Date   

Re: More basic mount questions

michael mccann
 

Lots of ideas. I’m liking the hydraulic table from harbor freight because I’m loading a truss tube RC, 14”, about 65lbs without focuser and the rest. So no tube rings just dovetail. I’m out in the country, listening to some roosters crowing now, and my neighbors are more than a mile away. So most of my Astro-buddies are 20 plus miles away.
I think if the scope is positioned face down and the dovetail could align with the saddle if dec clutches allow saddle to point vertical.

The tricky part is adding gear (camera, focuser guide camera, etc.) and CW . I can predetermine the center of gravity on the OTA and gear.

Still working on that. I plan to get help from my friends, but I also trying to make it easier for all of us.

Cheers


Re: More basic mount questions

Worsel
 

Michael

There was a thread a while back on loading a heavy OTA on a tall pier/mount.

https://ap-gto.groups.io/g/main/topic/82488870#78246

Useful approaches from several people, including Roland stating

"Park2 is usually recommended for easy loading. Open the rings, lift the scope up into the rings and close them.
 
Trying to load a scope that has the dovetail already attached to the scope is a nightmare. Put the dovetail into the cradle instead of trying to slide the scope with dovetail into the cradle.
 
Hint: I have never recommended using Park3 for loading a scope."


Bryan


Re: More basic mount questions

Nick Iversen
 

No need to go "some more" beyond finger tight. I have actually forgotten to tighten the clutches at all and not noticed - slewing and guiding still worked.


Re: Hello All and pardon the newbie questions.....

Eric Weiner
 

No problem. 

In hindsight you can probably get away with 2-18, 1-10, 1-5. Notice on my photo how the 10 is almost flush with the 18s up top.  The 10 is in the middle when I have my imaging train on the OTA. So, there is still wiggle room for a few extra pounds. Sure, you want to keep the inertial moment arm small by keeping the weight high up the shaft, but I believe you’ll be able to achieve balance on 55lbs with 2-18 up top and the 10 lower on the shaft. Especially if you have a 5 too for fine tuning. You can always order another 18. 

Cheers,
Eric 


On Sep 30, 2021, at 13:25, Michael Kelly <Michael@...> wrote:

 Eric, thanks for the input!  I’ve got that same honking hunk of optical magic!!  

So maybe;

3-18
1-10
1-5


Sent from Smallbiz Yahoo Mail for iPhone

On Thursday, September 30, 2021, 2:54 PM, Eric Weiner <weinere@...> wrote:

I’m assuming your Mach1 has the upgraded shaft since the previous owner is using those CW on the 1100. Make sure it’s the 1.875” shaft before ordering.

I don’t think the 30lb will fit as the highest cw on the Mach1 so keep that in mind. Mach1 owners can chime in on that.

I have a Mach2 with ~50lb of loading with my largest OTA imaging setup. I use 2 x 18lb + 1 x 10 lb. you can see that on the attached photo (setup for visual but with a honking monster of an ep attached). I also have 1 x 5lb for lighter visual configurations. You could add one more 18lb and be good.









Re: Hello All and pardon the newbie questions.....

W Hilmo
 

I run a C14 on my AP1100, which is close to 55 lb with accessories.

I use 3 of the larger diameter weights and it’s just about perfect with the weights at the top of the shaft.

The counterweights came with my 1100, which I bought used, and I have never weighed them.  I think that they are the 30 lb ones, though.

On Sep 30, 2021, at 12:04 PM, Shailesh Trivedi <strivedi@...> wrote:

In my experience if your OTA+imaging train weighs 55lbs you need more than this since it is recommended to keep the largest CWs close to the top to reduce moment arm swings and then fine balance with a lighter CW lowering on the shaft . You can begin with 1 30lbs, 2 18lb and maybe 1 10lb; also order a 5lb just for posterity.

