Date   

Re: Flexure Measurement - How Much is Too Much ?

Mike Dodd
 

On 6/21/2021 3:29 PM, M Hambrick wrote:
Roland has stated on multiple occasions that using a separate guide
scope is not the ideal way to do guided imaging because of flexure. How
much flexure is considered excessive ?
ANY flexure is too much! :-) You can read about my experience here: <http://astronomy.mdodd.com/flexure.html>

...after a single 600 second exposure I measured the
shift in the position of the guide star centroid to be 0.053 pixels in
the X-direction, and 0.304 pixels in the Y-direction. This doesn't seem
to be too bad in the X-direction, but I am not so sure about the
Y-direction. Does anyone have any thoughts on this ?
The proof of the pudding is in the eating. If your images look good, then your flexure is so small you shouldn't have to worry about it.

--- Mike


Re: 1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

Patrick Spencer
 

Awesome, thanks so much Liam and Roland for the quick replies!

Patrick


Re: 1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

Roland Christen
 

Setting up the encoders means simply to turn them on. This can be done thru APCC just as easily. You do not need to use the APAE Utility unless you are not going to use APCC. Once the encoders have been turned on, you never need to do anything further. They will stay on forever.

The only other thing the Utility can do, which APCC can also do, is to send the mount "Home" in case you have done something to cause it to get lost.

Rolando



-----Original Message-----
From: Patrick Spencer <patrick.spencer2@...>
To: main@ap-gto.groups.io
Sent: Mon, Jun 21, 2021 2:46 pm
Subject: [ap-gto] 1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

I recently received a new 1100GTO-AEL and I've been reading all the documentation and getting ready to set everything up for first use. I am a bit confused about some language in the GTOCP4 manual regarding absolute encoders. The manual states "The APAE Utility needs to be connected to the GTOCP4 through a separate COM port from the one that is controlling the mount. This connection can be done through the GTOCP4's second RS-232 serial port or through the USB connection ..."

I plan to use Ethernet to run the mount. Does the above-quoted language mean I need a separate physical USB or serial cable to set up the encoders?

Additionally, I plan to use APCC Pro, and I understand APCC has an AE tab. Do I still need the APAE Utility? Regardless, I still have the same question about whether I need 2 separate cables to set up the mount and the encoders.

I apologize that these questions seem pretty basic, but I want to make sure I set up the mount right the first time.

Thanks for any feedback,

Patrick Spencer

--
Roland Christen
Astro-Physics


Re: 1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

 

Howdy,

 

You do not need to worry about the APAE Utility if you intend to use APCC. You can use just the ethernet port and be ready to go.

 

Liam Plybon

Astro-Physics

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Patrick Spencer
Sent: Monday, June 21, 2021 2:46 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] 1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

 

I recently received a new 1100GTO-AEL and I've been reading all the documentation and getting ready to set everything up for first use. I am a bit confused about some language in the GTOCP4 manual regarding absolute encoders. The manual states "The APAE Utility needs to be connected to the GTOCP4 through a separate COM port from the one that is controlling the mount. This connection can be done through the GTOCP4's second RS-232 serial port or through the USB connection ..."

I plan to use Ethernet to run the mount. Does the above-quoted language mean I need a separate physical USB or serial cable to set up the encoders?

Additionally, I plan to use APCC Pro, and I understand APCC has an AE tab. Do I still need the APAE Utility? Regardless, I still have the same question about whether I need 2 separate cables to set up the mount and the encoders.

I apologize that these questions seem pretty basic, but I want to make sure I set up the mount right the first time.

Thanks for any feedback,

Patrick Spencer


1100GTO-AEL - Question about encoder setup process #Absolute_Encoders

Patrick Spencer
 

I recently received a new 1100GTO-AEL and I've been reading all the documentation and getting ready to set everything up for first use. I am a bit confused about some language in the GTOCP4 manual regarding absolute encoders. The manual states "The APAE Utility needs to be connected to the GTOCP4 through a separate COM port from the one that is controlling the mount. This connection can be done through the GTOCP4's second RS-232 serial port or through the USB connection ..."

I plan to use Ethernet to run the mount. Does the above-quoted language mean I need a separate physical USB or serial cable to set up the encoders?

