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Thread: PHD Graph Autoguiding Optimization for Astrophotography Part 2

  1. #11
    Toml08's Avatar
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    Thanks Ken as you know it doesn't always start out that way.

    Clear skies,
    Tom.
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  2. #12
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    Mine looks like a Led Zeppelin gig with a lot of feedback!
    I reckon if I played it, I'd get Tchaikovsy doing the 1812
    NEQ6 Pro Mount.
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  3. #13
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    Quote Originally Posted by Toml08 View Post
    Thanks Ken as you know it doesn't always start out that way.

    Clear skies,
    Tom.
    No it doesn't
    I know I'm at the mounts limits and that makes matters worse.
    there is an upside.
    I'm getting a new Mount !
    Ken

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  4. #14
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    Quote Originally Posted by jenniferchristine View Post
    Mine looks like a Led Zeppelin gig with a lot of feedback!
    I reckon if I played it, I'd get Tchaikovsy doing the 1812

    Nothing wrong with Led Zeppelin
    Ken

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    During the last session my graph looked this way
    Attached Images Attached Images

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  7. #16
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    Default Back in the saddle

    Hi,

    Just getting started with my new camera and getting everything tuned up for the season.

    M27 is a stack of 3, 180 second images throught an LX200 10" at f10. The camera: SBIG ST 8300M, capture and processing in CCDOps. Autoguiding was Via a piggybacked TV Pronto and a Meade DSI IIIpro and PHD.

    I'm hoping to move my exposures up to 8 or so minutes by the end of summer,

    Dave
    Attached Images Attached Images
    LX200ACF 10" in observatory, TeleVue Pronto, Astro Tech AT65EDQ, ZWO ASI120MC, SBIG 8300M, SBIG FW5 filter wheel, Baader LRGB and 7nm Ha filter.
    Other hobbies: flying, history and woodworking,

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  9. #17
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    Default Hurray, got it to work!

    I've been struggling with trying to get PHD to work on my mount for the past couple of weeks but always ran into the same problem - during RA calibration PHD would start moving the mount to get movement in the star but it would never complete and the star would eventually walk right off the screen After a lot of reading I figured I had a balance problem; I had mounted my guide scope (Celestron TravelScope 70) off to the side of the optical tube and it was throwing everything off. Yesterday I relocated the guide scope and after it got dark enough that the camera wasn't getting washed out by moonlight I tried again. Lo and behold, Success! I ran it for just under thirty minutes and it never hiccuped, just kept sending adjustments to the mount. Tonight if I get a chance I'll try it with the camera attached and see what kind of results I get from a five or ten minute exposure. Man I'm happy I got it to work
    Attached Images Attached Images
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    Kevin AD5VG
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  11. #18
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    Kevin, good to hear you got it figured out. Good luck tonight.
    Clear skies,
    Tom.

    Quote Originally Posted by kbeverage View Post
    I've been struggling with trying to get PHD to work on my mount for the past couple of weeks but always ran into the same problem - during RA calibration PHD would start moving the mount to get movement in the star but it would never complete and the star would eventually walk right off the screen After a lot of reading I figured I had a balance problem; I had mounted my guide scope (Celestron TravelScope 70) off to the side of the optical tube and it was throwing everything off. Yesterday I relocated the guide scope and after it got dark enough that the camera wasn't getting washed out by moonlight I tried again. Lo and behold, Success! I ran it for just under thirty minutes and it never hiccuped, just kept sending adjustments to the mount. Tonight if I get a chance I'll try it with the camera attached and see what kind of results I get from a five or ten minute exposure. Man I'm happy I got it to work
    Orion SkyQuest XX12i Truss Tube.
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  12. #19
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    Well I got a chance earlier tonight (last night?) to go out and try PHD again - I had tried briefly the previous night but kept getting a 'pulse driving not available' error when connecting PHD to the mount. Puzzled over it yesterday and thought maybe I had a problem with the connection in the HC since the little lock tab had broken off the RJ11 connector. I got everything set up and when I plugged the serial cord into the HC I also put a small piece of foam in the cavity to keep the cord in the jack; seemed to work OK as I was able to connect and guide again (hooray!). Here is a screen capture from the run:


    The jerk mid-stream is when I was setting the camera for remote control (note to self: do this BEFORE startign to guide ). Since it was working and I had the camera connected I decided to do some lights on M27:
    6x300s lights
    10x300s darks
    ISO1600


    It's kind of grainy from the heavy post-process to darken the image since the moon was washing everything out but all I really cared about were the stars and they looked pretty good for a stack of five minute frames:


    So now I've convinced myself that everything is working well enough that I just placed an order for an Orion SSAG to replace the Chatcam Pro webcam as my guide camera; it should be here next Monday which is right in the middle of my weekend! Then I can connect to the autoguide port on the mount and bypass the HC completely
    Kevin AD5VG
    Astro-Tech AT72ED with AT2FF field flattener (Little Blue) and a new Meade 10" LX200 ACF (Big Blue)
    Celestron C6 and CG5
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  14. #20
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    Hi,
    I have a new problem with PHD and I'm wondering if anyone else has had the same experience.
    I had a problem with CCDOps hanging up and causing me to reboot my ST8300M camera so I switched from Windows 7 to an old (slow) Windows XP machine. That solved the CCDOps problem, but now my guiding has star trails in 300 second exposures which I did not have before. I find this curious because PemPro says my alignment is better than it was and my PEC, while not great is dramatically better than it was.

    I'm wondering if the new (old) computer is not doing the job needed and if anyone else has run into a problem where their computer could not keep up with the needs of autoguiding?

    The graphs all look pretty good, but the results are not.

    Dave
    LX200ACF 10" in observatory, TeleVue Pronto, Astro Tech AT65EDQ, ZWO ASI120MC, SBIG 8300M, SBIG FW5 filter wheel, Baader LRGB and 7nm Ha filter.
    Other hobbies: flying, history and woodworking,

 

 
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