Date   

Low power experience

Bill Long
 

So like a buffoon I didn't have full charge on my battery but I let it run it's course as much as it could. Thankfully it made it through the imaging for the evening with no problems.

Hours later when I woke from my slumber, the battery was quite low. I tested issuing some slews before throwing the battery on the charger and noticed it never threw a low voltage error at all. Only motor stall was thrown (en masse, spamming the APCC error dialog). 

Previously, if my mount had low power it error throw that, turn the LED yellow, and stop. The Mach 2 behavior is quite different. Probably worth looking at.

Other than that one test, the Mach 2 was a beast. Awesome guided, unguided, and it really takes to complements well. 😁


Re: Mach 2 First Impressions (Quick Post)

Bill Long
 

Sorry I was just being funny with that comment.


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Edward Beshore via groups.io <ebeshore@...>
Sent: Thursday, March 11, 2021 5:34 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach 2 First Impressions (Quick Post)
 
Hi Bill - Impressive stats on Mach 2. You are concerned about your 1100, what is its performance like with a similar setup?

Ed


Re: Quick Release Gearbox Modification for Older AP1600

Jack Huerkamp
 

Woody,

When I started this thread, I was hoping someone from AP would chime in about if or when a retrofit for the quick release gearboxes would be made available for my AP1600.  I assume that that will not become a reality and I will have to live with what I have.

Jack


Re: Quick Release Gearbox Modification for Older AP1600

Jack Huerkamp
 

Woody,

I installed the PowerWerx meter in line with the power supply yesterday and tested balance. Al was fine in RA with equal current draw while moving the mount slowly.  However, when I set the scopes parallel to the ground and moved the mount North-South, the current draw to elevate the scopes was higher than that to lower the scopes.  So I need to correct the balance on the OTAs riding on the mount.  And since I have parallel OTAs, I not only need to check balance on the scopes in the North-South direction, I also have to adjust the parallel dovetail East-West to make sure all imbalance is accounted for.

Thanks for reminding me about the meter.

Jack Huerkamp


Re: Mach 2 First Impressions (Quick Post)

Edward Beshore
 

Hi Bill - Impressive stats on Mach 2. You are concerned about your 1100, what is its performance like with a similar setup?

Ed


Re: Mach 2 First Impressions (Quick Post)

Bill Long
 

When the quality of your focus frames (admittedly on a very large 16803 chip) are the exact same, at 5 mins as they are at 5 seconds.... you know you have something great on your hands.

My 1100 cannot do this. Why that is, I am now perplexed. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Thursday, March 11, 2021 12:09 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach 2 First Impressions (Quick Post)
 
I clearly need to send my 1100 in for repair or something. This Mach 2 is killing it. Keep in mind, my 1100 has AE as well, and the Mach 2 is shredding it like lettuce. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Wednesday, March 10, 2021 10:47 PM
To: AP-GTO Groups.io <ap-gto@groups.io>
Subject: [ap-gto] Mach 2 First Impressions (Quick Post)
 
I have more work to do, but here is a PHD2 graph in its entirety from the Mach 2, 5 min Lum sub. No model, just PHD2 calibration. 

Sub here:


Note that there is a little tilt in this, not much, but was part of the test. I was testing whether or not the AP130GTX focuser was causing any sag in the train with the following gear:

FLI PL16803
FLI CFW5-7
7 x Chroma LRGB + SHO 3nm
Optec Sagitta OAG
Astro-Physics 133FF for GTX

My findings here show that the NiteCrawler focuser shows the exact same tilt pattern that the AP 130 GTX focuser shows. In both cases it is extremely minor and most imagers would not even know it was there.

That is an incredibly heavy imaging system and the GTX focuser was all the part that the NiteCrawler was. So, if you have a GTX, dont bother replacing your focuser. 🙂 

More data to come, as I have a model going, but so far I am impressed. My 1100 with encoders does not perform as well as this Mach 2. Maybe I should send it in? 😳 

-Bill



Re: Mach2 - Elongated stars

Bill Long
 

Dude there is something wrong with  your config. I literally cannot get the mount to NOT produce perfect stars. Call me if you are up and need a hand. :) 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of yanzhe liu <liuyanzhe@...>
Sent: Wednesday, March 10, 2021 10:36 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Mach2 - Elongated stars
 
Ray,

I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated 12/29/2018. Maybe I did not enable ASCOM log.

