Date   

Re: RAPAS on Mach2

Cheng-Yang Tan
 

Sorry, I meant "I thought it was because my PoleMaster *was mounted* on my saddle rather than on the RA rotation axis."



On Monday, April 20, 2020, 12:40:16 PM CDT, Cheng-Yang Tan via groups.io <cytan299@...> wrote:


Hi guys,
   I had the same experience with PoleMaster and Sharpcap using the PoleMaster camera for quite a while. Polar alignment was terrible after using either methods: > 10' error after checking with PHD drift align. I thought it was because my PoleMaster was not mounted on my saddle rather than on the RA rotation axis. 

  However recently, PoleMaster (without using Sharpcap) gave PA accuracy < 2'. What changed? Here's where I will start an urban legend because I can't explain it. Since I have a portable setup, I do the following after setting most of it up:
    
  
      Bad way: Previously, I always say Don't Unpark -> Yes to Popup. Finish monkeying around a bit more. Then Unpark from Park 3. Do PoleMaster routines.

      Good way: Now I say "Unpark from park 3" -> Cancel to Popup -> Park to Park 3. Finish monkeying around a bit more. Then Unpark from Last Park. Do PoleMaster routines.

   Being paranoid, I always use PHD2 to check PA with drift align (modified using Roland's routine by checking drift at the zenith rather than slewing East to do Alt adjust). Now using the "Good way", I don't need to do Az adjusts pointing south, small Alt adjusts when pointing to the zenith. And the PA errors are a lot better.

YMMV

cytan
 
  

On Monday, April 20, 2020, 12:23:49 PM CDT, Greg Salyer <astronutcase@...> wrote:


Terri, I had the same experience with PoleMaster. Just couldn’t get it closer than about 8’. However, I later found that my scope was slightly skewed from the mount. I suspect that was the problem. I fixed it but haven’t tried PoleMaster since. I just don’t want to take a chance of messing up the alignment I achieved with PEMPro.

Greg

On Apr 20, 2020, at 1:15 PM, Terri Zittritsch <theresamarie11@...> wrote:


For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.

I now have a RAPAS as well.    It's hard to know the accuracy difference, and how close you can eyeball it but the only way to do a good polar align without a computer.    I'll report back once I've adjusted the RAPAS holder after another good polar alignment.   The polemaster does require it to be darker out, especially at the higher gain settings that I seem to need to lock onto the fine adjustment stars.   I'm hopeful my experience over the past weekend is repeatable.

T


Re: RAPAS on Mach2

Cheng-Yang Tan
 

Hi guys,
   I had the same experience with PoleMaster and Sharpcap using the PoleMaster camera for quite a while. Polar alignment was terrible after using either methods: > 10' error after checking with PHD drift align. I thought it was because my PoleMaster was not mounted on my saddle rather than on the RA rotation axis. 

  However recently, PoleMaster (without using Sharpcap) gave PA accuracy < 2'. What changed? Here's where I will start an urban legend because I can't explain it. Since I have a portable setup, I do the following after setting most of it up:
    
  
      Bad way: Previously, I always say Don't Unpark -> Yes to Popup. Finish monkeying around a bit more. Then Unpark from Park 3. Do PoleMaster routines.

      Good way: Now I say "Unpark from park 3" -> Cancel to Popup -> Park to Park 3. Finish monkeying around a bit more. Then Unpark from Last Park. Do PoleMaster routines.

   Being paranoid, I always use PHD2 to check PA with drift align (modified using Roland's routine by checking drift at the zenith rather than slewing East to do Alt adjust). Now using the "Good way", I don't need to do Az adjusts pointing south, small Alt adjusts when pointing to the zenith. And the PA errors are a lot better.

YMMV

cytan
 
  

On Monday, April 20, 2020, 12:23:49 PM CDT, Greg Salyer <astronutcase@...> wrote:


Terri, I had the same experience with PoleMaster. Just couldn’t get it closer than about 8’. However, I later found that my scope was slightly skewed from the mount. I suspect that was the problem. I fixed it but haven’t tried PoleMaster since. I just don’t want to take a chance of messing up the alignment I achieved with PEMPro.

Greg

On Apr 20, 2020, at 1:15 PM, Terri Zittritsch <theresamarie11@...> wrote:


For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.

