Date   

Re: Cloudy Nights post about the Mach 2 needs clarification

Roland Christen
 

Thank you all for coming to my rescue.
And now back to my imaging. Night is clear with a bit of smoke from the West. Seeing is medium, tracking is excellent with model running and slight bump guiding so I can recover from dither.

Rolando



-----Original Message-----
From: Roland Christen via groups.io <chris1011@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Sep 18, 2021 10:16 pm
Subject: Re: [ap-gto] Cloudy Nights post about the Mach 2 needs clarification

Mr Wang is already convinced. He worked with me to solve his issue, so he is all set. He is most likely not available right now to post anything. I believe he is traveling.

Rolando



-----Original Message-----
From: Worsel via groups.io <bryancashion@...>
To: main@ap-gto.groups.io
Sent: Sat, Sep 18, 2021 10:08 pm
Subject: Re: [ap-gto] Cloudy Nights post about the Mach 2 needs clarification

Terroll responded as you requested.  Whether or not it convinces Mr. Wang or solves his 'oscillation' is to be seen.

Bryan

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: Cloudy Nights post about the Mach 2 needs clarification

Roland Christen
 

Mr Wang is already convinced. He worked with me to solve his issue, so he is all set. He is most likely not available right now to post anything. I believe he is traveling.

Rolando



-----Original Message-----
From: Worsel via groups.io <bryancashion@...>
To: main@ap-gto.groups.io
Sent: Sat, Sep 18, 2021 10:08 pm
Subject: Re: [ap-gto] Cloudy Nights post about the Mach 2 needs clarification

Terroll responded as you requested.  Whether or not it convinces Mr. Wang or solves his 'oscillation' is to be seen.

Bryan

--
Roland Christen
Astro-Physics


Re: Cloudy Nights post about the Mach 2 needs clarification

Roland Christen
 

I am actually imaging right now with my rig. Won't be going home for a while. Trying to nail down the Elephant trunk.

Rolando



-----Original Message-----
From: ap@... <ap@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Sat, Sep 18, 2021 9:37 pm
Subject: Re: [ap-gto] Cloudy Nights post about the Mach 2 needs clarification

Roland said:
 
  • ….
    I will be able to sleep better tonight.
 
 
That’s the second time you suggested sleeping at night.  You do realize the rest of us depend on you imaging and working on new equipment at night, not sleeping, right?   😊
 
Linwood
 

--
Roland Christen
Astro-Physics


Re: Cloudy Nights post about the Mach 2 needs clarification

Worsel
 

Terroll responded as you requested.  Whether or not it convinces Mr. Wang or solves his 'oscillation' is to be seen.

Bryan


Re: Cloudy Nights post about the Mach 2 needs clarification

ap@CaptivePhotons.com
 

Roland said:

 

  • ….I will be able to sleep better tonight.

 

 

That’s the second time you suggested sleeping at night.  You do realize the rest of us depend on you imaging and working on new equipment at night, not sleeping, right?   😊

 

Linwood

 


Cloudy Nights post about the Mach 2 needs clarification

Roland Christen
 

Hello Guys,

https://www.cloudynights.com/topic/767964-lets-torture-the-mach-2/page-3#entry11371098

Can someone please post a reply to the confusion that Mr. Wang's post is causing about his Mach2 not being able to carry his TOA telescope. We have communicated with Mr. Wang and sent him instructions that will fix the issue, but he has not posted anything further. he will not be able to implement the fix for several weeks because the mount is at another facility.

For sure the mount can carry the TOA telescope and much more weight. We discovered a small error in his parameters which he can fix easily with a simple command.

https://www.cloudynights.com/topic/767964-lets-torture-the-mach-2/page-3#entry11371098

If someone can post an update to this thread,I will be able to sleep better tonight.

Thanks,

Rolando

--
Roland Christen
Astro-Physics


Re: APPM - error

Ron Kramer
 

I got it working, not SURE what I did - other than I went full frame and Bin2 for ASTAP.  It's about 3/4 through the model as I type this. 

I do have some minor issues with APPM not waiting quite long enough for the dome to slew and settle.  9 out of 10 times it does but sometimes it's hasty and the dome is 1/3 over the scope.  Luckily I picked up enough stars to still solve when this happens. 