Additionally, I plan to use APCC Pro, and I understand APCC has an AE tab. Do I still need the APAE Utility? Regardless, I still have the same question about whether I need 2 separate cables to set up the mount and the encoders.

I apologize that these questions seem pretty basic, but I want to make sure I set up the mount right the first time.

Thanks for any feedback,

Patrick Spencer


Flexure Measurement - How Much is Too Much ?

M Hambrick
 

Roland has stated on multiple occasions that using a separate guide scope is not the ideal way to do guided imaging because of flexure. How much flexure is considered excessive ? I believe that it was also Roland who suggested a way to detect flexure by using the information box in MaxIm DL to measure the position of the guide star in the main imaging camera at the start and at the end of the guiding session. The assumption is that the guide star position in the guiding camera will not change, but if there is flexure, it can be seen as a shift in the position of the star in the main imaging camera.

I tried this the other night. It was a very short session because the seeing was so bad, but after a single 600 second exposure I measured the shift in the position of the guide star centroid to be 0.053 pixels in the X-direction, and 0.304 pixels in the Y-direction. This doesn't seem to be too bad in the X-direction, but I am not so sure about the Y-direction. Does anyone have any thoughts on this ?

Mike


Re: Mount won't connect to new(er) laptop #APCC

 

Howdy,

I would say that adding two extra connection points and an extra adapter circuit introduces more reliability issues than simply sticking with one cable. By using a USB to Ethernet adapter, not only have you failed to eliminate reliability issues with USB (after all, you are still fundamentally dependent on USB) but you have added an entire second cable with it's own possible issues. Reliability isn't necessarily defined by what connector is going into the CP4/5.

Windows does have USB power saving settings, although I don't think they would cause this issue. You can check easily by simply turning off the selective port suspension in the settings. This shouldn't affect the CP5 however, since the FTDI chip running the USB is powered by both the CP5 and the computer for maximum performance. 

Do you have the FTDI driver installed? Windows will find a driver but not necessarily the right one every time. You can find those drivers here: https://ftdichip.com/drivers/

One troubleshooting option would be to check that the digital board of the CP5 is fully seated on the main board. Power down the CP5 and use a 3/32" hex key to open up the front cover with the antenna. Inside there is a small circuit board on top of a large circuit board. Press down on the side of the small circuit board closest to the connector panel and see if it seats into place. If so, that might be the cause of your issue. I doubt this is the case, but it isn't a bad place to check.
--
Liam Plybon
Astro-Physics


Re: M16 from my new observatory

Ron Kramer
 

the sequence.  I just use this a lot and drag and drop the new target in. So load, drag drop click Run.

basic seq.jpg


On Mon, Jun 21, 2021 at 12:55 PM Ron Kramer <ronkramer1957@...> wrote:
NINA is amazing. (and free)

On Mon, Jun 21, 2021 at 12:49 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
That’s really cool. Not sure I’ll ever get to that level of remote control.

Robert 


On Jun 21, 2021, at 11:38 AM, Ron Kramer <ronkramer1957@...> wrote:


Mine, I wasn't even home during any of this. We were with friends out to eat. 
shooting Thor's helmet.

https://www.youtube.com/watch?v=GCEemL2xGRw

On Sat, Jun 19, 2021 at 3:44 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks.  I was also motivated by always wanting some land.

Robert

On Jun 19, 2021, at 2:26 PM, thefamily90 Phillips <thefamily90@...> wrote:

Gorgeous!
Now, that is dedication. Congratulations to you!

JimP

From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of DFisch <manusfisch@...>
Sent: Saturday, June 19, 2021 6:03:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M16 from my new observatory
 
You can feel the joy and satisfaction with this kind of post! Thanks for sharing and congratulation, Tom

On Sat, Jun 19, 2021 at 00:44 Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I just finished my new observatory in NW Texas and this is my first image there and with my new ZWO ASI2600MM mono cmos camera.  I am so excited to have a permanent observatory setup ready to image at any time.  It is a 4 hour drive but the skies are almost Bortle 1.

https://pbase.com/rchozick/image/171729912




--
TJF MOBILE



--



--



Re: M16 from my new observatory

Ron Kramer
 

NINA is amazing. (and free)

On Mon, Jun 21, 2021 at 12:49 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
That’s really cool. Not sure I’ll ever get to that level of remote control.

