Date   

Re: GTOCP4 Caps

Joe Zeglinski
 

Question to the group.
 
    Can anyone think of a logical  reason to plug “drainage holes”  with those rubber cones?
Do we really want to make sure that any dew or other source of moisture  leaking into the controller, should be kept inside? 
The only thing I can think of is to keep any itsy-bitsy bugs out – but then why drill the two holes into the case, in the first place?
Perhaps that is covered somewhere in the user guide :-)
 
Joe
 

From: M Hambrick
Sent: Thursday, April 22, 2021 8:50 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] GTOCP4 Caps
 
Hi Pete

Those cone shaped plugs are used to plug the drain / vent holes in the bottom of the GTOCP4 housing. Tony (a.k.a. Harley Davidson) made an excellent video a couple years ago about the need to have drain holes in the housing to allow condensate to drain out.

Mike


Re: GTOCP4 Caps

M Hambrick
 

Hi again Ken

I just received a shipment notice from Mouser for the RM15TR-C(71) caps. I was worried that they might substitute the same one that they recommended for you, but they are sending the ones that I ordered. I will find out when they arrive on Monday April 26. 

FYI - These caps shipped from Mouser Canada. I don't know if they have more than one location, but it is possible that they were only out of stock at the particular location you were trying to buy them from.

I will keep you posted.

Mike


Re: NASA's guide to Black Holes

Robert Sinitiere <bobstar9@...>
 

Thanks, Rolando.  Should I vacation near a Black Hole, I will “heed your advice”. Bob
⭐️👽😳


On Apr 22, 2021, at 7:12 PM, Roland Christen via groups.io <chris1011@...> wrote:


Enjoy!

https://www.youtube.com/watch?v=aMTwtb3TVIk

Rolando

--
Roland Christen
Astro-Physics


Re: APPM model how many points portable?

Bill Long
 

What is the best way to test the accuracy level? 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Roland Christen via groups.io <chris1011@...>
Sent: Thursday, April 22, 2021 5:40 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] APPM model how many points portable?
 
If it isn't accurate to 1 arc sec or better then it will impact unguided imaging in a negative way.

Rolando



-----Original Message-----
From: Jim Grubb via groups.io <jimgrubb@...>
To: main@ap-gto.groups.io
Sent: Thu, Apr 22, 2021 7:21 pm
Subject: Re: [ap-gto] APPM model how many points portable?

Hi Rolando,

I'm not sure how to measure how accurate ASTAP is.  I guess I could run a solve with ANSVR or pinpoint and measure the difference in results? 

Jim

--
Roland Christen
Astro-Physics


Re: GTOCP4 Caps

M Hambrick
 

Hi Pete

Those cone shaped plugs are used to plug the drain / vent holes in the bottom of the GTOCP4 housing. Tony (a.k.a. Harley Davidson) made an excellent video a couple years ago about the need to have drain holes in the housing to allow condensate to drain out.

Mike


Re: GTOCP4 Caps

Pete Mumbower
 

Just going thru my newly arrived 1100GTO boxes and I came across the bag of plastic caps that Karen mentioned above. Here is a picture of all that is included, though I am not sure what the two cone shaped items go to yet. Looks to cover every port on the CP4 that I received.


Re: APPM model how many points portable?

Roland Christen
 

If it isn't accurate to 1 arc sec or better then it will impact unguided imaging in a negative way.

Rolando



-----Original Message-----
From: Jim Grubb via groups.io <jimgrubb@...>
To: main@ap-gto.groups.io
Sent: Thu, Apr 22, 2021 7:21 pm
Subject: Re: [ap-gto] APPM model how many points portable?

Hi Rolando,

I'm not sure how to measure how accurate ASTAP is.  I guess I could run a solve with ANSVR or pinpoint and measure the difference in results? 

Jim

--
Roland Christen
Astro-Physics


Re: APPM model how many points portable?

Jim Grubb
 

Hi Rolando,

I'm not sure how to measure how accurate ASTAP is.  I guess I could run a solve with ANSVR or pinpoint and measure the difference in results? 

Jim


NASA's guide to Black Holes

Roland Christen
 

Enjoy!

https://www.youtube.com/watch?v=aMTwtb3TVIk

Rolando

--
Roland Christen
Astro-Physics


Re: 1200GTO servicing project notes

Joe Zeglinski
 

Good idea about using extractor bits, if the plugs are not “mushed” inside ..
 
    But, if the AP-900/1200 Delrin plugs are pushed in so far, that they “mushroom-head” into the space beyond the threads, then there is no way that the screw extractor bit, or even the AP Tool,  will unscrew the originally smooth, but now “thread-impressed Delrin”, or pull it out without fracturing the plastic plug. Happened to mine, requiring complete disassembly to get the plug pieces out.
 
