Date   

Sticky 600E Controller Button

Elenillor
 

Not a goto mount but my mid 90's 600E stepper motor hand controller has an intermittently sticky north button. Any suggestions on how to fix it? 

Taking the cover off the controller it seems straightfoward to unsolder and replace a button. Any suggestion of a decent replacement button?

I removed the covers on the N and W buttons so it was easy to feel the difference in the dark.

John


Re: Pay Attention to Those Declination Top Plate Locking Knobs

Shailesh Trivedi
 

Mike,

Are you referring to the silver knobs under the DEC plate? If they come lose do you not have holding screws? 

On a side note: do you have any tracking or balancing issues with the 180EDT? Is it on a permanent pier or a tripod? 

I have a TEC180 and am wondering about a moment-arm for my AP1100. 

Shailesh


Re: Pay Attention to Those Declination Top Plate Locking Knobs

Joe Zeglinski
 

Hi Mike,
 
   Nice job on your pencilled setting circles.  I was thinking the same thing about perhaps AP providing “stick-on-tape” setting circles as visual aids for their mounts, as an option. That would save production work and materials & stocking for the old fashioned types. However, I suppose the pencil (or inked) marked ones can easily wash off or smudge, after all that hard work.
 
    Easy to make permanent ones – just measure and test print such setting angle strips  first, on paper. Later , when they seem to be correct with their ends taped/joined, plastic ones could then be printed with a laser printer,  onto “overhead projection cell” material, as a clear acetate glue-on. You might have to print on the sheet’s diagonal, depending on axle cap diameter, to fit – or even as two pieces, 180 degree strips. I would first “reverse” the printing image, so that once it is printed (mirror imaged) and flipped over, the lettering would be on the back side of the strip, protected from dew etc.
 
    Might even glue the printed strips onto “Glow in the dark”  tape, before applying that tape to the axle. That way, it will be easier to read the angles with the glow backlighting effect,  even without a permanent battery operated LED indicator bulb. But don’t forget to account for the tape’s thickness, adding to the diameter, when measuring the printed setting circle  strips.
 
Joe Z.


Re: APCC pointing model effects on DEC tracking

Roland Christen
 


The DEC axis tracking error grows up to about 2-3 arc-sec tracking error
The Dec axis doesn't track. There is no tracking in Dec, only the RA axis tracks at sidereal rate. Do you mean Dec Guiding by any chance?
APCC pointing model does not set custom tracking unless you turn on the custom rate in APPM.
Which mount are we talking about?

Rolando

-----Original Message-----
From: david w pearson via groups.io <p.davidw@...>
To: main@ap-gto.groups.io
Sent: Tue, Feb 23, 2021 11:43 am
Subject: [ap-gto] APCC pointing model effects on DEC tracking

 
Notice something new with my autoguiding, Maxim DL,APCC pointing model setup upon initial guiding during startup.   thereafter it doesn't happen.
The DEC axis tracking error grows up to about 2-3 arc-sec tracking error before converging back to normal at 0.1 to 0.3 arcsec in about 60 seconds.
During this time, i use an aggressiveness of 10 In maxim DL.      Does the APCC pointing model tracking algorithm try to compensation for DEC tracking 
errors, using the pointing model, that would account for the 60 sec tracking error convergence?      Also i have noticed that my pointing point model probably needs to be redone as
 my pointing errors seem to be worse than right after model build.     My first impression is my polar alignment may be further off than the pointing model is assuming?
Any insight that would direct me toward the solution would be appreciated.
thanks
dave

--
Roland Christen
Astro-Physics


APCC pointing model effects on DEC tracking

david w pearson
 

 
Notice something new with my autoguiding, Maxim DL,APCC pointing model setup upon initial guiding during startup.   thereafter it doesn't happen.
The DEC axis tracking error grows up to about 2-3 arc-sec tracking error before converging back to normal at 0.1 to 0.3 arcsec in about 60 seconds.
During this time, i use an aggressiveness of 10 In maxim DL.      Does the APCC pointing model tracking algorithm try to compensation for DEC tracking 
errors, using the pointing model, that would account for the 60 sec tracking error convergence?      Also i have noticed that my pointing point model probably needs to be redone as
 my pointing errors seem to be worse than right after model build.     My first impression is my polar alignment may be further off than the pointing model is assuming?
Any insight that would direct me toward the solution would be appreciated.
thanks
dave


Re: Celestial Fireworks

Peter Nagy
 

Submit to APOD!!!!

Peter 


Re: Pay Attention to Those Declination Top Plate Locking Knobs

George
 

Mike,

 

Remember that there are also Safety Screws for each axis.