I now have a RAPAS as well.    It's hard to know the accuracy difference, and how close you can eyeball it but the only way to do a good polar align without a computer.    I'll report back once I've adjusted the RAPAS holder after another good polar alignment.   The polemaster does require it to be darker out, especially at the higher gain settings that I seem to need to lock onto the fine adjustment stars.   I'm hopeful my experience over the past weekend is repeatable.

T


Re: RAPAS on Mach2

Charles Thompson
 

I use the RAPAS each time I go out for a rough PA. I can never tell how good it is until I start up PhD2 and check it with guiding assistant. Once Polaris is behind the reticle line you can't see it to know exactly where it is. Usually I try to get it correct in altitude with it beside the line, then use the alt/az bolts to slide it in place behind the line in the polar scope (RAPAS). 

Is that similar to what everyone else does?




Thanks,
Charles

Sent from mobile device.


-------- Original message --------
From: Terri Zittritsch <theresamarie11@...>
Date: 4/20/20 12:15 PM (GMT-06:00)
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] RAPAS on Mach2

For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.

I now have a RAPAS as well.    It's hard to know the accuracy difference, and how close you can eyeball it but the only way to do a good polar align without a computer.    I'll report back once I've adjusted the RAPAS holder after another good polar alignment.   The polemaster does require it to be darker out, especially at the higher gain settings that I seem to need to lock onto the fine adjustment stars.   I'm hopeful my experience over the past weekend is repeatable.

T


Re: RAPAS on Mach2

Greg Salyer
 

Terri, I had the same experience with PoleMaster. Just couldn’t get it closer than about 8’. However, I later found that my scope was slightly skewed from the mount. I suspect that was the problem. I fixed it but haven’t tried PoleMaster since. I just don’t want to take a chance of messing up the alignment I achieved with PEMPro.

Greg

On Apr 20, 2020, at 1:15 PM, Terri Zittritsch <theresamarie11@...> wrote:


For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.

I now have a RAPAS as well.    It's hard to know the accuracy difference, and how close you can eyeball it but the only way to do a good polar align without a computer.    I'll report back once I've adjusted the RAPAS holder after another good polar alignment.   The polemaster does require it to be darker out, especially at the higher gain settings that I seem to need to lock onto the fine adjustment stars.   I'm hopeful my experience over the past weekend is repeatable.

T


Re: RAPAS on Mach2

Terri Zittritsch
 

For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.

I now have a RAPAS as well.    It's hard to know the accuracy difference, and how close you can eyeball it but the only way to do a good polar align without a computer.    I'll report back once I've adjusted the RAPAS holder after another good polar alignment.   The polemaster does require it to be darker out, especially at the higher gain settings that I seem to need to lock onto the fine adjustment stars.   I'm hopeful my experience over the past weekend is repeatable.

T


Re: Mach1 (spring loaded vers) has gear slop?

Roland Christen
 

Give George a call at AP and he will run you thru how to adjust your mount gearbox. From your description below I do not get a clear picture of what you are trying to adjust.

Roland Christen

-----Original Message-----
From: Ron Kramer <ronkramer1957@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Apr 20, 2020 11:46 am
Subject: Re: [ap-gto] Mach1 (spring loaded vers) has gear slop?

It's gotten worse and I keep thinking about that slop.  If it doesn't matter like you say, then why does the manual show how to take out the slop and tells me to check it by moving the counter balance weights. I do it  "AS THE MANUAL," tells me to?  but the thumb on the box doesn't seem to have any more play?   Last time I did this is worked, now it doesn't. 
Last night I was RMS 2.0  (really getting super poor).  

On Tue, Apr 7, 2020 at 3:52 PM Ron Kramer via groups.io <ronkramer1957=gmail.com@groups.io> wrote:
Thanks Rolando. I wondered if it was "sky" but seems to have been bad a month or more.  But you're sharing pretty much same skies as me. So I'll see how it goes.  Thanks for the reply. 
Still my shots have been fine.  (does this new group allow images?)   I HOPE... Y4 and whirlpool during recent 1/2 moon.

C-2019 Y4 Atlas-Small.jpg  

whirlppool_final---CROPPED 15300.0s-AR_LN_8.0_4.0_9-x_1.0_LZ3-NS-full-qua-mult-sc_BWMV_nor-AAD-RE-noMBB-mod-lpc-cbg-mod-lpc-cbg-lpc-cbg-St.jpg

On Mon, Apr 6, 2020 at 7:44 PM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

So my question is there another method or documentation of what I might do to take that play out of the RA mesh?
There is no reason to take out any play in RA. That axis is always running in one direction and is never reversed, so play or backlash is not an issue. It doesn't come into play at all during tracking or guiding. Leave it be.

