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Dwarf Nova

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About Dwarf Nova

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    Variable observation.
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  1. I see, thanks. I shall attempt to solve the air-tightness puzzle.
  2. Thanks for reassuring advice. Perhaps it would help to insert flexible gaskets between fibreglass and metal of washers/spreaders to mitigate pressure points.
  3. Location: Orkney and exposed. Since I got the concrete base down for my 2.2m pulsar dome I have experienced some very strong winds (averaging 50mph and gusting 70mph) - and I believe it gets stronger. This has caused me to pause for thought (panic) before I assemble the dome. I would appreciate any advice on offer about how to ensure that the cupola is not ripped when the wind gets up. So far I have obtained a set of four M12 anchor-bolts and am fiddling with ways to shackle the cupola to the concrete base; and I would love to hear from anyone who has a feeling for how to get a strong connection to the fibreglass.
  4. Hi Gonzo I have just successfully breadboarded a weather station (the meteostation described on the indilib website) and am looking to build a housing. I have not, however, found enough detail in SGL about how one should mount the IR sensor, to ensure that it is rain-proofed. How have you managed this?
  5. Concurrently with the dome assembly, I am cobbling together the potential contents. Initially, I intend to install my HEQ5+250mm f/4.8 Newtonian on a tripod. Have tested mount operations successfully indoors with indilib on a RaspberryPi, remotely connected to KStars. I think indilib (http://www.indilib.org) is brilliant from many points of view. Also working remotely with RPi/indlib are: Xagyl filter wheel, Atik CCDs (314E, 460EX), DIY focuser drive, GPS module (USB connected). The electric focuser drive uses one of those ubiquitous steppers, controlled by an Arduino nano. This is bolted and belt-connected to a Crayford focuser. Works well but is an ugly piece of engineering :embarassed: . Think I'll try to make a better package. All of that is ready to go if I can just get the dome installed without neglecting too much the remaining work on the house :grin: . I also have some morale-raising works-in-progress:Have bread-boarded an indiduini meteostation; and am really pleased with the result. I have now to design a robust and rainproof container Have ordered the bits for an all-sky camera (RPi NOIR); following the helpful examples set by several SGL members. Have designed and prototyped automation for the dome. This integrates with KStars/INDI and comprises separate Arduino processors with DC motors for dome rotation and shutter control. The shutter-controller is wirelessly (RF24) linked to the indilib, dome driver. Pleasingly it all works on a test-bed. The challenge I now face is to mount it robustly and (fingers-crossed) aesthetically in the (as yet not assembled) dome. I feel I will be paying for the sheet-metal work. :rolleyes: Have designed a pier for my EQ8 mount. Again, to resist corrosion, this has to be of marine-grade (316) stainless-steel. While I intend to weld the thing together I feel it wise to have the bits laser-cut. I am however unsure about where I can get the material. This forum, in particular, has given me the inspiration and the nerve to attempt this project. I admire what people have done and am very grateful that they are willing, so generously, to share their experiences.
  6. Dwarf Nova

    A start

    With the platform down, I have been contemplating how to assemble the dome (Pulsar Observatories 2.2m), making sure that it is secured always against the wind; which can gust here at ~100mph. I have designed a stainless-steel bracket, several copies of which are to be bolted to the cupola. This will allow me to anchor the cupola to the concrete platform. I have bought marine-grade, stainless eye-bolts for this purpose. So I can source my brackets could some kind person please recommend a supplier of small metal orders who preferably will also laser-cut?
  7. Dwarf Nova

    Solar Eclipse 2015

    Solar Eclipse from Orkney with intermittent cloud. Taken though an an Orion ED80 with a DSLR.
  8. Thanks everyone for warm welcome. From what I have experienced so far, this forum is very active and enthusiastic. I hope my intro didn't sound like bragging. It's such as pleasure to come to these conditions after the bright sky near Milton Keynes and the street light in my old back lane.
  9. Hello Everyone. I am newly resident in the North and applying finishing touches to a refurbished house. The concrete is down for my dome (Pulsar 2.2m) and I will start dome assembly this week. The first lot of equipment to go in is: HEQ5 mount, Orion Optics Newtonian ( F=1200mm, f/4.8), Atik 314E , focuser, filter wheel. (this setup was in use at my old place) My preferred software setup is on Linux: KStars/INDI, with the INDI server on a RaspberryPi. I have already used this successfully with the HEQ5. When I clear the workshop enough to weld a pier together, I shall install : Orion Optics ODK12 ( F=2040mm, f/6), Atik 460EX, stuff, + dome autorotator I plan to build a fibre-fed grating spectrometer once this lot is in place. It is very windy here so the protection of dome is essential. Clear skies are at a premium, due to weather and long summer days, so I need a setup that is quickly ready for reliable use. The seeing here is stunning. The only serious light pollution is from an Aurora. I intend to do variable observation - have joined AAVSO. I have followed this forum for a good while and am very grateful for the advice and information I have gleaned from it.
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