 

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 M Hambrick
Sent: Tuesday, February 23, 2021 10:59 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Pay Attention to Those Declination Top Plate Locking Knobs

 

Here's a little lesson learned tidbit that I just discovered on my 1100 mount:

I have been noticing lately when setting up the mount with my 180 EDT that there is some play in the dec. axis. I thought that maybe the clutches were not tight enough, but when I checked them they were all tight. Today I was setting up the mount inside the house to do some rebalancing, and when I was attaching the declination axis I noticed a significant movement when I was holding the axis by the mounting plate. When I looked closer it turns out that it was actually the declination top plate that was moving, and when I checked the locking knobs they were loose.

I never touch these knobs, but over the months they must have worked their way loose. So the lesson I took away from this is to check those locking knobs every time I set up the mount.

Check those hand-drawn declination setting circles out in the photo. It sure would be nice to have something more permanent (hint - hint). I made these with a pencil. 

Mike


Pay Attention to Those Declination Top Plate Locking Knobs

M Hambrick
 

Here's a little lesson learned tidbit that I just discovered on my 1100 mount:

I have been noticing lately when setting up the mount with my 180 EDT that there is some play in the dec. axis. I thought that maybe the clutches were not tight enough, but when I checked them they were all tight. Today I was setting up the mount inside the house to do some rebalancing, and when I was attaching the declination axis I noticed a significant movement when I was holding the axis by the mounting plate. When I looked closer it turns out that it was actually the declination top plate that was moving, and when I checked the locking knobs they were loose.

I never touch these knobs, but over the months they must have worked their way loose. So the lesson I took away from this is to check those locking knobs every time I set up the mount.

Check those hand-drawn declination setting circles out in the photo. It sure would be nice to have something more permanent (hint - hint). I made these with a pencil. 

Mike


Re: [ap-ug] Celestial Fireworks

Roland Christen
 

That is one nice image of Jupiter! Thanks for posting

Roland


-----Original Message-----
From: thefamily90 Phillips <thefamily90@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>; main@ap-ug.groups.io <main@ap-ug.groups.io>
Cc: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Feb 22, 2021 7:29 pm
Subject: Re: [ap-gto] [ap-ug] Celestial Fireworks

I’ve got one of those original AP 10” F/14.6 Maksutovs. Great for lunar and planetary imaging also.

AP 10”
Damian Peach, Dave Tyler, Jim Phillips

Image.jpeg


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Pete Lardizabal <p14@...>
Sent: Monday, February 22, 2021 8:16:22 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Cc: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] [ap-ug] Celestial Fireworks
 
“BAM!”

😎

Pete

On Feb 22, 2021, at 7:57 PM, Roland Christen via groups.io <chris1011@...> wrote:


With the lousy weather this February I decided to reprocess a couple of images taken back in 2011. Can't get decent skies this week or next according to long term weather outlook.
This image was taken with my original 10" F14.6 Mak-Cass. Who says you have to shoot at F5 to get anything. This is with my old STL11K camera, which is still working great.

https://www.astrobin.com/n5nn5a/

Rolando

--
Jim Phillips

--
Roland Christen
Astro-Physics


Re: Celestial Fireworks

Roland Christen
 

Back then I almost always did 20 minute exposures.

Roland



-----Original Message-----
From: Pete Mumbower <pmumbower@...>
To: main@ap-gto.groups.io
Sent: Mon, Feb 22, 2021 7:12 pm
Subject: Re: [ap-gto] Celestial Fireworks

Wow that is one heck of an image! Do you recall any exposure times, even overall?

--
Roland Christen
Astro-Physics


Re: [ap-ug] Celestial Fireworks

thefamily90 Phillips
 

I’ve got one of those original AP 10” F/14.6 Maksutovs. Great for lunar and planetary imaging also.

AP 10”
Damian Peach, Dave Tyler, Jim Phillips

Image.jpeg


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Pete Lardizabal <p14@...>
Sent: Monday, February 22, 2021 8:16:22 PM
To: main@ap-ug.groups.io <main@ap-ug.groups.io>
Cc: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] [ap-ug] Celestial Fireworks
 
“BAM!”

😎

Pete

On Feb 22, 2021, at 7:57 PM, Roland Christen via groups.io <chris1011@...> wrote:


With the lousy weather this February I decided to reprocess a couple of images taken back in 2011. Can't get decent skies this week or next according to long term weather outlook.
This image was taken with my original 10" F14.6 Mak-Cass. Who says you have to shoot at F5 to get anything. This is with my old STL11K camera, which is still working great.

https://www.astrobin.com/n5nn5a/

Rolando


Re: Celestial Fireworks

dvjbaja
 

  Just match pixel size to focal length. High qe camera helps too.  Some of the new backilluminated cmos cameras allowing binning would be excellent.  