Joe
 

From: fernandorivera3 via groups.io
Sent: Thursday, April 22, 2021 1:57 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] 1200GTO servicing project notes
 
Dale thanks for commenting. I have a 1200 GTO that I bought brand new from AP in July 2009. No problems yet with delrin clutch plugs getting stuck or seized & hoping it stays that way 🤞

Fernando


Re: AP1100 park position question

Joe Zeglinski
 

I agree, Bryan.
 
    If I were to go with a dual lift PT3, and there was a possibility of any cold weather seizing problem, I would be concerned about one of the two piers, lagging behind its mate, unless there is an “overload-cutoff” sensor.
 
Joe
 

From: Worsel via groups.io
Sent: Thursday, April 22, 2021 5:39 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question
 
Joe

I live in western Colorado and have had the PierTech adjustable pier (which, AFAIK, is a Linak) for 6 years without any issues...and I bought it used from someone who lived in Silverton (I live in the colorado banana belt by comparison).  Temperature range here is frequently -5C to +25 and has been, on occasion, -15 to +30 over the course of a year.  That said, I have never operated it close to those extremes (my limit, not the equipment!) 8-).  Storage range is -20 to +70C, which I would equate to just sitting in the observatory without movement.

Also it will go through its full 50cm range of motion in 25s (2 cm/s); so the 19 minute pause after one minute is never a factor.  I do not try to fine-tune.  I have the operational height marked on the inner column.

If I was going to change anything, I would pay the additional $1000US over the PT2 and buy the dual pier (PierTech PT3) to ensure stability.

Bryan


Re: APPM model how many points portable?

Worsel
 

Greg

From APPC Pro manual

To use APPM with your mount you will need to have the following:

1) Camera Control Software and a camera supported by that software:
a) MaxIm DL Pro v5 or later -
b) CCDSoft V5
c) TheSkyX Pro Camera Add-on
d) AstroArt V3 or later
e) Any camera with an ASCOM Camera Driver
f) Sequence Generator Pro.
g) Meade DSI I-III cameras are also supported, but their sensors are usually not large enough to
capture enough stars for reliable plate solves.

2) Plate Solving Software:
a) The full version of DC3 Dreams PinPoint application. Version 6 of Pinpoint is preferred.
b) TheSkyX Pro
c) Plate solving using Sequence Generator Pro

Eventually Ray will integrate ASTAP into APPM.


Bryan


Re: GTOCP4 Caps

Joe Zeglinski
 

Hi Mike,
 
    I ordered the plastic caps set for mine. They really should come standard with any CPx controller, and the metal ones offered as a valuable option.
 
    Two things to keep in mind about sourcing the such caps elsewhere.
 
    First, the AP set also includes that ...  tiny plastic plug ... for the CP4/5 USB port (which I don’t use), and it isn’t one of the common PC caps listed in a recent vendor link. The USB and Ethernet socket protection plugs are essential, since these can - (in some perhaps rare cases, like older mount top-side placement), become “tiny water reservoirs”  exposed to dew rolling off an OTA slewing by, potentially  puddling inside the controller. My two unfortunate experiences.
The other  Mil-Spec Amphenol socket ports not only have hermetically sealed leak-proof pin bases inside their sockets, but are very firmly bolted from behind, preventing any panel seepage.
 
    Second, I wonder if the metal caps could become “FROZEN”, (perhaps) difficult to unscrew,  on  exceptionally cold northern winter days.
Guess I would have to either have a portable hair dryer or take the controller indoors, or into the heated vehicle to thaw out the caps.
 
    Tony’s detailed, excellent video  - as  his always are -  about sourcing these metal caps, mentions their underlying “rubber cushions” to provide some push-back, allowing the twist-bayonet cap locks to be snugged-up. But, another benefit of the rubber cushion is to hermetically seal up the exposed tops of the pins, during storage, so they don’t oxidize as easily.
 
    However, I would caution about snipping off the “cap chains” if the scope travels to a dark site. You might lose a cap in the snow or dark ground cover, if they aren’t at least tethered by a shared lanyard to the pier/mount. The black plastic caps are far easier to lose.
If I don’t opt for replacing some of them with the metal caps, I may paint the standard AP black ones with glow-in-the-dark paint. Red plastic “CAPLUGS”, like the AP reducer covers, etc.  would have been somewhat better in that regard, but round ones may not be commonly available in such a wide assortment.
 
Joe Z.
 
 

From: M Hambrick
Sent: Thursday, April 22, 2021 11:58 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] GTOCP4 Caps
 
Hi Linwood

Actually, Astro-Physics offers a set of plastic covers for all of the connectors on the GTOCP4/5 and the mount motors. You will have to call them to order a set. The interest in the metal covers is because they are more durable, and they will stay put, but as a minimum you should get a set of the plastic ones. I think they run about $15.00.