Run Guiding Assistant and look at the natural star motion when the mount is not being guided. It will tell you instantly what the stars are doing, how much they are moving due to atmospheric motion. If you get 1 arc sec RMS of natural star motion (scintillation) then no amount of guiding will get you less error. I recently checked my skies here in Northern Illinois when it was clear on Saturday. Stars were moving around so much (probably jet Steam) that i had 0.8 arc sec RMS values of just scintillation. I could not get better then that all night long with any guide settings. It's just the way things are in spring time around here.

Rolando


-----Original Message-----
From: Ron Kramer <ronkramer1957@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Apr 6, 2020 5:41 pm
Subject: [ap-gto] Mach1 (spring loaded vers) has gear slop?

I was having superb performance over the last year. Total RMS guiding down around .24 - .32
I had some time away while swapping scopes from V1 RASA 11 to a V2 RASA 11. (very similar) V2 seems heavier. I rebalanced.
My guiding is now at best  .99 and averages around 1.50.  Good enough for decent stars at my image scale but it makes me concerned. The corrections are very abrupt. I've used PHD2 for 3 years and know it quite well for tuning. I can't seem to get it to smooth out.
I believe there was a PHD2 update during this  (good to bad shift). so it's hard to know if it's the mount or phd2. 
With that said - I feel there is a good bit of play in the RA mesh. I have taken the slop out before using the 'thumb pressure" tuning trick.  That isn't working this time.  I move the weights/top of teh scope a good bit that I think is the culprit. 
I opened the RA end of the box where the 3 gears are. (the middle gear turns freely easily). But it too seems to have some slop. ?  Meaning I can wiggle the middle gear1 bit (1/16th?) inch or could say 1.5-2mm or so before it contacts the other gears to make them move.
So my question is there another method or documentation of what I might do to take that play out of the RA mesh? 
I have seen the instructions for (old-style - no spring-loaded vers) which doesn't apply to me I don't believe. As noted above, the thumb/finger pressure on the release lever doesn't seem to work this time. Could this mean a new gear is needed in the box?  What else could I try?


Ron in Grand Rapids, MI


--


--


Re: Mach1 (spring loaded vers) has gear slop?

Ron Kramer
 

It's gotten worse and I keep thinking about that slop.  If it doesn't matter like you say, then why does the manual show how to take out the slop and tells me to check it by moving the counter balance weights. I do it  "AS THE MANUAL," tells me to?  but the thumb on the box doesn't seem to have any more play?   Last time I did this is worked, now it doesn't. 
Last night I was RMS 2.0  (really getting super poor).  

On Tue, Apr 7, 2020 at 3:52 PM Ron Kramer via groups.io <ronkramer1957=gmail.com@groups.io> wrote:
Thanks Rolando. I wondered if it was "sky" but seems to have been bad a month or more.  But you're sharing pretty much same skies as me. So I'll see how it goes.  Thanks for the reply. 
Still my shots have been fine.  (does this new group allow images?)   I HOPE... Y4 and whirlpool during recent 1/2 moon.

C-2019 Y4 Atlas-Small.jpg  

whirlppool_final---CROPPED 15300.0s-AR_LN_8.0_4.0_9-x_1.0_LZ3-NS-full-qua-mult-sc_BWMV_nor-AAD-RE-noMBB-mod-lpc-cbg-mod-lpc-cbg-lpc-cbg-St.jpg

On Mon, Apr 6, 2020 at 7:44 PM uncarollo2 <chris1011@...> via groups.io <chris1011=aol.com@groups.io> wrote:

So my question is there another method or documentation of what I might do to take that play out of the RA mesh?
There is no reason to take out any play in RA. That axis is always running in one direction and is never reversed, so play or backlash is not an issue. It doesn't come into play at all during tracking or guiding. Leave it be.

Run Guiding Assistant and look at the natural star motion when the mount is not being guided. It will tell you instantly what the stars are doing, how much they are moving due to atmospheric motion. If you get 1 arc sec RMS of natural star motion (scintillation) then no amount of guiding will get you less error. I recently checked my skies here in Northern Illinois when it was clear on Saturday. Stars were moving around so much (probably jet Steam) that i had 0.8 arc sec RMS values of just scintillation. I could not get better then that all night long with any guide settings. It's just the way things are in spring time around here.