Shailesh


Re: Dec Arc APPM mode: any l best practices for field set up

 

Hey Sébastien - just one thing I can comment on:

>>>If so, I was wondering if I should ONLY tick the "Enable Dec Arc Tracking" checkbox or if I do also need to tick the "Enable Tracking Correction" box for the Dec Arc tracking corrections to be actually sent to the mount ?

Dec Arc Tracking is a type of tracking enhancement, so you definitely need to enable tracking correction regardless of whether you use dec arc or not. Then in your case enable dec arc tracking, assuming that is your preferred approach. If you disable tracking correction, no tracking corrections are applied at all

>>>

On Thu, Sep 30, 2021 at 1:21 PM Seb@stro <sebastiendore1@...> wrote:
Hello Howard,

I'm also trying to learn the ropes of the new Dec Arc Tracking feature for portable use (with a new model each night). Please keep in mind I'm totally new at modeling in general. At this point, I believe I have quite managed to understand the global idea from the a little experimentation (did a complete Dec Arc mapping run successfully), reading the manual and some recent posts but I'm still left with the following questions about the pointing model tab in APCC.

My general understanding is that the tracking corrections will use the "all-sky algorithm" to compute the correction terms from the mapped points unless the Dec Arc Tracking is also enabled in which case another algorithm (taking also other variables into account) to compute more accurately the correction terms for the current declination arc. Am I getting this right ? 

If so, I was wondering if I should ONLY tick the "Enable Dec Arc Tracking" checkbox or if I do also need to tick the "Enable Tracking Correction" box for the Dec Arc tracking corrections to be actually sent to the mount ? It seems the latter is required from what I see in the Tracking Status window, but I would like a confirmation that both types of corrections are not conflicting with each other, meaning that it is the Dec Arc algorithm that is actually the one being used to compute the tracking corrections.

Also, would you recommend to "Enable Pointing Correction" in such a case? Maybe since the model is generally rather small (< 50 pts) the pointing corrections would not be accurate enough across the sky ? Would it harm to keep the pointing corrections enabled anyway in case I would like to switch target in the same declination range for example ? What about a target outside of the "dec arc model" range?

Thanks for your time,
Sébastien




De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Howard Hedlund <howard@...>
Envoyé : 30 septembre 2021 12:50
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Dec Arc APPM mode: any l best practices for field set up
 

Hi Andrea, for portable setups, the APCC Dec Arc feature is amazing!  It is perfect for your situation. 

 

I would definitely run 3 arcs if you can spare the time – one right on the target declination, and two more – one a couple degrees north, and the other a couple degrees south of your target dec. 

 

As for the RA density, I would experiment a little.  You presently do 2 arcs each with 10 or so points giving 20 total.  3 arcs totaling between 25 and 30 should rock!

 

Mag. 7 or Better Skies!

 

Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

www.astro-physics.com

Please include this e-mail with your response.

 

P Consider the environment before printing this e-mail.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Andrea Lucchetti
Sent: Thursday, September 30, 2021 6:16
To: main@ap-gto.groups.io
Subject: [ap-gto] Dec Arc APPM mode: any l best practices for field set up

 

Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,
Andrea



--
Brian 



Brian Valente


Re: Dec Arc APPM mode: any l best practices for field set up

Roland Christen
 

Dec arc tracking is for doing unguided imaging on one object along the track. It really isn't intended for pointing, so it is of limited use for that. If you want both, you need to make a full sky model.

Rolando

-----Original Message-----
From: Seb@stro <sebastiendore1@...>
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Sent: Thu, Sep 30, 2021 3:21 pm
Subject: Re: [ap-gto] Dec Arc APPM mode: any l best practices for field set up

Hello Howard,

I'm also trying to learn the ropes of the new Dec Arc Tracking feature for portable use (with a new model each night). Please keep in mind I'm totally new at modeling in general. At this point, I believe I have quite managed to understand the global idea from the a little experimentation (did a complete Dec Arc mapping run successfully), reading the manual and some recent posts but I'm still left with the following questions about the pointing model tab in APCC.