 


Re: Looking for DOVEDV10

Worsel
 

K

ADM Accessories builds excellent quality dual series saddles for many applications.

https://www.admaccessories.com/product-category/dv-series/dovetail-saddle-dv-series/

Bryan


Re: Dovelm162 springs too short or assembled wrong?

Worsel
 

See this video for an approach to works for me, even for the few times that I have had to take the OTA off in an observatory.  14.5" IDK on an 1100 GT.  I did build a table that sits at the right height when the OTA is rotated down.  I did not think a stool was substantial enough.

https://www.youtube.com/watch?v=IwVg1M6bURI&t=167s

The video is a bit over the top and a little jumpy, but the concept is clear.

Bryan


Re: semi-OT: deterring critters in the obsy

Peter Nagy
 

I don't have an observatory but every Spring maybe in April, if I see wasp trying to build a nest in my backyard, I use a fly swatter to wack as many wasps as I can and at least one of them is a queen, they never seem to swarm my yard again until next year. It's usually no more than 10 wasps a year to wack them.

Peter


Re: semi-OT: deterring critters in the obsy

Mike Dodd
 

On 9/18/2021 10:51 AM, Michael Hamburg via groups.io wrote:
My biggest problem has always ben mice!
Last summer mice built a large nest in the open area beneath my 1200's RA assembly. After removing it, I set a trap with peanut butter bait, but never caught a mouse. Same this year -- a small nest, but no trapped mice.

There was a pile of leaves and grass behind the computer monitor in the NE corner, so I'm sure they were coming in via the ROR support track --
up the diagonal brace, along the track, and through the track gap in the gable end.

This year I installed aluminum screening around the top of the track support posts (image attached). So far, so good.

When I built the observatory, I glued screening to the pier and the sides of hole in the floor as a "critter screen" to keep out everything prowling on the ground. <http://astronomy.mdodd.com/observatory.html#CritterScreen>

--- Mike


Re: semi-OT: deterring critters in the obsy

Andrea Lucchetti
 

In my old observatory I built an aluminum wall around the pier, 60 cm height. It was actually a defense line wide enough to include the rack with electronics. The walls were flat to avoid the mice climbing. That after the first attack in which they chewed all the cables 😂


Looking for DOVEDV10

KHursh
 

A-P appears to be out. I have a DOVELM162 for trade if that is amenable. I've had ads on AM and CN for a little while with no luck.


Re: Slight Slop in the RA Axis of My Mach2

Roland Christen
 

Great! Now I can sleep at night.

Roland



-----Original Message-----
From: davidcfinch9 via groups.io <DF121819@...>
To: main@ap-gto.groups.io
Sent: Sat, Sep 18, 2021 9:40 am
Subject: Re: [ap-gto] Slight Slop in the RA Axis of My Mach2

Roland,
Thank you, success! Although it appeared that the pivot bolt was too LOOSE. At any rate, I jockeyed the pivot bolt around so that I got good mesh while still allowing the gears to come slightly out of mesh when pushing down on the back of the motor. With everything back together, there is no longer any “slop” in the axis.
And thank you for the quick response.
Regards,
David C. Finch
 
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Friday, September 17, 2021 6:20 PM
To: main@ap-gto.groups.io
Cc: george@...; howard@...; marj@...; karen@...; dave@...
Subject: Re: [ap-gto] Slight Slop in the RA Axis of My Mach2
 
Hello Dave,
 
Your pivot bolt might be too tight which is preventing the worm from pivoting fully into mesh. It's an easy adjustment.
Remove the outer motor box cover and set it aside with its 4 screws.
Remove the 4 screws that hold the inner cover and put those screws aside in another place, but do not mix them with the outer screws!
Now slide the inner cover back and out of the way to expose the worm assembly. You don't need to remove it entirely.
 
First make sure that the 3 Allen screws that hold the motor assembly to the RA axis are fully tight. If they are, then proceed with the next step:
 
Referring to the image below, loosen the locking screw #1 (5/64 Allen Key). Then with a 1/4" Allen key loosen the pivot bolt #2 about 1/2 turn ccw while gently pushing on the counterweight shaft in the RA direction. Gently! not with guerilla force please. It should stiffen up as the worm mates with the worm wheel teeth. Once it is in full mesh, tighten the pivot bolt a small amount and again feel the RA axis to make sure that it is meshed. You can then push down on the top back of the motor to bring the worm slightly out of mesh, then let go to allow the springs to pop the worm teeth back into mesh. The motor assembly should be able to rotate slightly in and out of mesh when you apply force to the back of the motor.
 