Robert 


On Jun 21, 2021, at 11:38 AM, Ron Kramer <ronkramer1957@...> wrote:


Mine, I wasn't even home during any of this. We were with friends out to eat. 
shooting Thor's helmet.

https://www.youtube.com/watch?v=GCEemL2xGRw

On Sat, Jun 19, 2021 at 3:44 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks.  I was also motivated by always wanting some land.

Robert

On Jun 19, 2021, at 2:26 PM, thefamily90 Phillips <thefamily90@...> wrote:

Gorgeous!
Now, that is dedication. Congratulations to you!

JimP

From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of DFisch <manusfisch@...>
Sent: Saturday, June 19, 2021 6:03:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M16 from my new observatory
 
You can feel the joy and satisfaction with this kind of post! Thanks for sharing and congratulation, Tom

On Sat, Jun 19, 2021 at 00:44 Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I just finished my new observatory in NW Texas and this is my first image there and with my new ZWO ASI2600MM mono cmos camera.  I am so excited to have a permanent observatory setup ready to image at any time.  It is a 4 hour drive but the skies are almost Bortle 1.

https://pbase.com/rchozick/image/171729912




--
TJF MOBILE



--




Re: M16 from my new observatory

Robert Chozick
 

That’s really cool. Not sure I’ll ever get to that level of remote control.

Robert 


On Jun 21, 2021, at 11:38 AM, Ron Kramer <ronkramer1957@...> wrote:


Mine, I wasn't even home during any of this. We were with friends out to eat. 
shooting Thor's helmet.

https://www.youtube.com/watch?v=GCEemL2xGRw

On Sat, Jun 19, 2021 at 3:44 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks.  I was also motivated by always wanting some land.

Robert

On Jun 19, 2021, at 2:26 PM, thefamily90 Phillips <thefamily90@...> wrote:

Gorgeous!
Now, that is dedication. Congratulations to you!

JimP

From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of DFisch <manusfisch@...>
Sent: Saturday, June 19, 2021 6:03:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M16 from my new observatory
 
You can feel the joy and satisfaction with this kind of post! Thanks for sharing and congratulation, Tom

On Sat, Jun 19, 2021 at 00:44 Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I just finished my new observatory in NW Texas and this is my first image there and with my new ZWO ASI2600MM mono cmos camera.  I am so excited to have a permanent observatory setup ready to image at any time.  It is a 4 hour drive but the skies are almost Bortle 1.

https://pbase.com/rchozick/image/171729912




--
TJF MOBILE



--


Re: M16 from my new observatory

Ron Kramer
 

Mine, I wasn't even home during any of this. We were with friends out to eat. 
shooting Thor's helmet.

https://www.youtube.com/watch?v=GCEemL2xGRw


On Sat, Jun 19, 2021 at 3:44 PM Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
Thanks.  I was also motivated by always wanting some land.

Robert

On Jun 19, 2021, at 2:26 PM, thefamily90 Phillips <thefamily90@...> wrote:

Gorgeous!
Now, that is dedication. Congratulations to you!

JimP

From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of DFisch <manusfisch@...>
Sent: Saturday, June 19, 2021 6:03:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] M16 from my new observatory
 
You can feel the joy and satisfaction with this kind of post! Thanks for sharing and congratulation, Tom

On Sat, Jun 19, 2021 at 00:44 Robert Chozick via groups.io <rchozick=aol.com@groups.io> wrote:
I just finished my new observatory in NW Texas and this is my first image there and with my new ZWO ASI2600MM mono cmos camera.  I am so excited to have a permanent observatory setup ready to image at any time.  It is a 4 hour drive but the skies are almost Bortle 1.

https://pbase.com/rchozick/image/171729912




--
TJF MOBILE




Re: Mount won't connect to new(er) laptop #APCC

Peter Bresler
 

You can get an Insignia Ethernet to USB adapter at Best Buy and use an Ethernet cable, which is more reliable anyway.


