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frugal

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About frugal

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    Proto Star

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  • Interests
    Astronomy, Woodwork, Trail Running
  • Location
    Gloucestershire
  1. frugal

    Arduino Ascom focuser Mark2

    Unfortunately my mounting technique caused some problems. It made the scope far too camera heavy, and the mounting box also clipped the altitude adjustment bolt. So I have had to take it off again until I can come up with a new mounting approach
  2. frugal

    Just shimmed my 2inch focuser. Wow!

    I probably wasn't clear, by "the roller" I meant the bar that runs from one focus wheel to the other. My ED80 focuser works by having the metal bar that the focus wheels are connected to rub against the focus tube. The whole reason that the focuser seems to work is because there is friction between the metal bar and the metal draw tube. Obviously you don't want PTFE to make this bit slippery
  3. frugal

    Just shimmed my 2inch focuser. Wow!

    What does the PTFE rub against? Is it the metal draw tube? I presume that the roller connected to the focus wheel does not touch the PTFE?
  4. Alas, I did not manage to capture any meteors on camera, but the image did come out to be a fairly good wide field shot of the sky. MY field of view calculations must have been out, as I have got a lot more sky in the frame than I expected. I was anticipating only just getting Vega and the square of Hercules in frame, but I have managed a lot more to the right of Hercules as well. As I was shooting across town there were some horrible gradients that I could not get rid of even after spending about an hour with PixInsights back ground extraction tools. You can also just about make out Comet P41-Tuttle between Hercules and Draco.
  5. I have not worked up the courage to tear apart £1,400 worth of mount yet. I have read the stripdown document and it scares me somewhat. I am the sort of person who always ends up with a couple of screws left over after that kind of operation.
  6. So if I nudge the scope a little West before I start the calibration and the problem goes away then it is probably backlash. If I still have the problem then it is more likely to be balance or binding?
  7. I made that I was on the West side of the Meridian, so I had 11 and a half hours to get the calibration sorted The PHD docs just state that the discrepancy between RA and Dec rates indicates a problem, but gives no clues as to what kind of problem it might be. The Dec rate at 7.4 is pretty close to the rate it should be for 0.5 guide rate, so I am assuming that the problem lies in RA.
  8. It is a clear night at last. I do have to go to work in the morning, but I have a couple of hours to try to crack this PHD issue. So I point at the Southern sky just by the Celestial equator: I run the Calibration on this star and I get a fun new error that I have not had before: hmmmm.... I am currently running the guiding assistant to see if that helps.
  9. What do you have your horizontal axis set to in PHD when you do this? I generally use 100 readiness and 2 second exposures. I generally let it do at least 50 of them before I adjust (so 100 seconds)
  10. frugal

    Stellarium 0.90.0.xxxx

    I thought that Bleeding Edge was fairly common parlance. Cutting Edge is the latest greatest thing; Bleeding Edge is the next Cutting Edge, but still under development so you often get cut.
  11. I was imaging the Lyrids from 11pm to 3am when they went over the house (when the polar-scope batteries on the Astrotrac died, so my attempts at re-positioning the tripod failed). I saw a couple of short small meteors, but none of them made it to the images based on my quick look. I will go over them in more detail and hope for something faint. Lovely images of the star filled sky when I quickly stacked them in PixInsight, so it was not a complete loss. It was dark enough to faintly see the milky way at about 3am as it rose through the murk of the atmosphere. I tried to polar align by eye without the polarscope and image Cygnus, but I was so far out that there was horrible field rotation.
  12. Looks like the cloud might not be as bad as I thought. Astrotrac set up and taking 2 minute exposures. Changed the framing at the last minute. It is too early to put the radiant at the top right of the frame, the rest of the image would be down in the murk of the atmosphere. So I have gone for the radiant and Vega in the. Bottom left and the square of Hercules in the top right. Herself already saw one meteor as I was setting up, but nothing on camera yet.
  13. It looks like all of the cloud that was supposed to be overhead all day has decided to wait until nightfall to arrive... grrrr... no clear spots predicted until 7am...
  14. You are not filling me with confidence here Dave...
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