Yanzhe

On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
Yanhze,

> Where is ASCOM driver log? I dont use APCC, I use SGPro.

The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In that case, just reinstall the AP V2 driver and select the option to install it.

BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your Mach2 mount, but you must contact A-P to get it.

-Ray


> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Sunday, March 7, 2021 4:19 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>
>
>       Hi Yanzhe,
>
>       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>
>       There might be something useful there.
>
>       -Ray
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 10:12 AM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Roland,
>       >
>       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >
>       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >
>       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       > FSQ106+OAG+16803, image scale is 3.5".
>       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >
>       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I get
> good PA
>       > next time.
>       >
>       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I could
> not rotate
>       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I can
> balance
>       > DEC to see if the issue still exists.
>       >
>       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So you
> might
>       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >
>       >
>       >       Couple of questions:
>       >
>       >
>       >       1 - what's the mount's serial number
>       >       2 - which axis is the elongation
>       >       3 - which direction was the scope pointing (RA-Dec)
>       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       5 - do you have a picture of your setup?
>       >
>       >
>       >
>       >       One comment about balance - it should be easy for you to completely balance the scope with the
> clutches
>       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think this
> would
>       > have any effect, but doesn't hurt to check this.
>       >
>       >
>       >
>       >       Roland Christen
>       >       Astro-Physics Inc.
>       >
>       >
>       >
>       >
>       >       -----Original Message-----
>       >       From: yanzhe liu <liuyanzhe@...>
>       >       To: main@ap-gto.groups.io
>       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >
>       >
>       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >
>       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       The exact same telescope/CCD were used with another mount and stars were round, I am wondering
> what I
>       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       - Used OAG for guiding, so there should not be any flexure.
>       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub is
> ~0.01
>       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
> same
>       > across the image)
>       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
> one
>       > direction.
>       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the guiding/image
> be
>       > affected?
>       >
>       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
> appreciated.
>       >
>       >       --
>       >       Roland Christen
>       >       Astro-Physics
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







Re: Mach 2 First Impressions (Quick Post)

Bill Long
 

I clearly need to send my 1100 in for repair or something. This Mach 2 is killing it. Keep in mind, my 1100 has AE as well, and the Mach 2 is shredding it like lettuce. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Wednesday, March 10, 2021 10:47 PM
To: AP-GTO Groups.io <ap-gto@groups.io>
Subject: [ap-gto] Mach 2 First Impressions (Quick Post)
 
I have more work to do, but here is a PHD2 graph in its entirety from the Mach 2, 5 min Lum sub. No model, just PHD2 calibration. 

Sub here:


Note that there is a little tilt in this, not much, but was part of the test. I was testing whether or not the AP130GTX focuser was causing any sag in the train with the following gear:

FLI PL16803
FLI CFW5-7
7 x Chroma LRGB + SHO 3nm
Optec Sagitta OAG
Astro-Physics 133FF for GTX

My findings here show that the NiteCrawler focuser shows the exact same tilt pattern that the AP 130 GTX focuser shows. In both cases it is extremely minor and most imagers would not even know it was there.

That is an incredibly heavy imaging system and the GTX focuser was all the part that the NiteCrawler was. So, if you have a GTX, dont bother replacing your focuser. 🙂 

More data to come, as I have a model going, but so far I am impressed. My 1100 with encoders does not perform as well as this Mach 2. Maybe I should send it in? 😳 

-Bill



Re: Mach 2 First Impressions (Quick Post)

Bill Long
 

Model running now and imaging unguided and frames are just as good as the guided ones. No change, because there really isnt anything to correct reactively. The 16803 chip is at home on this GTX with the field flattener! 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bill Long <bill@...>
Sent: Wednesday, March 10, 2021 10:47 PM
To: AP-GTO Groups.io <ap-gto@groups.io>
Subject: [ap-gto] Mach 2 First Impressions (Quick Post)
 
I have more work to do, but here is a PHD2 graph in its entirety from the Mach 2, 5 min Lum sub. No model, just PHD2 calibration. 