If everything feels right, re-tighten the locking screw. Then replace the inner motor cover with the shorter 4 screws (very important that you do not use the outer cover screws!!) Finish by replacing the outer cover.
 
Roland Christen
Astro-Physics Inc.
 
 
 
 
-----Original Message-----
From: davidcfinch9 via groups.io <DF121819@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 17, 2021 2:07 pm
Subject: [ap-gto] Slight Slop in the RA Axis of My Mach2
Hello Ray,
I have a slight "slop" (similar to backlash) in my RA axis when I apply light pressure in rocking the telescope back in forth, which I believe is due to insufficient mesh between the worm gear and worm wheel. The "slop" amounts to about 1/64" of play at the end of the counterweight shaft. All of the RA and DEC clutch knobs are fully tightened. I removed the RA gear box cover and everything appeared to be "normal." There is no such "slop" in the DEC axis.
Is there anything that I can do to tighten things up?
Regards,
David C. Finch
 
 
 
 
 
 
 
 
 
 

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics


Re: semi-OT: deterring critters in the obsy

Michael Hamburg
 

My biggest problem has always ben mice! The best approach has been spring traps to keep down the population from breeding. There is no 100% elimination when you are in the country.

Best wishes, Michael


On Saturday, September 18, 2021, 10:04:33 AM EDT, M Hambrick <mhambrick563@...> wrote:


Hi Dale

I used to feel the same as you about spiders and left them alone so they would eat the other insects. That was a mistake. Once they get a foothold they are hard to get rid of. 

As for wasps and hornets, the mud daubers are the worst. It is very difficult to completely remove the residue from their mud nests. I suggest aggressively controlling these insects.

I like pyrethrin insecticides, but the Ortho Home Defense spray also seems to be pretty effective at controlling many insects, but I am not sure about spiders. If you spray the perimeter of the observatory inside and out a couple times a year at ground level and where the roof retracts that should help.

Spiders don't like light. you could also consider adding some windows and leave the shades up except when you are observing.

Mike


Re: Slight Slop in the RA Axis of My Mach2

davidcfinch9
 

Roland,

Thank you, success! Although it appeared that the pivot bolt was too LOOSE. At any rate, I jockeyed the pivot bolt around so that I got good mesh while still allowing the gears to come slightly out of mesh when pushing down on the back of the motor. With everything back together, there is no longer any “slop” in the axis.

And thank you for the quick response.

Regards,

David C. Finch

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Roland Christen via groups.io
Sent: Friday, September 17, 2021 6:20 PM
To: main@ap-gto.groups.io
Cc: george@...; howard@...; marj@...; karen@...; dave@...
Subject: Re: [ap-gto] Slight Slop in the RA Axis of My Mach2

 

Hello Dave,

 

Your pivot bolt might be too tight which is preventing the worm from pivoting fully into mesh. It's an easy adjustment.

Remove the outer motor box cover and set it aside with its 4 screws.

Remove the 4 screws that hold the inner cover and put those screws aside in another place, but do not mix them with the outer screws!

Now slide the inner cover back and out of the way to expose the worm assembly. You don't need to remove it entirely.

 

First make sure that the 3 Allen screws that hold the motor assembly to the RA axis are fully tight. If they are, then proceed with the next step:

 

Referring to the image below, loosen the locking screw #1 (5/64 Allen Key). Then with a 1/4" Allen key loosen the pivot bolt #2 about 1/2 turn ccw while gently pushing on the counterweight shaft in the RA direction. Gently! not with guerilla force please. It should stiffen up as the worm mates with the worm wheel teeth. Once it is in full mesh, tighten the pivot bolt a small amount and again feel the RA axis to make sure that it is meshed. You can then push down on the top back of the motor to bring the worm slightly out of mesh, then let go to allow the springs to pop the worm teeth back into mesh. The motor assembly should be able to rotate slightly in and out of mesh when you apply force to the back of the motor.

 

If everything feels right, re-tighten the locking screw. Then replace the inner motor cover with the shorter 4 screws (very important that you do not use the outer cover screws!!) Finish by replacing the outer cover.

 

Roland Christen

Astro-Physics Inc.

