Quote:How are you getting power in there?
I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
Quote:How big is the gap around the pier? It looks a little tight. -Rich
Quote:Dads love a project when visiting don't they! Its coming along nicely....
David M. Douglass - Tempe, Arizona - http://www.az-dahut.net/
Quote:Like Father -- Like Son !!
Now just how cool is that ??
You've got to love it.
Quote:I think that is the biggest GEM I've seen - or is your Dad really small??
Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
Dark Arts Observatory - Brockport, NY - Skyshed POD XL5 with iOptron iEQ45 Mount
Scopes: C8, C5, SV110 ED, EON-72 ED, ST 80, ATRC6, Megrez 90
Quote:One question - what holds the dome down to the rest of the building when not in use? I didn't see anything in your photos and Id be concerned that a big windstorm could pull it off.
Quote:While a dome does inherently shed wind load better than other type of roofs, if you have a serious wind storm, the dome can be lifted off the building quite forcefully. 20 mph with 40 mph gusts is just a windy day, not a wind storm.Those washers on the guides won't hold it. Especially since you mentioned you only have 4 of them. That means if it begins to lift, it will do so on one side first and only contact one of the washers at a time.
Quote:Right now, your dome's only defense against wind is it's shape and the fact that it takes a lot of wind to create the needed upward lift on a dome shape. But, once an edge starts to lift, even a little, the wind will get under that edge and the upward force will increase dramatically and almost instantly. Just my 2 cents, but I'd use some kind of clamping mechanism, maybe toggle clamps, to secure the dome to the rest of the building when you're not using it.
Quote:I gave up on encoders because of the noise issues, even with a quadrature encoder.
Quote:Interesting that the compass gave you problems. Isn't 3 degrees good enough?
Quote:For dome power I'd be tempted to look at using a battery with solar charging.
Quote:Looks great Jared - a fine job....I just use some long M10 bolts to hold my ROR obs roof down, just a hole through track and roof frame, bolt slips up and bolts the roof down.... I use 3 for day-to-day use, and have holes for a few more if a good low-pressure cell is on the way....
Docent at the Rose Center for Earth and Space at the American Museum of Natural History
Quote:I'd like more specifics about the digital compass and it's use to control dome positioning. Seems like a great idea!