Sub here:


Note that there is a little tilt in this, not much, but was part of the test. I was testing whether or not the AP130GTX focuser was causing any sag in the train with the following gear:

FLI PL16803
FLI CFW5-7
7 x Chroma LRGB + SHO 3nm
Optec Sagitta OAG
Astro-Physics 133FF for GTX

My findings here show that the NiteCrawler focuser shows the exact same tilt pattern that the AP 130 GTX focuser shows. In both cases it is extremely minor and most imagers would not even know it was there.

That is an incredibly heavy imaging system and the GTX focuser was all the part that the NiteCrawler was. So, if you have a GTX, dont bother replacing your focuser. 🙂 

More data to come, as I have a model going, but so far I am impressed. My 1100 with encoders does not perform as well as this Mach 2. Maybe I should send it in? 😳 

-Bill



Re: counterweight up slews in APPC Pro with Sequence Generator Pro

R Botero
 

Duncan

I am not a user of SGP but have been using APCC CW up limits consistently for imaging for years. Firstly with MaxIM through MaxPilote’s automation and over the last 3 years exclusively with Voyager. I only have my East limits ticked (somehow). 

Roberto


Mach 2 First Impressions (Quick Post)

Bill Long
 

Bill Long has shared a OneDrive file with you. To view it, click the link below.
I have more work to do, but here is a PHD2 graph in its entirety from the Mach 2, 5 min Lum sub. No model, just PHD2 calibration. 

Sub here:


Note that there is a little tilt in this, not much, but was part of the test. I was testing whether or not the AP130GTX focuser was causing any sag in the train with the following gear:

FLI PL16803
FLI CFW5-7
7 x Chroma LRGB + SHO 3nm
Optec Sagitta OAG
Astro-Physics 133FF for GTX

My findings here show that the NiteCrawler focuser shows the exact same tilt pattern that the AP 130 GTX focuser shows. In both cases it is extremely minor and most imagers would not even know it was there.

That is an incredibly heavy imaging system and the GTX focuser was all the part that the NiteCrawler was. So, if you have a GTX, dont bother replacing your focuser. 🙂 

More data to come, as I have a model going, but so far I am impressed. My 1100 with encoders does not perform as well as this Mach 2. Maybe I should send it in? 😳 

-Bill



Re: Mach2 - Elongated stars

yanzhe liu
 

Ray,

I am able to run "AP Log Zipper", there are 2 files shown in the app: ap.ini and Setting.apdb, however both were dated 12/29/2018. Maybe I did not enable ASCOM log.

Yanzhe

On Sun, Mar 7, 2021 at 7:37 PM Ray Gralak <iogroups@...> wrote:
Yanhze,

> Where is ASCOM driver log? I dont use APCC, I use SGPro.

The AP V2 ASCOM driver, which you must use with SGPro, comes with a log zipper utility called "AP Log Zipper". You should be able to find it from the Windows start menu by typing that name. The utility will grab the log files for X number of days in the past. If you can't find it, you probably didn't install it when you installed the AP V2 driver. In that case, just reinstall the AP V2 driver and select the option to install it.

BTW, you can use APCC with SGPro. In fact, it is recommended. An APCC Pro license comes with your Mach2 mount, but you must contact A-P to get it.