My general understanding is that the tracking corrections will use the "all-sky algorithm" to compute the correction terms from the mapped points unless the Dec Arc Tracking is also enabled in which case another algorithm (taking also other variables into account) to compute more accurately the correction terms for the current declination arc. Am I getting this right ? 

If so, I was wondering if I should ONLY tick the "Enable Dec Arc Tracking" checkbox or if I do also need to tick the "Enable Tracking Correction" box for the Dec Arc tracking corrections to be actually sent to the mount ? It seems the latter is required from what I see in the Tracking Status window, but I would like a confirmation that both types of corrections are not conflicting with each other, meaning that it is the Dec Arc algorithm that is actually the one being used to compute the tracking corrections.

Also, would you recommend to "Enable Pointing Correction" in such a case? Maybe since the model is generally rather small (< 50 pts) the pointing corrections would not be accurate enough across the sky ? Would it harm to keep the pointing corrections enabled anyway in case I would like to switch target in the same declination range for example ? What about a target outside of the "dec arc model" range?

Thanks for your time,
Sébastien




De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Howard Hedlund <howard@...>
Envoyé : 30 septembre 2021 12:50
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Dec Arc APPM mode: any l best practices for field set up
 
Hi Andrea, for portable setups, the APCC Dec Arc feature is amazing!  It is perfect for your situation. 
 
I would definitely run 3 arcs if you can spare the time – one right on the target declination, and two more – one a couple degrees north, and the other a couple degrees south of your target dec. 
 
As for the RA density, I would experiment a little.  You presently do 2 arcs each with 10 or so points giving 20 total.  3 arcs totaling between 25 and 30 should rock!
 
Mag. 7 or Better Skies!
 
Howard Hedlund
Astro-Physics, Inc.
AP Phone: 815-282-1513
Direct Phone:  815-315-7015
Please include this e-mail with your response.
 
P Consider the environment before printing this e-mail.
 
From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Andrea Lucchetti
Sent: Thursday, September 30, 2021 6:16
To: main@ap-gto.groups.io
Subject: [ap-gto] Dec Arc APPM mode: any l best practices for field set up
 
Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,
Andrea

--
Roland Christen
Astro-Physics


Re: Dec Arc APPM mode: any l best practices for field set up

Sébastien Doré
 

Hello Howard,

I'm also trying to learn the ropes of the new Dec Arc Tracking feature for portable use (with a new model each night). Please keep in mind I'm totally new at modeling in general. At this point, I believe I have quite managed to understand the global idea from the a little experimentation (did a complete Dec Arc mapping run successfully), reading the manual and some recent posts but I'm still left with the following questions about the pointing model tab in APCC.

My general understanding is that the tracking corrections will use the "all-sky algorithm" to compute the correction terms from the mapped points unless the Dec Arc Tracking is also enabled in which case another algorithm (taking also other variables into account) to compute more accurately the correction terms for the current declination arc. Am I getting this right ? 

If so, I was wondering if I should ONLY tick the "Enable Dec Arc Tracking" checkbox or if I do also need to tick the "Enable Tracking Correction" box for the Dec Arc tracking corrections to be actually sent to the mount ? It seems the latter is required from what I see in the Tracking Status window, but I would like a confirmation that both types of corrections are not conflicting with each other, meaning that it is the Dec Arc algorithm that is actually the one being used to compute the tracking corrections.

Also, would you recommend to "Enable Pointing Correction" in such a case? Maybe since the model is generally rather small (< 50 pts) the pointing corrections would not be accurate enough across the sky ? Would it harm to keep the pointing corrections enabled anyway in case I would like to switch target in the same declination range for example ? What about a target outside of the "dec arc model" range?

Thanks for your time,
Sébastien




De : main@ap-gto.groups.io <main@ap-gto.groups.io> de la part de Howard Hedlund <howard@...>
Envoyé : 30 septembre 2021 12:50
À : main@ap-gto.groups.io <main@ap-gto.groups.io>
Objet : Re: [ap-gto] Dec Arc APPM mode: any l best practices for field set up
 

Hi Andrea, for portable setups, the APCC Dec Arc feature is amazing!  It is perfect for your situation. 

