#### Balance: what happens at Meridian flip?

Tom Blahovici

Hi
I have read that best practice is to have the balance heavier on the counterweight side when imaging to the east. Ok, makes sense.
However what happens at Meridian flip? It's now completely wrong.
Explanation?
Tom

Roland Christen

For Astro-Physics mounts best practice is to balance. Our mounts have spring loaded worms, so do not need to be unbalanced.

Rolando

-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Fri, Aug 6, 2021 1:52 pm
Subject: [ap-gto] Balance: what happens at Meridian flip?

Hi
I have read that best practice is to have the balance heavier on the counterweight side when imaging to the east. Ok, makes sense.
However what happens at Meridian flip? It's now completely wrong.
Explanation?
Tom

--
Roland Christen
Astro-Physics

Jeff B

Roland, does that include the older mounts like the 900/1200 and Mach 1?

Jeff

On Fri, Aug 6, 2021 at 3:15 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
For Astro-Physics mounts best practice is to balance. Our mounts have spring loaded worms, so do not need to be unbalanced.

Rolando

-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Fri, Aug 6, 2021 1:52 pm
Subject: [ap-gto] Balance: what happens at Meridian flip?

Hi
I have read that best practice is to have the balance heavier on the counterweight side when imaging to the east. Ok, makes sense.
However what happens at Meridian flip? It's now completely wrong.
Explanation?
Tom

--
Roland Christen
Astro-Physics

Roland Christen

Yes, even the 900/1200 had spring action in the gearbox mounting. Mach1 also.

Rolando

-----Original Message-----
From: Jeff B <mnebula946@...>
To: main@ap-gto.groups.io
Sent: Fri, Aug 6, 2021 2:19 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

Roland, does that include the older mounts like the 900/1200 and Mach 1?

Jeff

On Fri, Aug 6, 2021 at 3:15 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
For Astro-Physics mounts best practice is to balance. Our mounts have spring loaded worms, so do not need to be unbalanced.

Rolando

-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Fri, Aug 6, 2021 1:52 pm
Subject: [ap-gto] Balance: what happens at Meridian flip?

Hi
I have read that best practice is to have the balance heavier on the counterweight side when imaging to the east. Ok, makes sense.
However what happens at Meridian flip? It's now completely wrong.
Explanation?
Tom

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

Worsel

Tom

This question comes up over in general imaging forums.  Some 'interesting approaches arise.

See  https://www.cloudynights.com/topic/408507-mount-balance-meridian-flip-and-automation/

Thank you, Roland and A-P, for a more elegant solution!!
"Our mounts have spring loaded worms, so do not need to be unbalanced."

Bryan

Jeff B

👍

On Fri, Aug 6, 2021 at 4:27 PM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
Tom

This question comes up over in general imaging forums.  Some 'interesting approaches arise.

See  https://www.cloudynights.com/topic/408507-mount-balance-meridian-flip-and-automation/

Thank you, Roland and A-P, for a more elegant solution!!
"Our mounts have spring loaded worms, so do not need to be unbalanced."

Bryan

Nick Iversen

But doesn't the manual (for the Mach1) say to balance slightly counterweight heavy?

Roland Christen

The manual might be a bit out of date - something we will have to fix. Balance the axes for best performance.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 7, 2021 5:57 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

But doesn't the manual (for the Mach1) say to balance slightly counterweight heavy?

--
Roland Christen
Astro-Physics

Nick Iversen

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

Roland Christen

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

Don Anderson

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

Roland Christen

The 900/1200 mounts have spring action built into the motor mounting bracket. They require meshing the teeth properly in order to take advantage of the spring action. The very early and oldest mounts had fixed brackets with no spring, and they would require careful mesh. So, it depends what vintage mount you have.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 2:01 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

Don Anderson

Mine is a 2008 vintage S/N:900712

Don Anderson

On Monday, August 9, 2021, 02:04:56 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

The 900/1200 mounts have spring action built into the motor mounting bracket. They require meshing the teeth properly in order to take advantage of the spring action. The very early and oldest mounts had fixed brackets with no spring, and they would require careful mesh. So, it depends what vintage mount you have.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 2:01 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

Roland Christen

Unfortunately doesn't tell me anything.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 5:19 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

Mine is a 2008 vintage S/N:900712

Don Anderson

On Monday, August 9, 2021, 02:04:56 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

The 900/1200 mounts have spring action built into the motor mounting bracket. They require meshing the teeth properly in order to take advantage of the spring action. The very early and oldest mounts had fixed brackets with no spring, and they would require careful mesh. So, it depends what vintage mount you have.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 2:01 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

Don Anderson

Sorry
Its an AP900GOTO purchased in May 2008.

Don Anderson

On Monday, August 9, 2021, 04:58:02 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

Unfortunately doesn't tell me anything.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 5:19 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

Mine is a 2008 vintage S/N:900712

Don Anderson

On Monday, August 9, 2021, 02:04:56 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

The 900/1200 mounts have spring action built into the motor mounting bracket. They require meshing the teeth properly in order to take advantage of the spring action. The very early and oldest mounts had fixed brackets with no spring, and they would require careful mesh. So, it depends what vintage mount you have.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 2:01 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

Roland Christen

That still doesn't tell me what kind of motor mount it has.

In any case, how long have you had the mount - since 1998 perhaps?
Does it work for you?
If so, then what you are doing must be good.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 8:28 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

Sorry
Its an AP900GOTO purchased in May 2008.

Don Anderson

On Monday, August 9, 2021, 04:58:02 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

Unfortunately doesn't tell me anything.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 5:19 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

Mine is a 2008 vintage S/N:900712

Don Anderson

On Monday, August 9, 2021, 02:04:56 p.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

The 900/1200 mounts have spring action built into the motor mounting bracket. They require meshing the teeth properly in order to take advantage of the spring action. The very early and oldest mounts had fixed brackets with no spring, and they would require careful mesh. So, it depends what vintage mount you have.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Mon, Aug 9, 2021 2:01 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

This true for the older 2008 900GOTO?

Don Anderson

On Monday, August 9, 2021, 09:48:48 a.m. MDT, Roland Christen via groups.io <chris1011@...> wrote:

With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

--
Roland Christen
Astro-Physics

W Hilmo

On that subject, are you still planning on making the new gearboxes with the disengagement lever available for older AP1100 and AP1600 mounts?

I'm currently doing declination balance for my scopes on the bench by configuring them exactly as they will be used, and then using a wooden dowel under the dovetail to find the balance point and marking it with some tape.  When I mount the scope, I position the dovetail so that the tape is directly over the declination axis.

I suspect that if I could disengage the worm, though, I could do better.

Thanks,

On 8/9/21 8:48 AM, Roland Christen via groups.io wrote:
With our spring loaded mounts balance both axes, especially Dec.

Roland

-----Original Message-----
From: Nick Iversen <inoddy@...>
To: main@ap-gto.groups.io
Sent: Sun, Aug 8, 2021 7:21 pm
Subject: Re: [ap-gto] Balance: what happens at Meridian flip?

What about dec balance? The manual says to balance camera heavy. I used to achieve counterweight heavy and camera heavy by balancing with the lens cap on. But after a while I figured that the lens cap was too heavy to do this and manual finessing was better.

--
Roland Christen
Astro-Physics

Tom Blahovici

Hi,
Yes the manual on your site, says to have the counterweight side slightly heavy as well as the camera end in dec.
Tom

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