Re: Understanding automation-based corrections/sync #Keypad #Mach2GTO

Ray Gralak
 

So RCAL prevents a SYNC from the wrong side of the pier or more than a 5 degree single correction attempt (you
can still repeat these to get > 5 degree cumulative error). This protection is great for a mount with Relative
Encoders and probably the best it can be, but it leaves a lot on the table for a mount with Absolute Encoders.
In regards to sync/recal checking, there is no difference in the way APCC treats mounts with relative and absolute encoders. The 5 degree range check is meant to be additional check over what the ASCOM driver does (no checking at all).

-Ray


Re: Understanding automation-based corrections/sync #Keypad #Mach2GTO

Ray Gralak
 

You can do the following to reproduce the issue in just APCC:
In APCC, go to GoTo/Recall, click Load Mount RA/Dec, add 12 degrees to Dec, click Sync. Voila, the mount sync is
now off by 12 degrees.
Open up APCC Advanced Settings and make sure "Prevent Errant RECALs" is checked. If that option is enabled RECALS more than 5 degrees away will be prevented.

-Ray


Re: #Mach2GTO C14Edge HD rig - A Couple Questions #Mach2GTO

deonb
 

1) Sure. It is part #19792 from Optec.
https://www.optecinc.com/astronomy/catalog/tcf/pdf/19792_Sure-Lock_Knobs_rev1.pdf
The mirror lock knobs on the C14 EdgeHD are closer together than on the C11 EdgeHD - go figure... On the 11", the TCF-Leo fits nicely between the mirror lock knobs. On the 14" it doesn't. Note that these aren't technically needed when I have the reducer on, like in the pictures, but without the reducer, the TCF-Leo would bump into the factory mirror locks and won't fit at all. I don't know if these will fit on a C11 EdgeHD. They're great though, I much prefer their feel of them to the factory mirror lock knobs, so they're staying on regardless.

2) I'm unsure what you mean? Are you concerned my OAG pick-up prism dips into the area of my image sensor? It doesn't - the Prism is at either the top or the bottom of the sensor - not sure which, but I made sure it was on one of the two long edges of the main image sensor when I put in the OAG. The camera is a full frame (ASI6200), and I have a 54mm train at the back so it's tight, but the prism definitely doesn't dip into or shadow the image circle. I wish I could do 68mm up to the OAG, but my rotator internally is 54mm. Ether way I don't think a C14 EdgeHD will project out much further than 54mm anyway. PHD2 just see half-stars, but it works fine. Also night and day difference in guidance after switching my guide camera from a 290MM to a 174MM.

3) Yes the Sagitta has an optional focuser. Without the focuser it's still a great, slimline OAG. But I do have the focuser on there. Honestly, the 174MM instead of the 290MM was a more important change than the focuser. The 290MM needed exact focus to guide, the 174MM doesn't. It's nice for initial setup after assembly, but I don't touch it again after. On the 290MM I had to adjust the focus every few days, which is why I got the focuser, but it's no longer needed.

The Sagitta focuser goes into the same focus controller that the TCF-Leo goes into, by using Ethernet cables. The LEO is the overall primary focuser.

Note that I also have a Celestron mirror focuser on there. The reason for that is there is this delicate balance you need to play between mirror position and backfocus distance (affected by the TCF-Leo and mirror position). The Celestron focuser affects mirror position, the TCF-Leo affects backfocus position. Both can achieve focus. However, the Celestron mirror focuser sucks and does not give repeatable results (actually it's the mirror set screw rather than the focuser that's the issue). It's almost useless for doing Filter-based focus offsets. The TCF focuser is pretty much perfect and repeatable, but since it changes the backfocus, it impacts field flatness. So I want the mirror to be in focus when the TCF-Leo is dead center, since I know that's at exactly 146.05mm. But sometimes the mirror will shift so much over time (even if I lock them) that the TCF runs so far out that the edge stars start to elongate. That's where I use the mirror focuser to fix - switch the TCF back to center orientation for good backfocus, then fix up the mirror using the mirror focuser. Before I just did it manually with a Bahtinov mask, but then I have to go out to the observatory to do that.

Note that this whole setup makes the C14 EdgeHD almost comparable in cost with a PlaneWave CDK12.5. If I were to only use the C14 at 2800mm F/7 I would definitely ditch everything and just do the PlaneWave. Or even a PlaneWave CDK14 with IRF90. BUT, the C14 also has HyperStar, and it also has better planetary capabilities in the same form factor without having to change (and store) scopes. Space is of a premium to me until I build a new observatory.