-Ray


> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
> Sent: Sunday, March 7, 2021 4:19 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] Mach2 - Elongated stars
>
> Ray,
>
> Where is ASCOM driver log? I dont use APCC, I use SGPro.
>
> Yanzhe
>
> On Sun, Mar 7, 2021 at 10:45 AM Ray Gralak <iogroups@...> wrote:
>
>
>       Hi Yanzhe,
>
>       Can you zip and post your PHD2 logs, as well as APCC/AP V2 ASCOM driver logs?
>
>       There might be something useful there.
>
>       -Ray
>
>       > -----Original Message-----
>       > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of yanzhe liu
>       > Sent: Sunday, March 7, 2021 10:12 AM
>       > To: main@ap-gto.groups.io
>       > Subject: Re: [ap-gto] Mach2 - Elongated stars
>       >
>       > Roland,
>       >
>       > I will check my mount serial number later as I just packed everything due to rain forecast.
>       >
>       > My camera's orientation was 0/180 degree, so I assume top to bottom elongation would be DEC.
>       >
>       > I dont have any picture of my setup, I just tore it down since it will be rainy this week. My setup is
>       > FSQ106+OAG+16803, image scale is 3.5".
>       > I was imaging Rosetta Nebula, after it was just past meridian for 2-3 hours.
>       >
>       > I used PHD2 drift for PA, it reported <5' PA error, I am waiting for polemaster adapter so I can confirm I get
> good PA
>       > next time.
>       >
>       > DEC was out of balance because my setup was rear end heavy, if it was in balance position then I could
> not rotate
>       > my CCD in all directions. My guess is that the DEC balance was off by less than 1lb. In the next test, I can
> balance
>       > DEC to see if the issue still exists.
>       >
>       > My suspicion is that if DEC balance is off, then DEC might creep under gravity, even PA is perfect. So you
> might
>       > see DEC continually drift  then gets corrected by PHD2 periodically.
>       >
>       > Yanzhe
>       >
>       > On Sun, Mar 7, 2021 at 9:35 AM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:
>       >
>       >
>       >       Couple of questions:
>       >
>       >
>       >       1 - what's the mount's serial number
>       >       2 - which axis is the elongation
>       >       3 - which direction was the scope pointing (RA-Dec)
>       >       4 - what scope and focal length or what is the arc sec per pixel.
>       >       5 - do you have a picture of your setup?
>       >
>       >
>       >
>       >       One comment about balance - it should be easy for you to completely balance the scope with the
> clutches
>       > loose. Can you estimate how many lb out of balance your scope is in Dec? Normally i would not think this
> would
>       > have any effect, but doesn't hurt to check this.
>       >
>       >
>       >
>       >       Roland Christen
>       >       Astro-Physics Inc.
>       >
>       >
>       >
>       >
>       >       -----Original Message-----
>       >       From: yanzhe liu <liuyanzhe@...>
>       >       To: main@ap-gto.groups.io
>       >       Sent: Sun, Mar 7, 2021 12:44 am
>       >       Subject: [ap-gto] Mach2 - Elongated stars
>       >
>       >
>       >       Testing new mach2 for a couple of nights. It works great out of the box and I am very pleased.
>       >
>       >       One issue bothering me is that I got slightly elongated stars across the entire image (15min Ha sub).
>       >       The exact same telescope/CCD were used with another mount and stars were round, I am wondering
> what I
>       > should check (I think there was due to some setup issue, but I could not figure it out).
>       >       - Used OAG for guiding, so there should not be any flexure.
>       >       - CCD orientation was 0/180 degree. The stars were elongated top to bottom.
>       >       -  I did polar alignment with PHD2 drift align. PA error should be < 5'. The field rotation of each sub is
> ~0.01
>       > degree, much larger than the other system (but elongated stars do not look like field rotation, they were
> same
>       > across the image)
>       >       - Both RA and DEC guiding curves looked smooth, had similar RMS. DEC correction was mainly to
> one
>       > direction.
>       >       - DEC balance was slightly off, camera heavy. Is Mach2 DEC sensitive to this? Will the guiding/image
> be
>       > affected?
>       >
>       >       I dont think any of the above is of particular concern, except DEC balance. Any comment/help is
> appreciated.
>       >
>       >       --
>       >       Roland Christen
>       >       Astro-Physics
>       >
>       >
>       >
>       >
>       >
>       >
>
>
>
>
>
>
>
>
>







Re: counterweight up slews in APPC Pro with Sequence Generator Pro

 

>>>They have not figured out yet that sending the mount via a relative time move, such as is used in every autoguiding program


i am fairly sure most (all?) imaging applications that use platesolving and centering routines do this as well, i don't think it's unique to SGP

goto-platesolve-Sync and repeat until the target is within the centering tolerance



On Wed, Mar 10, 2021 at 7:07 PM Roland Christen via groups.io <chris1011=aol.com@groups.io> wrote:

I have found that CW up slews within the East limits are slow due to all the safety slews. So for example, if plate solving takes three tries, the mount will go back and forth in and out of East limits three times to move a handful of pixels.
That is because SGP sends a new co-ordinate, a co-ordinate slew, to the mount. It is basically sending the mount to a new position each time, so that always triggers a safety slew when the scope is under the mount. They have not figured out yet that sending the mount via a relative time move, such as is used in every autoguiding program, will move the mount a few pixels without encountering this safety slew issue. A relative move is a timed move at sidereal rate. So moving 15 arc seconds simply sends the mount at 1x sidereal for 1 second.