 

 

 

 

-----Original Message-----
From: davidcfinch9 via groups.io <DF121819@...>
To: main@ap-gto.groups.io
Sent: Fri, Sep 17, 2021 2:07 pm
Subject: [ap-gto] Slight Slop in the RA Axis of My Mach2

Hello Ray,

I have a slight "slop" (similar to backlash) in my RA axis when I apply light pressure in rocking the telescope back in forth, which I believe is due to insufficient mesh between the worm gear and worm wheel. The "slop" amounts to about 1/64" of play at the end of the counterweight shaft. All of the RA and DEC clutch knobs are fully tightened. I removed the RA gear box cover and everything appeared to be "normal." There is no such "slop" in the DEC axis.

Is there anything that I can do to tighten things up?

Regards,

David C. Finch

 

 

 

 

 

 

 

 

 

 


--
Roland Christen
Astro-Physics


Re: Dovelm162 springs too short or assembled wrong?

skester@...
 

I have the same issue described here but with the DOVEDV10 plate I received with my 1100GTO in April of this year.  The springs run out of travel before the clamps have fully retracted.  It's not a big deal for me as I mount the scope rings first and simply push the clamps all the way back prior to doing so.  But I wanted AP to be aware the same issue is occurring with the 10" dovetail plate.


Re: semi-OT: deterring critters in the obsy

M Hambrick
 

Hi Dale

I used to feel the same as you about spiders and left them alone so they would eat the other insects. That was a mistake. Once they get a foothold they are hard to get rid of. 

As for wasps and hornets, the mud daubers are the worst. It is very difficult to completely remove the residue from their mud nests. I suggest aggressively controlling these insects.

I like pyrethrin insecticides, but the Ortho Home Defense spray also seems to be pretty effective at controlling many insects, but I am not sure about spiders. If you spray the perimeter of the observatory inside and out a couple times a year at ground level and where the roof retracts that should help.

Spiders don't like light. you could also consider adding some windows and leave the shades up except when you are observing.

Mike


Re: AP1200 rotating pier adapter

Luke Dodd
 

Hi Mike,

 

Great help thanks, I will order the SPA

 

Regards Luke

 

Sent from Mail for Windows

 

From: Mike Dodd
Sent: Saturday, 18 September 2021 11:13 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1200 rotating pier adapter

 

On 9/17/2021 8:11 PM, Luke Dodd wrote:

> What is available to mount the AP1200 onto a

> permanent pier.

 

I have a 1200, and use the SPA Standard Pier Adapter

<https://www.astro-physics.com/900spa> to mount it on my concrete pier.

The pier is 12" diameter, but reduces to 10" at the top, and the SPA

attaches to 5/8" threaded steel rods embedded in that.

 

This link: <http://astronomy.mdodd.com/observatory.html#PierBolts>

illustrates and describes what I did.

 

One note: The cap screws attaching the SPA to the rods are 1/4"-20. I

drilled a #11 hole in one end of each rod, then tapped that for 1/4"-20.

This hole should be coaxial with the rod, so a vise on a drill press is

helpful. I'm fortunate to have a mini-lathe, so I chucked the rod in the

lathe, and easily drilled coaxial holes.

 

My SPA is circa 2005, and I don't know if the current one is the same.

 

--- Mike

http://astronomy.mdodd.com

 

 

 

 

 

 

 


Re: AP1200 rotating pier adapter

Mike Dodd
 

On 9/17/2021 8:11 PM, Luke Dodd wrote:
What is available to mount the AP1200 onto a
permanent pier.
I have a 1200, and use the SPA Standard Pier Adapter <https://www.astro-physics.com/900spa> to mount it on my concrete pier. The pier is 12" diameter, but reduces to 10" at the top, and the SPA attaches to 5/8" threaded steel rods embedded in that.

This link: <http://astronomy.mdodd.com/observatory.html#PierBolts> illustrates and describes what I did.

One note: The cap screws attaching the SPA to the rods are 1/4"-20. I drilled a #11 hole in one end of each rod, then tapped that for 1/4"-20. This hole should be coaxial with the rod, so a vise on a drill press is helpful. I'm fortunate to have a mini-lathe, so I chucked the rod in the lathe, and easily drilled coaxial holes.

My SPA is circa 2005, and I don't know if the current one is the same.

--- Mike
http://astronomy.mdodd.com

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