Rolando


-----Original Message-----
From: Ron Kramer <ronkramer1957@...>
To: main <main@ap-gto.groups.io>
Sent: Mon, Apr 6, 2020 5:41 pm
Subject: [ap-gto] Mach1 (spring loaded vers) has gear slop?

I was having superb performance over the last year. Total RMS guiding down around .24 - .32
I had some time away while swapping scopes from V1 RASA 11 to a V2 RASA 11. (very similar) V2 seems heavier. I rebalanced.
My guiding is now at best  .99 and averages around 1.50.  Good enough for decent stars at my image scale but it makes me concerned. The corrections are very abrupt. I've used PHD2 for 3 years and know it quite well for tuning. I can't seem to get it to smooth out.
I believe there was a PHD2 update during this  (good to bad shift). so it's hard to know if it's the mount or phd2. 
With that said - I feel there is a good bit of play in the RA mesh. I have taken the slop out before using the 'thumb pressure" tuning trick.  That isn't working this time.  I move the weights/top of teh scope a good bit that I think is the culprit. 
I opened the RA end of the box where the 3 gears are. (the middle gear turns freely easily). But it too seems to have some slop. ?  Meaning I can wiggle the middle gear1 bit (1/16th?) inch or could say 1.5-2mm or so before it contacts the other gears to make them move.
So my question is there another method or documentation of what I might do to take that play out of the RA mesh? 
I have seen the instructions for (old-style - no spring-loaded vers) which doesn't apply to me I don't believe. As noted above, the thumb/finger pressure on the release lever doesn't seem to work this time. Could this mean a new gear is needed in the box?  What else could I try?


Ron in Grand Rapids, MI



--




Re: RAPAS on Mach2

Bill Long
 

For what its worth -- I used a polemaster and never found it to work very well, other than a rough alignment tool. I have had better results with a RAPAS unit that was calibrated after a PEMPro alignment was completed. That does a great job of getting me aligned quickly, and easily. Well before Polemaster can even display stars.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Wayne Hixson via groups.io <wayneh9026@...>
Sent: Monday, April 20, 2020 8:32 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] RAPAS on Mach2
 
Very smart deduction! Thanks! 


On Apr 20, 2020, at 6:56 AM, Terri Zittritsch <theresamarie11@...> wrote:

For those that followed this and might be considering a polemaster, and noted that I wasn't getting the result I expected, I think I've figured out why I was seeing such a poor result.     When I started using the polemaster, it was with my Atlas mounts, and given I always need to do guiding, I didn't much worry about whether I was exactly on the pole or not, and didn't bother with drift measurements.. and guiding seemed to work just fine.   And as I recall, I was always on the 2nd step for both gain and exposure time.    Fast forward to getting the Mach2.  Now I'm trying to evaluate the performance of the Mach2, so wanting to do a more accurate polar alignment, and get it done early in the evening.   So I moved to the lowest setting on gain and exposure time (screen becomes viewable earlier).. I could always see the stars, but they were dimmer and smaller, and my thinking is that smaller is better for more accurate alignment.     But, for last step, the fine adjustment monitor step (going from 5-6 arc min alignment to 30" alignment) Polemaster actually picks up some other dimmer stars..   I believe when I decreased my gain and exposure times, these stars weren't being picked up reliably in the monitor step.  
To cut off the story,I think I was basically staying at the 5-6 arc minute gross polar alignment, which is essentially what I was measuring in PHD2.   After thinking about it, I decided to go back to the higher gain and exposure time to see if it made a difference.     This past weekend, I upped the gain and exposure time on the camera, did my polar alignment, and I noted that the monitor step adjustment required more tweaking than it had needed in prior mach2 polar alignments.     In checking my drift in PHD2... I had essentially zero.   Curve jumping around due to atmosphere, but no trend whatsoever over at least 5 minutes.   

So for anyone else who's had trouble getting better than the advertised gross polar alignment on the polemaster, this could be your issue.


T
 


Re: Script to park mount at flat panel #APCC

Geof Lewis
 

I also use SGP and have a flat panel on the wall of my observatory. All I did was set a custom AltAz park position in the V2 driver so that the OTA points square to the flat panel when parked. Please note that I used to be able to park in a CW up position, but one of the V2 driver updates last year didn’t like that, so I had to move my light panel 180 degrees away to the diagonally opposite corner log my observatory, so that I could use an AltAz custom park with CW down, since when I’ve not had any issues.