J



Sent via the Samsung Galaxy Note9, an AT&T 5G Evolution capable smartphone


-------- Original message --------
From: "Roland Christen via groups.io" <chris1011@...>
Date: 2/22/21 4:57 PM (GMT-08:00)
To: main@ap-gto.groups.io, main@ap-ug.groups.io
Subject: [ap-gto] Celestial Fireworks

With the lousy weather this February I decided to reprocess a couple of images taken back in 2011. Can't get decent skies this week or next according to long term weather outlook.
This image was taken with my original 10" F14.6 Mak-Cass. Who says you have to shoot at F5 to get anything. This is with my old STL11K camera, which is still working great.

https://www.astrobin.com/n5nn5a/

Rolando

--
Roland Christen
Astro-Physics


Re: [ap-ug] Celestial Fireworks

Pete Lardizabal
 

“BAM!”

😎

Pete

On Feb 22, 2021, at 7:57 PM, Roland Christen via groups.io <chris1011@...> wrote:


With the lousy weather this February I decided to reprocess a couple of images taken back in 2011. Can't get decent skies this week or next according to long term weather outlook.
This image was taken with my original 10" F14.6 Mak-Cass. Who says you have to shoot at F5 to get anything. This is with my old STL11K camera, which is still working great.

https://www.astrobin.com/n5nn5a/

Rolando


Re: Celestial Fireworks

Pete Mumbower
 

Wow that is one heck of an image! Do you recall any exposure times, even overall?


Re: Celestial Fireworks

Terry Martin
 

Wow! That's incredible Roland.


Celestial Fireworks

Roland Christen
 

With the lousy weather this February I decided to reprocess a couple of images taken back in 2011. Can't get decent skies this week or next according to long term weather outlook.
This image was taken with my original 10" F14.6 Mak-Cass. Who says you have to shoot at F5 to get anything. This is with my old STL11K camera, which is still working great.

https://www.astrobin.com/n5nn5a/

Rolando

--
Roland Christen
Astro-Physics


Re: Shipping an AP1100

coolnote@...
 

Thank you, Roland, best regards to you and your team at AP.


Re: AP1100 clockwise question

Roland Christen
 

Polar alignment error is compensated when you make a model. I can't answer your 15 - 20 minute unguided imaging question.

Rolando



-----Original Message-----
From: Shailesh Trivedi <strivedi@...>
To: main@ap-gto.groups.io
Sent: Mon, Feb 22, 2021 10:33 am
Subject: Re: [ap-gto] AP1100 clockwise question

Thanks, Roland.  Is sub arc minute level PA sufficient (both AZ and ALT) to do unguided imaging (say 15 or 20min NB) with standard AEs? 

Shailesh

--
Roland Christen
Astro-Physics


Re: AP1100 clockwise question

Shailesh Trivedi
 

Thanks, Roland.  Is sub arc minute level PA sufficient (both AZ and ALT) to do unguided imaging (say 15 or 20min NB) with standard AEs? 

Shailesh


Re: AP1100 clockwise question

Roland Christen
 


One final question: what happens if I change the clutch settings? Do I redo APPM? I am assuming it does not alter polar alignment though.
Clutch settings have no effect on polar alignment. It may affect the model to a small extent, so I would try to return the mount back to the original position after doing a manual adjustment of balance.

Rolando


-----Original Message-----
From: Shailesh Trivedi <strivedi@...>
To: main@ap-gto.groups.io
Sent: Mon, Feb 22, 2021 9:38 am
Subject: Re: [ap-gto] AP1100 clockwise question

Thank you, Jimmy and Jeff B. I was able to use JImmy's tape trick to determine the direction of rotation. For those who have AP1100, the right AZ knob turns the mount clockwise while looking from above (PEMPRO calls it moving east) and the left knob turns the mount counter-clockwise (PEMPro west). This took me about 2.5 hrs last night, I am sure as I gain more experience I can do it faster, but then may not have to redo it (hopefully).

I was able to use PEMpro to polar align to sub arc minute level for AZ and ALT. Not sure if this is sufficient to do unguided imaging with absolute encoders, but I did get a 237 point APPM model done last night. I have not redone Tpoint yet. 

One final question: what happens if I change the clutch settings? Do I redo APPM? I am assuming it does not alter polar alignment though.


Shailesh

--
Roland Christen
Astro-Physics

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