Rolando


-----Original Message-----
From: Luca Marinelli <photo@...>
To: main@ap-gto.groups.io
Sent: Wed, Mar 10, 2021 8:31 pm
Subject: Re: [ap-gto] counterweight up slews in APPC Pro with Sequence Generator Pro

Duncan,

I have used it and you don't have to do anything special in SGP. APCC has to be setup with East and West meridian limits and the checkbox to allow CW up slews within East limits needs to be checked. Ray can correct me if I am wrong. SGP will just issue a slew command to specific coordinates. APCC realizes that it can access those coordinate in a CW up position within the East limits and it goes there.

Ultimately, I stopped using this feature. While it is appealing in principle, I have found that CW up slews within the East limits are slow due to all the safety slews. So for example, if plate solving takes three tries, the mount will go back and forth in and out of East limits three times to move a handful of pixels. In the end, meridian flips are easy and work well so I find that I waste less imaging time with an automated meridian flip than the overhead of all the CW up safety slews.

Have you set up automated meridian flips in SGP? SGP is able to take full advantage of the declination-dependent meridian limits in APCC.

Luca

--
Roland Christen
Astro-Physics



--
Brian 



Brian Valente


Re: counterweight up slews in APPC Pro with Sequence Generator Pro

Roland Christen
 


I have found that CW up slews within the East limits are slow due to all the safety slews. So for example, if plate solving takes three tries, the mount will go back and forth in and out of East limits three times to move a handful of pixels.
That is because SGP sends a new co-ordinate, a co-ordinate slew, to the mount. It is basically sending the mount to a new position each time, so that always triggers a safety slew when the scope is under the mount. They have not figured out yet that sending the mount via a relative time move, such as is used in every autoguiding program, will move the mount a few pixels without encountering this safety slew issue. A relative move is a timed move at sidereal rate. So moving 15 arc seconds simply sends the mount at 1x sidereal for 1 second.

Rolando


-----Original Message-----
From: Luca Marinelli <photo@...>
To: main@ap-gto.groups.io
Sent: Wed, Mar 10, 2021 8:31 pm
Subject: Re: [ap-gto] counterweight up slews in APPC Pro with Sequence Generator Pro

Duncan,

I have used it and you don't have to do anything special in SGP. APCC has to be setup with East and West meridian limits and the checkbox to allow CW up slews within East limits needs to be checked. Ray can correct me if I am wrong. SGP will just issue a slew command to specific coordinates. APCC realizes that it can access those coordinate in a CW up position within the East limits and it goes there.

Ultimately, I stopped using this feature. While it is appealing in principle, I have found that CW up slews within the East limits are slow due to all the safety slews. So for example, if plate solving takes three tries, the mount will go back and forth in and out of East limits three times to move a handful of pixels. In the end, meridian flips are easy and work well so I find that I waste less imaging time with an automated meridian flip than the overhead of all the CW up safety slews.

Have you set up automated meridian flips in SGP? SGP is able to take full advantage of the declination-dependent meridian limits in APCC.

Luca

--
Roland Christen
Astro-Physics


Re: counterweight up slews in APPC Pro with Sequence Generator Pro

Luca Marinelli
 

Duncan,

I have used it and you don't have to do anything special in SGP. APCC has to be setup with East and West meridian limits and the checkbox to allow CW up slews within East limits needs to be checked. Ray can correct me if I am wrong. SGP will just issue a slew command to specific coordinates. APCC realizes that it can access those coordinate in a CW up position within the East limits and it goes there.

Ultimately, I stopped using this feature. While it is appealing in principle, I have found that CW up slews within the East limits are slow due to all the safety slews. So for example, if plate solving takes three tries, the mount will go back and forth in and out of East limits three times to move a handful of pixels. In the end, meridian flips are easy and work well so I find that I waste less imaging time with an automated meridian flip than the overhead of all the CW up safety slews.

Have you set up automated meridian flips in SGP? SGP is able to take full advantage of the declination-dependent meridian limits in APCC.

