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Re: More APPM Results -- Can Someone Help Me Understand This?
Ray Gralak
Ray i think that comment refers to USNO-SA2.0Yes, that is true about SA2.0, but A2.0 has been superseded by USNO-B1.0. -Ray -----Original Message-----
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Re: 1200GTO servicing project notes
About a year ago the topic of changing clutch plugs came up. I have an AP900GOTO CP3 2008 model so I asked George about whether one should change the plugs on spec. He said if they are working fine never change them. Don Anderson
On Thursday, April 22, 2021, 11:58:12 a.m. MDT, fernandorivera3 via groups.io <fernandorivera3@...> wrote:
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
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Re: 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. --
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Re: Time issues?
>>>Oh, Pete, did we forget to send your valium? 😆 nice one Karen lol
On Thu, Apr 22, 2021 at 11:52 AM Karen Christen <karen@...> wrote:
--
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Re: More APPM Results -- Can Someone Help Me Understand This?
Ray Gralak
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 According to the navy.mil website, USNO A2.0 is outdated: https://www.usno.navy.mil/USNO/astrometry/information/catalog-info#usnoa2 -Ray -----Original Message-----
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Re: More APPM Results -- Can Someone Help Me Understand This?
George
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@...
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.
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Re: Time issues?
Pete Mumbower
Yeah....you dropped the ball on that 😆
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Re: GTOCP4 Caps
Hello Linwood,
We do sell a full set of plastic covers for all the ports and doohickeys on the CPx control box as Mike mentions below. But you won’t need to request them; each mount is shipped with the set. Some folks choose to replace these with metal covers later. I hope this is helpful. Karen AP
From: main@ap-gto.groups.io <main@ap-gto.groups.io>
On Behalf Of ap@...
Sent: Thursday, April 22, 2021 11:05 AM To: main@ap-gto.groups.io Subject: Re: [ap-gto] GTOCP4 Caps
Ah, perfect, when the mount is ready I will ask for one.
Mine will be kept inside when not in use, so plastic is likely to work fine. But when in use it’s a heavy, heavy dew environment so covering unused ports is a goodness.
Thanks.
From:
main@ap-gto.groups.io [mailto:main@ap-gto.groups.io]
On Behalf Of M Hambrick via groups.io
Hi Linwood -- Karen Christen Astro-Physics
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Re: Time issues?
Oh, Pete, did we forget to send your valium? 😆 Karen AP
From: main@ap-gto.groups.io <main@ap-gto.groups.io>
On Behalf Of Pete Mumbower
Sent: Thursday, April 22, 2021 1:30 PM To: main@ap-gto.groups.io Subject: [ap-gto] Time issues?
Is it me or does time slow down the day you are waiting for the brown truck to deliver your new mount (1100GTO)? -- Karen Christen Astro-Physics
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Re: More APPM Results -- Can Someone Help Me Understand This?
mjb87@...
BTW, I am using PinPoint and they do NOT recommend UCAV4.
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Re: AP1100 park position question
Don,
Note that the DL2 is available in three thrust capacities – 1000 Newton, 1500 Newton and 2500 Newton (220#, 333# and 555#). I am using a dual column system so I went from a 440# lifting capacity to a 1111# lifting capacity.
Yours truly,
Jack
Jack Huerkamp Jack's Astro Accessories, LLC 38388 Pine Street Pearl River, LA 70452-5192 985-445-5063 30.37N 89.76W
All of us get lost in the darkness. ………………………………….Neil Peart
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Sent: Wednesday, April 21, 2021 7:34 PM To: main@ap-gto.groups.io Subject: Re: [ap-gto] AP1100 park position question
Thanks for the info Jack. I suspected as much. I checked ebay and they don't show and DL2s right now. I will have to keep my eyes open for one.
Don Anderson
On Wednesday, April 21, 2021, 07:51:02 a.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:
Don,
When I purchased the original pair of lifting columns from Linak, I was over the engineering department of the local public works department in New Orleans and we did a lot of custom fabrications for all of our facilities. As such, I was able to have them sell me two 1000 Newton columns and the associated controls. Since I was already an established customer, I was able to get an upgraded set of 2500 Newton columns and associated controls last year.
I do not think Linak sells to the general public.
Yours truly,
Jack
Jack Huerkamp Jack's Astro Accessories, LLC 38388 Pine Street Pearl River, LA 70452-5192 985-445-5063 30.37N 89.76W
All of us get lost in the darkness. ………………………………….Neil Peart
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Jack Did Linak sell direct to you?
Don Anderson
On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:
Christopher,
The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated. My original ones were rated at 1000 Newtons each when used with a non AP mount. With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.
DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)
Yours truly,
Jack
Jack Huerkamp Jack's Astro Accessories, LLC 38388 Pine Street Pearl River, LA 70452-5192 985-445-5063 30.37N 89.76W
All of us get lost in the darkness. ………………………………….Neil Peart
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.
On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
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Re: bugs in my 1200!
