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Help With APPM and Dome Slewing/Camera Image Not In Sync
Tony Benjamin
Hi,
Trying to use APPM for a mapping model but there is too much delay between the time the telescope slews to a new position (and the camera starts taking an image) and the dome rotates to that position - so I end up taking a pic of the inside of the dome and of course plate solving fails. I made a short video of the problem: https://www.youtube.com/watch?v=k6pbx_Mq-yY
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Re: CCDWare site Trojan?
Ray Gralak
Hi George,
toggle quoted messageShow quoted text
As Brian stated, PEMPro does not have a Trojan virus. You probably clicked the download button for CCD Navigator or Weather Ninja, which for some reason, sometimes gets a false positive. I asked John Smith to move the other application's download link away from PEMPro so that hopefully, others won't click the wrong link by mistake! -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-----
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Re: How to prevent small movements
Ray Gralak
Hi Konstantin,
I forgott how to prevent small movements in the cw up area, if the mount is taking small movements for dithering.I'm not sure I understand your question. Do you mean you want to prevent the mount from slewing to cw down when dithering in a cw up position? If that's the question, can you provide the mount firmware version, APCC version, and AP V2 driver version? -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-----
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Re: Delrin plugs
Joe Zeglinski
Michael,
AP sells DELRIN Clutch plugs as a kit – and I
suggest getting spares just in case you lose one, or have a problem
fitting it in. However, You will need AP’s simple but special tool
- and fair warning, it is still a bear to use successfully.
Lesson I learned with those DELRIN clutch plugs –
“Finger tight” knobs, may STILL be too tight, so you get mushroomed plugs,
very difficult to extract. Wouldn’t want to have to do that ever again, and
really admire the AP staff, if they have to do this repair.
Good luck.
Joe Z.
From: Michael Dolenga via groups.io
Sent: Sunday, August 9, 2020 9:52 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Delrin plugs Hello – I have a 900GTO mount bought new in 2011. I think the Delrin plugs have gotten compressed; I notice that when I am balancing my setup, they barely move. Probably too enthusiastic when tightening down the clutches.
I looked on the Astro-Physics site, but couldn’t find them. Does anyone know where to get a set of replacements?
Michael
Sent from Mail for Windows 10
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Delrin plugs
Michael Dolenga
Hello – I have a 900GTO mount bought new in 2011. I think the Delrin plugs have gotten compressed; I notice that when I am balancing my setup, they barely move. Probably too enthusiastic when tightening down the clutches.
I looked on the Astro-Physics site, but couldn’t find them. Does anyone know where to get a set of replacements?
Michael
Sent from Mail for Windows 10
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How to prevent small movements
Hi Ray,
I forgott how to prevent small movements in the cw up area, if the mount is taking small movements for dithering. Grüsse Konstantin v. Poschinger Hammerichstr. 5 22605 Hamburg 040/8805747 0171/1983476
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Re: CCDWare site Trojan?
CurtisC
I downloaded PEMPro 3 from CCDWare about a week ago, and I haven't seen any problems with Trojan horses.
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Re: Star Eccentricity Help
Mike Shade
Ah, OK, not a big user of PI but the chart helps. Thanks...
Mike J. Shade Mike J. Shade Photography:
In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights
International Dark Sky Association: www.darksky.org
From:
main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian
Valente
Hi Mike
I think you may be thinking of star flatness?
i snagged this description out of PI's subframe selector - btw in this doc they spec 0.42 as being perfectly round
Eccentricity is a measure of star profile distortion. Given an elliptical star profile with major axis diameter a and minor axis diameter b where a is greater than or equal to b, the star profile eccentricity equals (1 - b2 / a2)0.5, the star profile aspect ratio equals b / a and the star profile flatness equals a / b - 1. For all stars fit in an image, their Eccentricity is weighted by the StarResidual value to minimize the influence of bad fits. A distortion with an eccentricity less than about 0.42 is not perceptible to most people. The table below shows the relationship between these measures.
On Sun, Aug 9, 2020 at 12:54 PM Mike Shade <mshade@q.com> wrote:
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Re: Star Eccentricity Help
Hi Mike I think you may be thinking of star flatness? i snagged this description out of PI's subframe selector - btw in this doc they spec 0.42 as being perfectly round Eccentricity is a measure of star profile distortion. Given an elliptical star profile with major axis diameter a and minor axis diameter b where a is greater than or equal to b, the star profile eccentricity equals (1 - b2 / a2)0.5, the star profile aspect ratio equals b / a and the star profile flatness equals a / b - 1. For all stars fit in an image, their Eccentricity is weighted by the StarResidual value to minimize the influence of bad fits. A distortion with an eccentricity less than about 0.42 is not perceptible to most people. The table below shows the relationship between these measures.
On Sun, Aug 9, 2020 at 12:54 PM Mike Shade <mshade@q.com> wrote:
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Re: Star Eccentricity Help
Mike Shade
The value of .5 is stated as round, I am curious if .05 is what people mean. According the Maxim's help, a value of .1 means that the star is longer in one axis by 10%, so a value of .5 would be 50%. That would be horribly out of round. Want to make sure that I am following. With my system, PW 17/AP1600 (non AE)/STL6303E camera/Optec Gemini rotating focuser/.63" pixel/5' subs I generally get roundness values from .01 to .05, depending on where the system is pointed/seeing.
