Re: PREVIEW: Periodic Error Correction: Mount Setup?

#67055

man! tough crowd!!

i'm working on it now :)

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On Tue, Jul 7, 2020 at 8:14 PM Jim Waters <jimwaters@...> wrote:

Hi Brian - when can we expect part 3?? Thx

--

Brian?

Brian Valente

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PREVIEW: Periodic Error Correction: Mount Setup?

Jim Waters

#67054

Hi Brian - when can we expect part 3?? Thx

Re: Losmandy G11 mount-Gemini 1

#67053

Benjamin, ?hello from downunder

do you have and can use an EEPROM programmer? ?You can do it yourself.

Otherwise there are repairers in Australia (myself), UK (David) and USA (Michael) who can do it no problems, either re-flash your EEPROM or supply a replacement. ?They are not an unending source many reuse the EEPROMS. ?

There were some providers doing this (re/flash or supply) but I’m not sure they are still doing so. ?

There is version 1.05 now it offers small changes between 1.04 and 1.05 but ver 1.04 ?had significant changes from earlier versions ?

Just contact one of the repairers ax they have supply of EEPROMS and other parts to replace ?as it G1s/2s ?

Those links for parts are ok you can make them yourself ? You might be best exploring using an RS232 (or such like BT) to control the mount for Astrophotography ? You can use Gemini ASCOM and a laptop ? Since you already have a lappy (usually) it’s easy enough to make an RS232 adapter (and USB/RS232 converter) to run the mount ?

Of course you can use one of the devices you linked as well ? I’d use BT as it’s a basic low cpu demand method of dimple protocols and communication ?I do have a free design for a version I made years back ? Works ?ok ?and free. ?If your technically inclined.

Anyway ....my 2cents worth...oh replace your battery as per Gemini FAQs ?If it’s the CR2302 (every 3/4 yr) if the CR2354 (every year). ?Use Gemini ASCOM & RS232 to connect and save your Gemini settings prior to battery change .....change the battery then re-upload the Gemini settings ?easy! ?But it won’t save your PEC or pointing model! ? They only shortfall, as they are not ASCOM compliant ?

cheers enjoy

--
Brendan

Losmandy G11 mount-Gemini 1

#67052

Hi!

?

After several years I have now moore time to use my astro equipment again.

I have a Losmandy G11 (bought in 2004) with Gemini 1 (Version 3). Shall I upgrade to level 4 and how do I do this? Is the L4 much better than L3?

My goal is to start imaging and in the future use a computer to control the mount.

Anyone using Gemini 1 to take astro images?

I found three links that might be good upgrade parts? Any thoughts on links below

All help is very much appreciated!

?

/Benjamin

?

Re: How Long to Run PEMPro?

Jim Waters

#67051

Thanks Brian.

Re: How Long to Run PEMPro?

#67049

I usually run it for an hour. There is diminishing returns.?

5-6 cycles is the min for reasonable data.?

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On Mon, Jul 6, 2020 at 10:29 PM Jim Waters <jimwaters@...> wrote:

[Edited Message Follows]
Is there diminishing return on running PEMPro 7 or more worm cycles?? I have an evaluation version of PEMPro that runs for 30 minutes.? This gives me 7 worm cycles of correction data.? Ideally I would like to run 2x or 3x longer.? Is 7 worm cycles long enough to give me reasonable?PEC data?

--

Brian?

Brian Valente

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How Long to Run PEMPro?

Jim Waters

#67048
Edited

Is there diminishing return on running PEMPro 7 or more worm cycles?? I have an evaluation version of PEMPro that runs for 30 minutes.? This gives me 7 worm cycles of correction data.? Ideally I would like to run 2x or 3x longer.? Is 7 worm cycles long enough to give me reasonable?PEC data?

Re: PREVIEW: Part 2 of Periodic Error Correction: Mount Setup

#67047

Hi Rin

>>>?But oftentimes? told to go a little north in dec for backlash before beginning

?You might be thinking if calibrating for guiding? Bumping north is not necessary here as we're not guiding.?

Brian

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On Mon, Jul 6, 2020 at 8:49 PM Ron Pepitone via <rappnron=[email protected]> wrote:

Looks good
But oftentimes? told to go a little north in dec for backlash before beginning? Or Best to stay on equator? I see as you perfectly showed that it really is an eyeball of orthogonality rather than starting up Stellarium and going tords perfect meridian/equator bisection
I Don’t know if this is important or needs to be mentioned but With yourcommon ?off handed anectodotal tips ( that we all love and need ) maybe?
Thanks again
?
Will have to substitute ASCOM camera for my ASI1600mm as none in menu ( curious – such a common camera, perhaps ASCOM interface mo betta?)
?
Thanks for the Astrometry.net tutorial
?
Looking forward to more tutilage
?
Ron
?
?
Sent from for Windows 10
From: Brian Valente
Sent: Monday, July 6, 2020 8:03 PM
To: [email protected]; [email protected]
Subject: [Losmandy_users_io] PREVIEW: Part 2 of Periodic Error Correction: Mount Setup
?
Preview for you only!
?
?
?
comments/suggestions welcome
?
the summary of the setup recommendations are in the description
?
?
?
?
Thanks
?
Brian
?
Brian Valente
Losmandy Astronomical
?
Losmandy.com
Tutorials and vids at
?
?