Geof


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Ray Gralak <groups3@...>
Sent: Monday, April 20, 2020 4:23 pm
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Script to park mount at flat panel #APCC
 
Hi Rathi,

The attached vbscript file can slew the mount to Alt/Az coordinates and exit when the slew has completed.

You will need to change the Alt Az values in the script to the values for your flat panel. You will also need to rename the file without the ".txt". It needs to have a file extension ".vbs".

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3:  https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Rathi Banerjee
> Sent: Sunday, April 19, 2020 12:24 PM
> To: main@ap-gto.groups.io
> Subject: [ap-gto] Script to park mount at flat panel #APCC
>
> Hi everyone,
>
> Is there a way to move my telescope to a specific Alt/Az position (location of my flat panel on my observatory wall)
> via a script? I use SGP to image and it does not support going to a specified Alt/Az position to take flats, but it does
> support running a script before taking flats.
>
> Thanks,
> -Rathi.
>




Re: RAPAS on Mach2

Wayne Hixson
 

Very smart deduction! Thanks! 


On Apr 20, 2020, at 6:56 AM, Terri Zittritsch <theresamarie11@...> wrote:

For those that followed this and might be considering a polemaster, and noted that I wasn't getting the result I expected, I think I've figured out why I was seeing such a poor result.     When I started using the polemaster, it was with my Atlas mounts, and given I always need to do guiding, I didn't much worry about whether I was exactly on the pole or not, and didn't bother with drift measurements.. and guiding seemed to work just fine.   And as I recall, I was always on the 2nd step for both gain and exposure time.    Fast forward to getting the Mach2.  Now I'm trying to evaluate the performance of the Mach2, so wanting to do a more accurate polar alignment, and get it done early in the evening.   So I moved to the lowest setting on gain and exposure time (screen becomes viewable earlier).. I could always see the stars, but they were dimmer and smaller, and my thinking is that smaller is better for more accurate alignment.     But, for last step, the fine adjustment monitor step (going from 5-6 arc min alignment to 30" alignment) Polemaster actually picks up some other dimmer stars..   I believe when I decreased my gain and exposure times, these stars weren't being picked up reliably in the monitor step.  
To cut off the story,I think I was basically staying at the 5-6 arc minute gross polar alignment, which is essentially what I was measuring in PHD2.   After thinking about it, I decided to go back to the higher gain and exposure time to see if it made a difference.     This past weekend, I upped the gain and exposure time on the camera, did my polar alignment, and I noted that the monitor step adjustment required more tweaking than it had needed in prior mach2 polar alignments.     In checking my drift in PHD2... I had essentially zero.   Curve jumping around due to atmosphere, but no trend whatsoever over at least 5 minutes.   

So for anyone else who's had trouble getting better than the advertised gross polar alignment on the polemaster, this could be your issue.


T
 


Re: Script to park mount at flat panel #APCC

Ray Gralak
 

Hi Rathi,

The attached vbscript file can slew the mount to Alt/Az coordinates and exit when the slew has completed.

You will need to change the Alt Az values in the script to the values for your flat panel. You will also need to rename the file without the ".txt". It needs to have a file extension ".vbs".

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Rathi Banerjee
Sent: Sunday, April 19, 2020 12:24 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Script to park mount at flat panel #APCC

Hi everyone,

Is there a way to move my telescope to a specific Alt/Az position (location of my flat panel on my observatory wall)
via a script? I use SGP to image and it does not support going to a specified Alt/Az position to take flats, but it does
support running a script before taking flats.

Thanks,
-Rathi.


Script to park mount at flat panel #APCC

Rathi Banerjee
 

Hi everyone,

Is there a way to move my telescope to a specific Alt/Az position (location of my flat panel on my observatory wall) via a script? I use SGP to image and it does not support going to a specified Alt/Az position to take flats, but it does support running a script before taking flats.

Thanks,
-Rathi.


Ap mach 1 strange behavior

Manu <EYESTRONOMY@...>
 

Dear at ap-gto group, 
lately, i gave noticed a weird behaviour with my mach1, i guess this issue comes from my hand controller but i’m not 100% sure. 

So here is the problem : 
1-i unpark my mount (resume from park cmd)  ok
2- i slew to a star -ok 
3- i try to slowly center the star and there comes the problem as the mount refuses to move in AD and does a little move in Dec ... 
Besides, everything seems to go well and if i ask the mount to point somewhere in the sky with the hand controller, there is absolutely no bad motion and the mount perfectly slews to the object ! When i move the mount through the Asiair app, there, again it moves flawlessly same with sky safari ... so how can i be sure this is the hand controller and how to  fix this problem ?

thx for helping me out ! 