Mike J. Shade Mike J. Shade Photography:
In War: Resolution In Defeat: Defiance In Victory: Magnanimity In Peace: Goodwill Sir Winston Churchill Already, in the gathering dusk, a few of the stars are turning on their lights. Vega, the brightest one, is now dropping towards the west. Can it be half a year since I watched her April rising in the east? Low in the southwest Antares blinks a sad farwell to fall... Leslie Peltier, Starlight Nights
International Dark Sky Association: www.darksky.org
From:
main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian
Valente
>>> Is the solution a Planewave?? J
either that, or I hear AP has a 17" reflector they are working on :)
>>What should I expect for good eccentricity - .35ish??
generally eccentricity of 0.5 or lower is considered 'perceptibly round'
I'm not sure i would 'expect' that, but i would certainly aim for that
On Sun, Aug 9, 2020 at 9:10 AM Tony Benjamin <tonybenjamin@...> wrote:
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Re: Star Eccentricity Help
>>>
Is the solution a Planewave?? J either that, or I hear AP has a 17" reflector they are working on :) >>What should I expect for good eccentricity - .35ish?? generally eccentricity of 0.5 or lower is considered 'perceptibly round' I'm not sure i would 'expect' that, but i would certainly aim for that
On Sun, Aug 9, 2020 at 9:10 AM Tony Benjamin <tonybenjamin@...> wrote:
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Re: Star Eccentricity Help
Tony Benjamin
Thanks Brian. I’m sure mirror flop is a definite possibility, even with the Edge mirror being “locked down”. Is the solution a Planewave?? J
What should I expect for good eccentricity - .35ish??
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
Okay thanks
I'm poking around in your logs some, and I'm waiting to hear back from someone else I asked a Q about, but I can see your RA corrections are primarily one-sided at higher altitudes (and a corresponding increase in RA and therefore your eccentricity goes up), and as you get lower in the sky, RA corrections become more even on both sides, and your RA RMS and eccentricity both go down
My suspicion is mirror flop or something shifting in your equipment
On Sun, Aug 9, 2020 at 8:54 AM Tony Benjamin <tonybenjamin@...> wrote:
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Re: Star Eccentricity Help
Okay thanks I'm poking around in your logs some, and I'm waiting to hear back from someone else I asked a Q about, but I can see your RA corrections are primarily one-sided at higher altitudes (and a corresponding increase in RA and therefore your eccentricity goes up), and as you get lower in the sky, RA corrections become more even on both sides, and your RA RMS and eccentricity both go down My suspicion is mirror flop or something shifting in your equipment
On Sun, Aug 9, 2020 at 8:54 AM Tony Benjamin <tonybenjamin@...> wrote: No, no seperate guide scope. I'm using an Ultrastar guide camera on a QHYOAG. --
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Re: Star Eccentricity Help
Tony Benjamin
No, no seperate guide scope. I'm using an Ultrastar guide camera on a QHYOAG.
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Re: Star Eccentricity Help
Tony Benjamin
Hi Brian,
No, not yet. As I mentioned in my OP I haven't made one for the C11 yet...but will be doing so on the next clear night :)
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Re: CCDWare site Trojan?
Hi George I think that's a false positive. Also I believe that happens only when downloading the first link, which is not PEMPro. Make sure you scroll down a bit and download PEMPro and not the first link of CCDNavigator (which throws that warning)
On Sun, Aug 9, 2020 at 8:16 AM George LaBelle <george.labelle@...> wrote: I use Mawarebytes which is reporting that ccdware.com has a trojan. --
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CCDWare site Trojan?
I use Mawarebytes which is reporting that ccdware.com has a trojan.
I'd like to get PEMPRO V3. Anyone visited this site recently? Had a problem? The trojan, according to Malwarebytes was discovered in February. -- George Prineville, Oregon
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Re: Star Eccentricity Help
Roland Christen
Are you using a separate guide scope? If so, you will probably not get round stars. Off-axis guider is almost a requirement for SCTs.
Rolando
-----Original Message-----
From: Tony Benjamin <tonybenjamin@...> To: main@ap-gto.groups.io Sent: Sat, Aug 8, 2020 11:32 pm Subject: [ap-gto] Star Eccentricity Help It seems most of my subs (1 min - 2 min) have eccentricities between .5 and .6. Now at .6 I'm throwing those subs out as you can see they are not round to the naked eye. I've been forced to keep .55 and below otherwise I'm throwing out over 50% of my subs.
My imaging gear is reasonably good (AP100 GTO AE / FLI ML16200 / C11 Edge with mirror locked down). I've been using PHD2 for guiding and usually the RA/Dec and below .4 arc/sec and often sub .3 arc/sec. The AE's seem to be working just fine as a run in PEMPro shows a flat line. I checked the PA recently - but might not have since putting the C11 on the mount - would that be an area to check to see if it is askew? What should I try and do to improve the eccentricities or is this pretty much the norm for a .44 arc/sec image scale? I haven't redone a mapping model for the C11 yet - would that help at all?
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Re: Star Eccentricity Help
Hi Tony are you running a tracking model with this mount?
On Sat, Aug 8, 2020 at 11:05 PM Tony Benjamin <tonybenjamin@...> wrote:
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Re: GTOCP3 Repair?
Glad it worked Kevin. Anyone who has ever had a mount with a CP3 unit knows of the 12v power input hack. [I am assuming that it was the 12v input and not the cable contacts]. Sometimes I would get the yellow indicator light and sometimes the mount would just start working wonky but the indicator light was red. "Adjusting" the center pole on the CP3 12v input always worked.
-- Dean Jacobsen http://astrophoto.net/wp/ Image Gallery - http://astrophoto.net/wp/image-gallery/ Astrobin - https://www.astrobin.com/users/deanjacobsen/
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