My backfocus comes in nicely at 146.35mm. I actually have to add 16mm of spacers in to fill it out. Here is the full train:

-6.6mm   OPTEC #17803 - Celestron 3" to OPTEC-3600 Dovetail Mount
36.2mm   OPTEC #19740 TCF-Leo at center position
 4.0mm   OPTEC #7847 OPTEC-3000 3-inch to M54 x 0.75mm female thread adapter
 2.75mm  54mm male-male adapter
18.0mm   Pegasus Falcon Rotator
8mm      54mm x 8mm Extension Tube/Spacer
2mm      OPTEC #19951 OPTEC-3000-S short dovetail to M54 x 0.75mm male thread
38mm     OPTEC #19340 Sagitta OAG   (official specification)  --> ZWO ASI174MM 
-4.5mm  Measurement adjustment (The Sagitta is shorter than its official specification).
2mm  OPTEC #19951 OPTEC-3000-S short dovetail to M54 x 0.75mm male thread
8mm      54mm x 8mm Extension Tube/Spacer
20mm     ZWO Filter wheel
-1mm  Filter adjustment
2mm  54mm male-male
5mm  Camera tilt adapter
12.5mm  Camera - ZWO ASI6200
146.35  Total

N
ote that the original Falcon Rotator and TCF-Leo didn't fit into/over each other like that because the original motor cover was too big. I originally replaced their motor cover with a 3d printed one that I designed:
https://www.cloudynights.com/topic/725798-falcon-rotator-and-optec-tcf-leo-a-match-made-in-a-3d-printer/
Pegasus Astro liked my design and so they adopted it themselves, and sent me one of the new covers to say thanks. That's what I have on right now and what makes the Rotator fit over the TCF-Leo. I don't know if they ship the new cover by default with all Falcon Rotators now, but it's certainly available from them if you ask.

Hah on the tidy. It looks like a rats-nest when you stand next to it :)


Re: Understanding automation-based corrections/sync #Keypad #Mach2GTO

deonb
 

I'm confused by what your goal is here - it sounds like you still want centering in some form, but on the other hand you want the mount to be authoritative, which means the centering operation becomes superfluous and should be removed or turned off entirely.
My goal is to get APCC to reject sync coordinates that are in obvious error. Whether those sync coordinates are because of user error, misconfiguration etc. doesn't matter, I want APCC to reject it since it can easily tell that it's obviously wrong.

The NINA specific question I'll raise in Discord - it's just confusing the issue here. The most common way to run into this type of error is Stellarium, clicking "SYNC" before clicking "Current Object". User error, but the Mach2GTO should know better.

Note that APCC has specific protections against these kind of user error that's build for Relative Encoders to prevent misconfiguration errors from Planetarium Software. From the APCC ASCOM documentation:
https://www.gralak.com/apdriver/help/index.html?rcal_versus_sync.htm

So RCAL prevents a SYNC from the wrong side of the pier or more than a 5 degree single correction attempt (you can still repeat these to get > 5 degree cumulative error). This protection is great for a mount with Relative Encoders and probably the best it can be, but it leaves a lot on the table for a mount with Absolute Encoders.

The RCAL protection and RCAL->SYNC ASCOM translations is where I expect the protections to be - on the ASCOM boundary. However, currently APCC (or at least the way I have to set it up) seems to treat the Mach2GTO as a mount with Relative Encoders, with Relative Encoder based algorithms for corrections and protection, and it just uses the Absolute Encoder as an advisory for fine-tuning. Where I want it to use the Absolute Encoders as a source-of-truth and reject corrections that stray too far from it.


Re: Mount won't connect to new(er) laptop #APCC

Jeffc
 

Last night when setting up, I moved some cables around on my Astro computer and couldn’t connect to the Mach2 mount.   So I swapped from (iirc) COM3 to COM4.    Then “connect” worked but things were a bit weird - I didn’t get the normal “initialize mount” dialog.  APCC complained the mount wasn’t at RA 0 / DEC 90. 
I think I ended up doing the Find Home thing, and also restarting APCC. 

Fwiw I also use Device Manager a bunch to figure out COM ports.  Sometimes I unplug the USB device, then plug it in again and see which COM port shows up.  