 

I would definitely run 3 arcs if you can spare the time – one right on the target declination, and two more – one a couple degrees north, and the other a couple degrees south of your target dec. 

 

As for the RA density, I would experiment a little.  You presently do 2 arcs each with 10 or so points giving 20 total.  3 arcs totaling between 25 and 30 should rock!

 

Mag. 7 or Better Skies!

 

Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

www.astro-physics.com

Please include this e-mail with your response.

 

P Consider the environment before printing this e-mail.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Andrea Lucchetti
Sent: Thursday, September 30, 2021 6:16
To: main@ap-gto.groups.io
Subject: [ap-gto] Dec Arc APPM mode: any l best practices for field set up

 

Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,
Andrea


Re: Hello All and pardon the newbie questions.....

Michael Kelly
 

Eric, thanks for the input!  I’ve got that same honking hunk of optical magic!!  

So maybe;

3-18
1-10

On Thursday, September 30, 2021, 2:54 PM, Eric Weiner <weinere@...> wrote:

I’m assuming your Mach1 has the upgraded shaft since the previous owner is using those CW on the 1100. Make sure it’s the 1.875” shaft before ordering.

I don’t think the 30lb will fit as the highest cw on the Mach1 so keep that in mind. Mach1 owners can chime in on that.

I have a Mach2 with ~50lb of loading with my largest OTA imaging setup. I use 2 x 18lb + 1 x 10 lb. you can see that on the attached photo (setup for visual but with a honking monster of an ep attached). I also have 1 x 5lb for lighter visual configurations. You could add one more 18lb and be good.









Re: Hello All and pardon the newbie questions.....

Eric Weiner
 

I’m assuming your Mach1 has the upgraded shaft since the previous owner is using those CW on the 1100. Make sure it’s the 1.875” shaft before ordering.

I don’t think the 30lb will fit as the highest cw on the Mach1 so keep that in mind. Mach1 owners can chime in on that.

I have a Mach2 with ~50lb of loading with my largest OTA imaging setup. I use 2 x 18lb + 1 x 10 lb. you can see that on the attached photo (setup for visual but with a honking monster of an ep attached). I also have 1 x 5lb for lighter visual configurations. You could add one more 18lb and be good.


Re: Hello All and pardon the newbie questions.....

Shailesh Trivedi
 

In my experience if your OTA+imaging train weighs 55lbs you need more than this since it is recommended to keep the largest CWs close to the top to reduce moment arm swings and then fine balance with a lighter CW lowering on the shaft . You can begin with 1 30lbs, 2 18lb and maybe 1 10lb; also order a 5lb just for posterity.

Shailesh


Re: Dec Arc APPM mode: any l best practices for field set up

Andrea Lucchetti
 

Thank you Howard,
Will try this next time, I’ll let you know.
Andrea 


Re: Hello All and pardon the newbie questions.....

Michael Kelly
 

Excellent, thank you all for the responses!!

Next question is that I need to buy counterweights as the previous owner is using on his 1100. My current set up weighs about 40lbs and new scope which I should have in a few weeks will dress out at about 55lbs. How much weight will I need? 

Best,

Michael

On Thursday, September 30, 2021, 12:56:54 PM EDT, Howard Hedlund <howard@...> wrote:


We recommend both the FTDI dongles and the Keyspan by Tripp-Lite.  Both have excellent drivers.  We now sell the FTDI USB to Serial converter because we use the FTDI chipset in the GTOCP4/5.  The same FTDI driver works for both the dongle and the on-board chip. 

 

The Keyspan has the advantage of offering a utility that can be extremely handy for diagnostics.  We DO NOT recommend the cheaper and more generic Tripp-Lite converters – only the more premium Keyspans.