--

Brian?

Brian Valente

portfolio

Re: PREVIEW: Part 2 of Periodic Error Correction: Mount Setup

#67046

开云体育

Looks good

But oftentimes? told to go a little north in dec for backlash before beginning? Or Best to stay on equator? I see as you perfectly showed that it really is an eyeball of orthogonality rather than starting up Stellarium and going tords perfect meridian/equator bisection
I Don’t know if this is important or needs to be mentioned but With yourcommon ?off handed anectodotal tips ( that we all love and need ) maybe?
Thanks again

?

Will have to substitute ASCOM camera for my ASI1600mm as none in menu ( curious – such a common camera, perhaps ASCOM interface mo betta?)

?

Thanks for the Astrometry.net tutorial

?

Looking forward to more tutilage

?

Ron

?

Sent from for Windows 10

Show quoted text

From: Brian Valente
Sent: Monday, July 6, 2020 8:03 PM
To: [email protected]; [email protected]
Subject: [Losmandy_users_io] PREVIEW: Part 2 of Periodic Error Correction: Mount Setup

?

Preview for you only!

?

comments/suggestions welcome

?

the summary of the setup recommendations are in the description

?

Thanks

?

Brian

?

Brian Valente

Losmandy Astronomical

?

Losmandy.com

Tutorials and vids at

?

PREVIEW: Part 2 of Periodic Error Correction: Mount Setup

Brian Valente

#67045

开云体育

Preview for you only!

?

comments/suggestions welcome

?

the summary of the setup recommendations are in the description

?

Thanks

?

Brian

?

Brian Valente

Losmandy Astronomical

?

Losmandy.com

Tutorials and vids at

?

Re: PREVIEW: New Tutorial on calculating your Image Scale

#67044

Another reason you want to use the main scope/camera is that the larger sensor area of the main camera will usually allow for more drift before the star being tracked will fall off the sensor.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): 
Author of PEMPro V3:  
Author of Astro-Physics V2 ASCOM Driver: 

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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Brian Valente
Sent: Monday, July 6, 2020 7:27 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] PREVIEW: New Tutorial on calculating your Image Scale

Hi JIm

In your case, probably either is fine

The general recommendation is that you use your existing imaging setup so you can avoid the inconvenience of
reconfiguring your telescope setup, etc.

the imaging camera + scope is preferable because it is generally more secure to the mount (i.e., no rings or other
source of possible error) and usually has a finer imaging scale, both of which improve the data you collect

if you want to send your data i'm happy to take a look at it

hth

On Mon, Jul 6, 2020 at 7:21 PM Jim Waters <jimwaters@...> wrote:

	I need to clarify.  Yes; you need to use your imaging scope.  I am not taking about PHD2 guiding.  I used
my auto-guider (QHY-5L-II) for PEMPro PEC training and my 630mm scope last week.  Are you saying I should
use my imaging camera (ASI2600MC Pro)?  Both have 3.75um pixels.

--

Brian

Brian Valente
portfolio brianvalentephotography.com  <>

Re: PREVIEW: New Tutorial on calculating your Image Scale

#67043

Hi JIm

In your case, probably either is fine

The general recommendation is that you use your existing imaging setup so you can avoid the inconvenience of reconfiguring your telescope setup, etc.

the imaging camera?+ scope is preferable because it is generally more secure to the mount (i.e., no rings or other source of possible error) and usually has a finer imaging scale, both of which improve the data you collect

if you want to send your data i'm happy to take a look at it

hth

Show quoted text

On Mon, Jul 6, 2020 at 7:21 PM Jim Waters <jimwaters@...> wrote:

I need to clarify.? Yes; you need to use your imaging scope.? I am not taking about PHD2 guiding.? I used my auto-guider (QHY-5L-II) for PEMPro PEC training and my 630mm scope last week.? Are you saying I should use my imaging camera (ASI2600MC Pro)?? Both have?3.75um pixels.

--

Brian?