The only other explanation for “worked for some time” is:  perhaps there is some sort of power saving feature on the Lenovo where the USB ports get powered off after some time.  Iirc there is a setting somewhere on windows to disable such power saving features. 

Hope this helps. 


On Jun 20, 2021, at 2:49 PM, Roland Christen via groups.io <chris1011@...> wrote:


I have a Lenovo also, and i usually use device Manager to find which com port Windows has decided to use for the new USB connection. Once I find that port number, I set APCC to that number. If I'm using just the ASCOM driver, I select that port number in the driver. That always establishes the connection for me.

Rolando

-----Original Message-----
From: David Woolf <go4itbass@...>
To: main@ap-gto.groups.io
Sent: Sun, Jun 20, 2021 4:32 pm
Subject: [ap-gto] Mount won't connect to new(er) laptop #APCC

Was using an older Dell, "upgraded" to Lenovo because I needed USB3 for my ZWO camera.  Now mount won't connect.  Using APCC Standard and USB connection.  I get "No response from mount"  Swapped cables twice to no effect.  Old laptop connected just fine.  Got it to connect briefly by setting primary port to COM4, which has only appeared in the dropdown list occasionally.  Dev. manager says best drivers are installed.   What's the trick?  

--
Roland Christen
Astro-Physics


Re: Mount won't connect to new(er) laptop #APCC

Roland Christen
 

I have a Lenovo also, and i usually use device Manager to find which com port Windows has decided to use for the new USB connection. Once I find that port number, I set APCC to that number. If I'm using just the ASCOM driver, I select that port number in the driver. That always establishes the connection for me.

Rolando

-----Original Message-----
From: David Woolf <go4itbass@...>
To: main@ap-gto.groups.io
Sent: Sun, Jun 20, 2021 4:32 pm
Subject: [ap-gto] Mount won't connect to new(er) laptop #APCC

Was using an older Dell, "upgraded" to Lenovo because I needed USB3 for my ZWO camera.  Now mount won't connect.  Using APCC Standard and USB connection.  I get "No response from mount"  Swapped cables twice to no effect.  Old laptop connected just fine.  Got it to connect briefly by setting primary port to COM4, which has only appeared in the dropdown list occasionally.  Dev. manager says best drivers are installed.   What's the trick?  

--
Roland Christen
Astro-Physics


Mount won't connect to new(er) laptop #APCC

David Woolf
 

Was using an older Dell, "upgraded" to Lenovo because I needed USB3 for my ZWO camera.  Now mount won't connect.  Using APCC Standard and USB connection.  I get "No response from mount"  Swapped cables twice to no effect.  Old laptop connected just fine.  Got it to connect briefly by setting primary port to COM4, which has only appeared in the dropdown list occasionally.  Dev. manager says best drivers are installed.   What's the trick?  


Re: #Mach2GTO C14Edge HD rig - A Couple Questions #Mach2GTO

Greg Vaughn
 

Hi Deonb,

 

Thanks for sharing the photos of your rig.  Very impressive.

 

Wanted to ask just a few questions about your rig:

 

  1. The mirror locks on your Edge 14 appear to have been converted from the pointed plastic ones to flat knobs.   Can I ask where you found these or whether they came with the C14 Edge?   I have a C11 Edge and those locks are important but often seem to get in the way when changing equipment in the image train.
  2. I just recently assembled a ZWO MM CMOS camera, a filter wheel and an OAG with guide camera.   I used a very similar ZWO camera for the guide camera, but it looks like I oriented it differently than yours.   Mine has the long dimension tangential to the image circle.  It looks like you have it orthogonal.   Is this to make sure that your sensor dips into the image circle?  Curious about your thought process and any common practices in this choice that I may not be aware of.
  3. Is the ‘Saggita’ OPTEC device a focuser for your guide camera?   If so, what are you using for your primary focuser (is that the OPTEC Leo?) and any thoughts or lessons learned about these choices?  No problem fitting everything in within the backfocus spec for the reducer?

 

Again, thanks for sharing quality photos of your rig and your observatory – looks very efficient and tidy as well.  Clearly oriented for remote and unattended operation!

 

Clear skies!

 

Cheers,

Greg

 

Greg Vaughn

Alexandria, VA


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