 

Mag. 7 or Better Skies!

 

Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

www.astro-physics.com

Please include this e-mail with your response.

 

P Consider the environment before printing this e-mail.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, September 30, 2021 8:44
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Hello All and pardon the newbie questions.....

 

I agree the USB->serial converter is all you need to be happy with the CP3.  The FTDI chipset has been the standard for about 20 years, and you can download drivers direct from them.  The Prolific chipset used to have a bad reputation, but I tried one recently, loaded the latest driver, and it worked well.   On the other hand, I tried a no-name that was about $5 from Ebay and the drivers were junk.  Kept grabbing new logical serial ports on the PC.

 

Steve 

 

Steve

 

On Wed, Sep 29, 2021 at 11:29 PM Jeffc <jeffcrilly@...> wrote:

Welcome….

> On Sep 29, 2021, at 1:34 PM, Michael Kelly <Michael@...> wrote:
>
> .  The mount I've bought has a CP3 controller and wondered some insight here in how to integrate. Do I need the CP4 to get the USB-B port which is not on a CP3 but on the CP4?


You can use a Serial -> USB adapter on the CP3.     The brand you want to buy is, i think, Tripp-Lite KeySpan.   

Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac (USA-19HS) https://www.amazon.com/dp/B0000VYJRY/ref=cm_sw_r_cp_api_glt_fabc_4SPYE16DG4W4NXRE421F

I’ve used a few different serial/usb adapters with the CP3, but iirc the KeySpan adapter was recommended, and it is the adapter I use with the CP3 and other serial needs like the robofocus (Tho I no longer use robofocus).   Other adapters might have questionable chips which aren’t as reliable.

-jeff







Re: More basic mount questions

michael mccann
 

Well , more like delegated to the light work:)


Re: Hello All and pardon the newbie questions.....

Howard Hedlund
 

We recommend both the FTDI dongles and the Keyspan by Tripp-Lite.  Both have excellent drivers.  We now sell the FTDI USB to Serial converter because we use the FTDI chipset in the GTOCP4/5.  The same FTDI driver works for both the dongle and the on-board chip. 

 

The Keyspan has the advantage of offering a utility that can be extremely handy for diagnostics.  We DO NOT recommend the cheaper and more generic Tripp-Lite converters – only the more premium Keyspans.

 

Mag. 7 or Better Skies!

 

Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

www.astro-physics.com

Please include this e-mail with your response.

 

P Consider the environment before printing this e-mail.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Steven Panish
Sent: Thursday, September 30, 2021 8:44
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Hello All and pardon the newbie questions.....

 

I agree the USB->serial converter is all you need to be happy with the CP3.  The FTDI chipset has been the standard for about 20 years, and you can download drivers direct from them.  The Prolific chipset used to have a bad reputation, but I tried one recently, loaded the latest driver, and it worked well.   On the other hand, I tried a no-name that was about $5 from Ebay and the drivers were junk.  Kept grabbing new logical serial ports on the PC.

 

Steve 

 

Steve

 

On Wed, Sep 29, 2021 at 11:29 PM Jeffc <jeffcrilly@...> wrote:

Welcome….

> On Sep 29, 2021, at 1:34 PM, Michael Kelly <Michael@...> wrote:
>
> .  The mount I've bought has a CP3 controller and wondered some insight here in how to integrate. Do I need the CP4 to get the USB-B port which is not on a CP3 but on the CP4?


You can use a Serial -> USB adapter on the CP3.     The brand you want to buy is, i think, Tripp-Lite KeySpan.   

Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac (USA-19HS) https://www.amazon.com/dp/B0000VYJRY/ref=cm_sw_r_cp_api_glt_fabc_4SPYE16DG4W4NXRE421F

I’ve used a few different serial/usb adapters with the CP3, but iirc the KeySpan adapter was recommended, and it is the adapter I use with the CP3 and other serial needs like the robofocus (Tho I no longer use robofocus).   Other adapters might have questionable chips which aren’t as reliable.