Mike


Re: AP1100 park position question

Worsel
 

Joe

I live in western Colorado and have had the PierTech adjustable pier (which, AFAIK, is a Linak) for 6 years without any issues...and I bought it used from someone who lived in Silverton (I live in the colorado banana belt by comparison).  Temperature range here is frequently -5C to +25 and has been, on occasion, -15 to +30 over the course of a year.  That said, I have never operated it close to those extremes (my limit, not the equipment!) 8-).  Storage range is -20 to +70C, which I would equate to just sitting in the observatory without movement.

Also it will go through its full 50cm range of motion in 25s (2 cm/s); so the 19 minute pause after one minute is never a factor.  I do not try to fine-tune.  I have the operational height marked on the inner column.

If I was going to change anything, I would pay the additional $1000US over the PT2 and buy the dual pier (PierTech PT3) to ensure stability.

Bryan


Re: Time issues?

Pete Mumbower
 

Look like I need extra valium for tomorrow too. UPS delivered 4 of 6 boxes! At least it looks like the important ones (RA/Dec axis are here!) ;)


Re: AP1100 park position question

Worsel
 

Howard

You should know as well as anyone that we NEVER have the largest aperture scope we want!  ;)

Bryan


...
PLEASE!  PLEASE!   PLEASE!  Do NOT make your roll-off walls so low that you only barely clear the scope.  Allow for the largest diameter scope that you ever plan to own, and then allow a bit of cushion.  Unless you are on the highest point on a small desert island, you won't be imaging right at the horizon, so slightly taller walls won't hurt you. 


Re: APPM model how many points portable?

Dale Ghent
 

APPM and NINA currently don't talk with each other. You will need to run APPM by using your camera's ASCOM driver and any of the plate solving mechanisms that are currently supported by APPM.

I personally go about it with APPM connected to the camera via its ASCOM driver, and using TheSkyX's ImageLink plate solving. Once the modeling run is done, I shut all that down, make sure the new model is loaded up in APCC, then start NINA and go about my usual workflow.

/dale

On Apr 22, 2021, at 17:03, Greg McCall <emailgregnow@gmail.com> wrote:

How do you get APPM to work with "NINA and ASTAP combo"?


Re: More APPM Results -- Can Someone Help Me Understand This?

Don Anderson
 

USNO-B1.0 has been taken off line by USNO. The only way to use B 1.0 is if you have a local version on you computer.

Don Anderson


On Thursday, April 22, 2021, 01:32:49 p.m. MDT, Ray Gralak <iogroups@...> wrote:


> Ray i think that comment refers to  USNO-SA2.0
>
> USNO-SA2.0 is a subset of USNO-A2.0

Yes, that is true about SA2.0, but A2.0 has been superseded by USNO-B1.0.

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
> Sent: Thursday, April 22, 2021 12:17 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>
> Ray i think that comment refers to  USNO-SA2.0
>
> USNO-SA2.0 is a subset of USNO-A2.0
>
>
> On Thu, Apr 22, 2021 at 12:13 PM Ray Gralak <iogroups@...> wrote:
>
>
>     > For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.
>
>     Bad information maybe?
>
>     According to the navy.mil website, USNO A2.0 is outdated:
>
>     https://www.usno.navy.mil/USNO/astrometry/information/catalog-info#usnoa2
>
>     -Ray
>
>
>
>     > -----Original Message-----
>     > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of George
>     > Sent: Thursday, April 22, 2021 12:05 PM
>     > To: main@ap-gto.groups.io
>     > Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>     >
>     > For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.
>     >
>     >
>     >
>     > Regards,
>     >
>     >
>     >
>     > George
>     >
>     >
>     >
>     > George Whitney
>     >
>     > Astro-Physics, Inc.
>     >
>     > Phone:  815-222-6538 (direct line)
>     >
>     > Phone:  815-282-1513 (office)
>     >
>     > Email:  george@... <mailto:george@...>
>     >
>     >
>     >
>     > From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of mjb87 via groups.io
>     > Sent: Thursday, April 22, 2021 1:49 PM
>     > To: main@ap-gto.groups.io
>     > Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>     >
>     >
>     >
>     > BTW, I am using PinPoint and they do NOT recommend UCAV4.
>     >
>     >
>
>
>
>
>
>
>
>
>
>
> --
>
> Brian
>
>
>
> Brian Valente
> portfolio brianvalentephotography.com  <http://brianvalentephotography.com>
>







Re: APPM model how many points portable?

Greg McCall
 

How do you get APPM to work with "NINA and ASTAP combo"?


Re: Time issues?

Don Anderson
 

Yes. Don't want to pass the event horizon!

Don Anderson


On Thursday, April 22, 2021, 02:55:46 p.m. MDT, M Hambrick <mhambrick563@...> wrote:


It is also related to the increase in the force of gravity as you age.

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