Thanks for the response Howard. It was just 4 perimeter holes, as you thought. I cleaned them out with about 50 Q-tips with soap solution and probed around until I got all the dirt out. There was never any gritty sound like the Ded bearings were contaminated so I figured it was fine and reassembled with my new tandem saddle rig. All is well. Steve
On Thu, Apr 22, 2021 at 11:24 AM Howard Hedlund <howard@...> wrote: Hi Steve,
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Time issues?
Pete Mumbower
Is it me or does time slow down the day you are waiting for the brown truck to deliver your new mount (1100GTO)?
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Re: APPM model how many points portable?
I have been using PlateSolve2 with SGP to do my APPM modeling for almost a year now and it only takes a second or two to solve with my laptop. So, results can vary. I use smallish detectors - ASI1600, ASI294MM, and ASI2600MC. So I’m sure that is a factor. I also use 1/2 frame with the ASI2600 which speeds things up.
-- Dean Jacobsen http://astrophoto.net/wp/ Image Gallery - http://astrophoto.net/wp/image-gallery/ Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/ Amateur Radio Call Sign - W6DBJ
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Re: APPM model how many points portable?
Roland Christen
Howe accurate is ASTAP? Less than 1 arc sec or?
Rolando
-----Original Message-----
From: Jim Grubb via groups.io <jimgrubb@...> To: main@ap-gto.groups.io Sent: Thu, Apr 22, 2021 10:34 am Subject: Re: [ap-gto] APPM model how many points portable? I have the 1100 with encoders and have found a very successful very quick workflow using ASTAP-SGP-APPM. You can turn off blind solving and it will very quickly move to the next point if it fails. This is useful as I have the same issue with my horizon map not being perfect. When the scope is pointing at the trees or the house, it just fails and quickly moves onto the next point. This only happens for me near the horizon. ASTAP is by far the fastest solver I have used and usually solves in under a second so you can turn the "Max Solve Time" parameter way down and it will fail very quickly. I currently have mine set at 10s and am sure I could lower it to 2 or 3 seconds with no issues at all. You may need to do a blind solve when you first set up the scope before you begin the pointing run. [Screenshot: APPM - Plate Solve Settings Page]
On to the topic of how many points. If you are only going after one target in an evening, you can run a narrow line at the declination of the target you are going to be imaging. I typically use two lines spaced close together. Here is an example of an 88 point model which covers 7 degrees of declination. I can run this model in 1/2 hour. And this is overkill, way more points than needed. [Screenshot: Pointmap 1 example] If you pull back on the RA spacing and tighten up the dec so that it only runs a single line of points at the exact declination of your target, you could get this down to 27 points, which on my rig will run in about 10 minutes. [Screenshot: Pointmap 2 example] Good luck! Jim As you experiment with different spacing, you will start to get a feel for what works. -- Roland Christen Astro-Physics
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Re: Best way to prevent dovetail saddle plate from sticking to the mount?
fernandorivera3
Wow I wasn't aware this could happen especially less than a month of the plate bolted on top 😳
Fernando
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Re: 1200GTO servicing project notes
fernandorivera3
Mike- yes, correct it was the screw extractor I was talking about. Have not used one of those yet.
Fernando
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Re: GTOCP4 Caps
Ken Sablinsky
Either I'm really confusing myself, or the drawing I found was incorrect. I found this on the Mauser website showing the "71" version is 19mm x 1, and the 31 version matched that. Guess I should have measured my actual CP4 instead of relying on the drawings, darn it. Plus, the 71 version still shows out of stock discontinued - maybe I'm looking at the wrong adapter?
https://www.mouser.com/ProductDetail/Hirose-Connector/RM15TR-C71?qs=%2Fha2pyFadujF6dwDSTFNgVUE%2FRNk7I0u0R6Fk%252BD%252B6mmqK1TJX8uIgQ%3D%3D 
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Re: 1200GTO servicing project notes
fernandorivera3
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
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Re: GTOCP4 Caps
Hi Ken
The RM15TR-C(71) caps are the ones that will fit the larger diameter threaded connectors on the GTOCP4 that the Y-cable and Encoder cable attach to. I checked the website and the internal thread specifications for the RM15TR-C(71) and RM15TR-C(31) are different (see below). Be VERY careful if you try to screw the RM15TR-C(31) caps onto your GTOCP4 that you do not strip out the threads of the connectors. If they do not thread on very easily, don't try to force them. In fact, based on the drawings below I don't think I would try them at all. I measured the threads on my GTOCP4 and verified that they are M20 X 2 threads. It is interesting that Mouser told you they are out of stock of the RM15TR-C(71) caps. I ordered three of them yesterday and they don't show to be backordered. I am on the Mouser web site now, and they are showing that they have 26 of the RM15TR-C(71) caps in stock. You can also try searching using the Mouser number 798-RM15TRDC71. Mike Here is the RM15TR-C(71) It has M20 X 2 internal threads. This is the correct cap for the connectors on the GTPCP4.  Here is the RM15TR-C(31). It has M19 X 1 internal threads: 
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