-jeff







Re: More basic mount questions

fernandorivera3
 

Michael, ownership of your new AP mount means your Losmandy & iOptron mounts will now become doorstops or paperweights 😃

Fernando


Re: Dec Arc APPM mode: any l best practices for field set up

Howard Hedlund
 

Hi Andrea, for portable setups, the APCC Dec Arc feature is amazing!  It is perfect for your situation. 

 

I would definitely run 3 arcs if you can spare the time – one right on the target declination, and two more – one a couple degrees north, and the other a couple degrees south of your target dec. 

 

As for the RA density, I would experiment a little.  You presently do 2 arcs each with 10 or so points giving 20 total.  3 arcs totaling between 25 and 30 should rock!

 

Mag. 7 or Better Skies!

 

Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

www.astro-physics.com

Please include this e-mail with your response.

 

P Consider the environment before printing this e-mail.

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Andrea Lucchetti
Sent: Thursday, September 30, 2021 6:16
To: main@ap-gto.groups.io
Subject: [ap-gto] Dec Arc APPM mode: any l best practices for field set up

 

Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,
Andrea


Re: Hello All and pardon the newbie questions.....

Steven Panish
 

I agree the USB->serial converter is all you need to be happy with the CP3.  The FTDI chipset has been the standard for about 20 years, and you can download drivers direct from them.  The Prolific chipset used to have a bad reputation, but I tried one recently, loaded the latest driver, and it worked well.   On the other hand, I tried a no-name that was about $5 from Ebay and the drivers were junk.  Kept grabbing new logical serial ports on the PC.

Steve 

Steve

On Wed, Sep 29, 2021 at 11:29 PM Jeffc <jeffcrilly@...> wrote:
Welcome….

> On Sep 29, 2021, at 1:34 PM, Michael Kelly <Michael@...> wrote:
>
> .  The mount I've bought has a CP3 controller and wondered some insight here in how to integrate. Do I need the CP4 to get the USB-B port which is not on a CP3 but on the CP4?


You can use a Serial -> USB adapter on the CP3.     The brand you want to buy is, i think, Tripp-Lite KeySpan.   

Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac (USA-19HS) https://www.amazon.com/dp/B0000VYJRY/ref=cm_sw_r_cp_api_glt_fabc_4SPYE16DG4W4NXRE421F

I’ve used a few different serial/usb adapters with the CP3, but iirc the KeySpan adapter was recommended, and it is the adapter I use with the CP3 and other serial needs like the robofocus (Tho I no longer use robofocus).   Other adapters might have questionable chips which aren’t as reliable.

-jeff








Dec Arc APPM mode: any l best practices for field set up

Andrea Lucchetti
 

Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,
Andrea


Re: Seeking CP3 Control Box with V2 Chip

Chris White
 

On Wed, Sep 29, 2021 at 10:59 PM, Marj Christen wrote:

Chris,

 

According to the APCC requirements, you only need the V chip. If the custom tracking rates are important, the V1 chip.  BTW, we can provide a loaner for you while yours is in for evaluation/repair.

 

These are the additional features in the V1 and V2.:

 

Version V2

• Optimized RA and DEC guiding corrections for Absolute and Precision Encoders.

 

Version V1

• Increased the range of the custom tracking rates from 99x to 999x. NOTE: Implemented in ASCOM V2 Driver v.5.10.00 and APCC v.1.6.0.0.

• Improved autoguider performance for mounts with Absolute Encoders or Precision Encoders.

• Fixed bug that occasionally moved DEC to the wrong place when returning from overshoot ("DEC Dither") in fork mode.

 

 

Clear Skies,

Marj Christen

Astro-Physics

11250 Forest Hills Road

Machesney Park, IL 61115

Phone: 815-282-1513

www.astro-physics.com

Wow!  You can!?  That's amazing.  :-)

I'll send an email to you to set that up.  Thank you so much!

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