Brian Valente

portfolio

Re: PREVIEW: New Tutorial on calculating your Image Scale

Jim Waters

#67042

I need to clarify.? Yes; you need to use your imaging scope.? I am not taking about PHD2 guiding.? I used my auto-guider (QHY-5L-II) for PEMPro PEC training and my 630mm scope last week.? Are you saying I should use my imaging camera (ASI2600MC Pro)?? Both have?3.75um pixels.

Re: Maintenance

#67041

开云体育

Hi Jamie,

I also use Superlube, but have not been active for past five years since my dad's health took a downturn.

Don

On 7/6/2020 1:35 PM, Jamie Amendolagine wrote:

Show quoted text

Thanks. Well, I guess I can't blame my poor guiding on the lube then:P

RA was getting quite bad all of the sudden, and I was scratching my head trying to figure out why. Dec was just peachy. I think that I found the issue last night though. I am using the newly discovered (to me) PEC algorithm in PHD, and I did not set the flag to not auto calculate the period, so the period went to the moon. I can't remember the number but it was really high. I set it back to 239.34, and told it not to do an auto calculate, and everything went back to normal again.?

I found that info in one of the posts here, can't remember where, but thanks!

Jamie

Re: Maintenance

Arun Hegde

#67040

Well, glad to hear I wasn't the only one that got caught by the Auto calculate period check box. I thought I was going nuts, kept changing it to 239.34, but it kept going up. Finally saw that the box needed to be unchecked.?

It wasn't terribly bad for me though, even with auto calculate on. I had the predictive weight set at 30 and reactive to 80, so it was mostly just reactive.

Re: PREVIEW: New Tutorial on calculating your Image Scale

#67039

Local astrometry is even easier

Andy Galasso over at PHD built Ansvr and a wizard to walk you through downloading the relevant catalogs - just install and go, no build necessary

??

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On Mon, Jul 6, 2020 at 11:02 AM Jamie Amendolagine <jamie.amendolagine@...> wrote:

Great video! The start and finish are awesome!?

Very informative, I don't know if you need to add this but you can install?
locally, on your imaging computer and it will always be there as long as you're imaging computer is. That's how mine is setup. I've found that it runs faster when it's installed locally, and is of course more reliable when I'm imaging.?

Jamie

--

Brian?

Brian Valente

portfolio

Re: PREVIEW: New Tutorial on calculating your Image Scale

#67038

Great video! The start and finish are awesome!?

Very informative, I don't know if you need to add this but you can install?
locally, on your imaging computer and it will always be there as long as you're imaging computer is. That's how mine is setup. I've found that it runs faster when it's installed locally, and is of course more reliable when I'm imaging.?

Jamie

Re: Maintenance

#67037

The PPEC auto adjust period option in PHD2 is a tricky thing

I think they originally designed it for people who didn't know the period of their mount, so it would "figure it out"

I've often found it goes into the 800 second or more periodicity, which to me is kinda crazy and gets into polar misalignment territory.?

My best results are likes yours when I enter the worm period and disable auto adjust option

Show quoted text

On Mon, Jul 6, 2020 at 10:37 AM Jamie Amendolagine <jamie.amendolagine@...> wrote:

Thanks. Well, I guess I can't blame my poor guiding on the lube then:P

RA was getting quite bad all of the sudden, and I was scratching my head trying to figure out why. Dec was just peachy. I think that I found the issue last night though. I am using the newly discovered (to me) PEC algorithm in PHD, and I did not set the flag to not auto calculate the period, so the period went to the moon. I can't remember the number but it was really high. I set it back to 239.34, and told it not to do an auto calculate, and everything went back to normal again.?

I found that info in one of the posts here, can't remember where, but thanks!

Jamie

--

Brian?

Brian Valente

portfolio

Re: Maintenance

#67036

Thanks. Well, I guess I can't blame my poor guiding on the lube then:P

RA was getting quite bad all of the sudden, and I was scratching my head trying to figure out why. Dec was just peachy. I think that I found the issue last night though. I am using the newly discovered (to me) PEC algorithm in PHD, and I did not set the flag to not auto calculate the period, so the period went to the moon. I can't remember the number but it was really high. I set it back to 239.34, and told it not to do an auto calculate, and everything went back to normal again.?

I found that info in one of the posts here, can't remember where, but thanks!

Jamie

Re: PREVIEW: New Tutorial on calculating your Image Scale

#67035

Great question -?

I covered this briefly, but to clarify, you really want to use your imaging scope. Recording your PEC data has nothing to do with guiding.?

Show quoted text

On Mon, Jul 6, 2020 at 10:25 AM Jim Waters <jimwaters@...> wrote:

Good tutorial and information but I am confused.? Shouldn't you enter your auto-guider information and not your imaging scope if you intend to use PEMPro?

--

Brian?

Brian Valente

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