Luca


counterweight up slews in APPC Pro with Sequence Generator Pro

Duncan Hanford
 

Has anybody been able to make counterweight up slews work in APCC Pro when using Sequence Generator Pro Framing and Mozaic wizard to initiate the slew?


Re: Quick Release Gearbox Modification for Older AP1600

Worsel
 

Jack

I use the PowerWerx for balance on the 1100.  I slew at 255 or even 600 rate.  You can use either amps or watts.  For each axis, if I can get up versus down plus/minus 1 W (roughly plus/minus 0.1A at normal voltage), then I consider that 'balanced.' 

Bryan


Re: Quick Release Gearbox Modification for Older AP1600

Woody Schlom
 

Jack,

 

Yes on the Nylon-tipped clutch bolts, but that’s not I greased.  At least on my Mach1, I believe there’s a sleeve bearing involved and a big flat greased surface between the two parts – not the edges where the clutch bolts contact.  But our mounts are very different I’m sure.  Opposed to Takahashi or Losmandy mounts, on my Mach1, the clutch system doesn’t ride on ball or roller bearings – just greased surfaces. 

 

Don’t know why the PowerWerks meter didn’t show you current (amp) differences.  I know you’ve got a monster of a huge and powerful mount, but it should still show a current load difference for an out-of-balance mount.  Perhaps slew at a faster speed?  And instead of starting with the CW shaft level, start below level so there’s more room for it to move at a faster slew rate?

 

And do make sure you’re looking at amps and not volts.  Volts “should” stay the same.  It’s the current or amps value that should change with how hard the motor is working.

 

If your mount is anything like mine, the grease thickness in the clutch system thins over time – so friction increases over the years.  I know that when I took mine apart, there was little grease left in the clutch system and after applying new grease to the friction surfaces (not where those spring-loaded bolts press), it was a lot easier to balance.

 

I’m surprised Roland or somebody from AP hasn’t suggested something.

 

Woody

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Jack Huerkamp
Sent: Wednesday, March 10, 2021 4:27 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Quick Release Gearbox Modification for Older AP1600

 

Woody,

As far as re-greasing the clutches, I do not see a way to do that.  I removed the clutch bolts before and, if memory serves me, they had nylon tips that pressed against the internal metal disc.  

Regarding the PowerWerx in-line meter, I had purchased one years ago to do exactly what you suggested.  I placed the counterweight bar parallel to the ground on the east side of the mount, slowly slewed the weights up and down and did not see a change in current.  I then moved the mount to place the counterweights on the west side of the mount - ditto.  Maybe at that time the mount was better balanced.  I will pull out the meter and rerun the current test.

Thanks for reminding me about using the meter.

Jack


Re: Quick Release Gearbox Modification for Older AP1600

Jack Huerkamp
 

Woody,

As far as re-greasing the clutches, I do not see a way to do that.  I removed the clutch bolts before and, if memory serves me, they had nylon tips that pressed against the internal metal disc.  

Regarding the PowerWerx in-line meter, I had purchased one years ago to do exactly what you suggested.  I placed the counterweight bar parallel to the ground on the east side of the mount, slowly slewed the weights up and down and did not see a change in current.  I then moved the mount to place the counterweights on the west side of the mount - ditto.  Maybe at that time the mount was better balanced.  I will pull out the meter and rerun the current test.

Thanks for reminding me about using the meter.

Jack


Re: VIDEO - Modifying an Astro-Physics DOVEKREP to fit a 1600GTO Mount

Harley Davidson
 

Thanks Rolando.

tony

On 3/9/2021 7:13 PM, Roland Christen via groups.io wrote:
Clever!

Rolando



-----Original Message-----
From: Harley Davidson <astrocnc@...>
To: Howard (@ AP) <howard@...>; main@ap-ug.groups.io; main@ap-gto.groups.io
Sent: Tue, Mar 9, 2021 4:00 pm
Subject: [ap-gto] VIDEO - Modifying an Astro-Physics DOVEKREP to fit a 1600GTO Mount

I ended up "modifying" an Astro-Physics DOVEKREP so it would work with the 1600GTO Mount.

Modifying an Astro-Physics DOVEKREP to fit a 1600GTO Mount
https://www.youtube.com/watch?v=ULDkyZh4GqM


tony

--
Roland Christen
Astro-Physics

9961 - 9980 of 86825