Best regards, 
manu 


Re: Absolute Encoders and Running a Pointing Model

Tony Benjamin <tonybenjamin@...>
 

There are on forever now J

 

On the pointing model…I ran one last night and noticed that while one side of the pier showed consistent numbers (such as .8 and .9) the other side was like 12 arc/min? Why does one side of the pier have a 10 fold increase in measurement over the other?

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: April 20, 2020 7:56 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Absolute Encoders and Running a Pointing Model

 

Yes! There should never be a reason to turn off the encoders.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main <main@ap-gto.groups.io>
Sent: Sat, Apr 18, 2020 11:48 pm
Subject: [ap-gto] Absolute Encoders and Running a Pointing Model

Do I leave the AE's on when creating a pointing model?


Re: Absolute Encoders and Running a Pointing Model

Roland Christen
 

Yes! There should never be a reason to turn off the encoders.

Rolando



-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main <main@ap-gto.groups.io>
Sent: Sat, Apr 18, 2020 11:48 pm
Subject: [ap-gto] Absolute Encoders and Running a Pointing Model

Do I leave the AE's on when creating a pointing model?


Re: Case Foam CUTTING PATTERNS for AP Mounts

Joel Short
 

Terri,
I did the same thing Glenn did with ONE of those Apache cases from Harbor Freight.  They are fantastic cases and very, very sturdy.  I have over 50lbs in one Apache 4800 case and I have no worries about the handle or the case.  
joel


Re: RAPAS on Mach2

Terri Zittritsch
 

For those that followed this and might be considering a polemaster, and noted that I wasn't getting the result I expected, I think I've figured out why I was seeing such a poor result.     When I started using the polemaster, it was with my Atlas mounts, and given I always need to do guiding, I didn't much worry about whether I was exactly on the pole or not, and didn't bother with drift measurements.. and guiding seemed to work just fine.   And as I recall, I was always on the 2nd step for both gain and exposure time.    Fast forward to getting the Mach2.  Now I'm trying to evaluate the performance of the Mach2, so wanting to do a more accurate polar alignment, and get it done early in the evening.   So I moved to the lowest setting on gain and exposure time (screen becomes viewable earlier).. I could always see the stars, but they were dimmer and smaller, and my thinking is that smaller is better for more accurate alignment.     But, for last step, the fine adjustment monitor step (going from 5-6 arc min alignment to 30" alignment) Polemaster actually picks up some other dimmer stars..   I believe when I decreased my gain and exposure times, these stars weren't being picked up reliably in the monitor step.  
To cut off the story,I think I was basically staying at the 5-6 arc minute gross polar alignment, which is essentially what I was measuring in PHD2.   After thinking about it, I decided to go back to the higher gain and exposure time to see if it made a difference.     This past weekend, I upped the gain and exposure time on the camera, did my polar alignment, and I noted that the monitor step adjustment required more tweaking than it had needed in prior mach2 polar alignments.     In checking my drift in PHD2... I had essentially zero.   Curve jumping around due to atmosphere, but no trend whatsoever over at least 5 minutes.   

So for anyone else who's had trouble getting better than the advertised gross polar alignment on the polemaster, this could be your issue.


T
 


Re: Case Foam CUTTING PATTERNS for AP Mounts

Terri Zittritsch
 
Edited

Glenn, Now that's a nice way to handle the weights, I like it (actually love it).     Given the cost of the weights, the cases probably are a small price to pay to keep them from flying around.   I've kept my original packaging but as with other similar packaging, the boxes will eventually fall apart.     For my 18lb weights, I wonder if 2 of those will be carry-able without ripping the handles off.   Hard to tell what weight you're putting in each one.    


Terri


Re: Case Foam CUTTING PATTERNS for AP Mounts

Terri Zittritsch
 

Thanks Eric, I've played around in mycasebuilder before, it seems a good way to go without custom patterns from A-P.   Thanks for the suggestion on the bucket boss, I'll take a look.


Terri


Re: Case Foam CUTTING PATTERNS for AP Mounts

Glenn
 

Terri,

I bought a couple of cases from Harbor Freight and made custom foam with mycasebuilder.com. The counterweights definitely need the sturdier foam because anything softer will collapse in short order. 

Kind regards,

Glenn

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