. I'm doing all the final assemblies and testing, which is coming right along. We should be able to ship more out in the coming week, so please be patient.
 
Meanwhile I am also testing the mounts under real sky conditions with a fairly big scope and camera so I can make some guidelines on the best way to do guided and unguided imaging. More on that later.
 
Roland Christen
Astro-Physics Inc.
These quick updates are greatly appreciated.  I'm sure that I'm not the only one who would appreciate a quick note as to how things are going whenever you have time.
 
--
Dean Jacobsen
http://astrophoto.net/wp/ 
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: RAPAS on Mach2

Mike Shade
 

Thanks...the old method of drifting is a major pain but seems to work well for me and my setup.  It seems to change ever so slightly over the year, likely metal heat cycling in the AZ summer heat.  The PW 17 is a workhorse, when I check polar alignment I also check collimation.  That seems to hold pretty well, haven't had to tweak in a bit.  I also have AP scopes as well, those are cycle off and on of my old 1200GTO.

 

Curious as to where you were thinking of looking for property...that might be a topic for off-list though.

 

Mike J. Shade

Mike J. Shade Photography:

mshadephotography.com

 

In War: Resolution

In Defeat: Defiance

In Victory: Magnanimity

In Peace: Goodwill

Sir Winston Churchill

Already, in the gathering dusk, a few of the stars are turning on their lights.

Vega, the brightest one, is now dropping towards the west.  Can it be half

a year since I watched her April rising in the east?  Low in the southwest

Antares blinks a sad farwell to fall...

Leslie Peltier, Starlight Nights

 

International Dark Sky Association: www.darksky.org

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Terri Zittritsch
Sent: Thursday, April 16, 2020 3:59 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] RAPAS on Mach2

 

On Thu, Apr 16, 2020 at 06:45 PM, Mike Shade wrote:

Using the traditional drift alignment method with an illuminated reticle eyepiece, I get round stars near the zenith with my first generation 1600GTO with a five minute unguided exposure, PEC on.  This is with a Planewave CDK 17, 2940mm fl, image scale .63"/pixel, permanent observatory setup.  Never had much use for or luck with software assisted polar alignment, although some people do.  Many years ago I had one of the red robotic mounts from "the other guys" and used their polar alignment program built into their pointing program.  Never seemed to give the same answers though.  The drift does take a bit though but as it is something I check about once a year, not that big of a deal.

Mike,
That is impressive!     This is what I want.. a once a year checkup on polar alignment!     The Planewave's are also something I've had my eye on!    We were planning to find a place with 10-20 acres this spring, and covid has put a damper on our moving for the time being.     Before the Planewave, I need an observatory!


Terri


Re: RAPAS on Mach2

Terri Zittritsch
 

On Thu, Apr 16, 2020 at 06:45 PM, Mike Shade wrote:
Using the traditional drift alignment method with an illuminated reticle eyepiece, I get round stars near the zenith with my first generation 1600GTO with a five minute unguided exposure, PEC on.  This is with a Planewave CDK 17, 2940mm fl, image scale .63"/pixel, permanent observatory setup.  Never had much use for or luck with software assisted polar alignment, although some people do.  Many years ago I had one of the red robotic mounts from "the other guys" and used their polar alignment program built into their pointing program.  Never seemed to give the same answers though.  The drift does take a bit though but as it is something I check about once a year, not that big of a deal.

Mike,
That is impressive!     This is what I want.. a once a year checkup on polar alignment!     The Planewave's are also something I've had my eye on!    We were planning to find a place with 10-20 acres this spring, and covid has put a damper on our moving for the time being.     Before the Planewave, I need an observatory!


Terri

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