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After what felt like a decade my Mesu e200 was finally delivered. It is such a beautiful piece of machinery, no frills just pure functionality.
I had the counter weights manufactured locally and completed the mechanical assembly, pretty straight forward. Thanks to @Jonk, https://stargazerslounge.com/profile/37161-jonk/ for providing me with the dimensions for a 16,5kg counterweight in stainless steel. I downloaded and installed SciTech.exe plus the other bits of software to make it work. The only thing I’m still uncertain about is Carte du Ciel. I’m used to Stallerium for my Skywatcher and Celestron PWI, which I love. I guess I’ll just have to get used to CDC.
I need some assistance and would appreciate help. My mount is not going to have the luxury of a permanent pier, I have to move it off the balcony every time I’ve finished my session. I have a very limited view of the South (I’m in South Africa) and no view of the SCP. Despite this I can polar align to a high degree of accuracy with the Synscan routine embedded in the SkyWatcher EQ6R Pro hand controller. Having had a cursory glance at the help menu in the SciTech Polar Alignment tab and it appears that I will need to have a view of the Celestial Pole. Does anyone have advice please?
In the famous words of Bilbao Baggins, I'm going on an adventure!
Almost 2 years ago i got rid of my old shed with the intention of replacing it with a R O R shed,
Well a lot has happened since then, but no R O R shed ? No way i could build one, my DIY skills are rubbish.
My mount and scope plus other bits have sat in the garage ever since, mainly because it's such a pain to drag everything out and set up only to be thwarted by cloud/rain, so i decided that they would stay in the garage until the arrival of R O R shed,
so fast forward 2 years.....
Well! while browsing some astro sites i happened across an advertisement which said something like wooden observatory for sale, 7ft x 7.5ft, buyer to dismantle and remove, so me being in need of one had a look at the pictures he posted, that will do nicely i thought, so i contacted the seller and asked for more info and pictures,
It's not a roof that rolls off onto supports, it turns out 1/2 of the roof rolls over the other 1/2 with a front section of the shed that drops down,
I was happy with what i received from the seller, he couldn't have been more helpful and seems a really nice bloke,
Right then, where are you located mate i asked,
Bovey Tracey he replied,
to be honest, i had never heard of it, so time to consult google maps..
Well it turns out it's only about 270 miles one way from my house in Lancashire ? (so round trip of approx 540 miles)
Time to make a decision, do the positives outweigh the negatives, is it going to be a cost effective solution in getting my R O R shed ?
after doing some calculations and a little more contact with the seller, the answer to the 2 questions above is YES ?
I have hired a box van for this coming Saturday,shangied my brother in law to accompany me and..
I'm going on an adventure to Bovey Tracy to dismantle it and give it a new home in sunny Lancashire,
even though my DIY skills are rubbish i feel i have to give this a go,
All in with the cost of The Obsey (as it is now known until i can think of something better) and with the hire van/fuel and brother in laws dinner
it's going to set me back approximately £570 and a day out, I'm well chuffed with that, the cheapest quote i had to have one built was £1000
I have a couple of pictures of the obsey in it's current location if anyone would like to see them,
Sorry to waffle on so long,
Thanks for reading
I've set my scope up on it's pier in my ROR observatory, done a few drift aligns and started to take some images.
I've noticed a 'quite' regular dip in my DEC line on several nights.
Would anyone be able to have a quick scan of my log and offer any insight?
Could it be backlash? Could it be something with each rotation of the gears? Faulty tooth?
It is quite regular, although not always, and always in the same direction.
It doesn't seem to be adversely affecting imaging yet, but I've not tried anything too taxing.
The performance of the Mesu200 is unquestionable excellent, and I'm very happy with the performance I get from mine with a 10" Quattro riding on top. It performs very well handling a pixelresolution of 0.94" (camera resolution not the RMS which is much better of course).
Planning for a future permanent setup under excellent seeing, I wonder if there are any users who has experience regarding the upper limit of the Mesu200 for photographic use.
It's tempting to try with a large newton astrograph, but wonder how it would handle a weight close to 60 kg and 0.5" pixel resolution. Common sense tells me to aim for less and not go beyond 40 Kg/1600 mm focal length.
Just starting my build and found advice of others really helpful. Appreciate views of others on my build before I get too far. I am building the Observatory for My HEQ5 with a short fast refractor for imaging and my LX90 SCT mainly for viewing, so my pier must allow me to easily swap scopes if necessary.
Design principles and interesting features:
Basic design: Concrete Plinth + Altair Steel Pier + Off-the Peg Shed
Pier: I chose the Altos pier because it looked sturdy and allowed some final leveling and North orientation after installation. It has a variety of fixing options and adapters, plus I might move and could take it with me. https://www.altairastro.com/altair-skyshed-8-observatory-pier.html
Shed: Went for a 10 x 6 shed. Intend to build just a 6x6 roof, which will slide over the other 4 foot bit + 2 foot more. The four foot section will be the warm room with a flat roof. I can build the internal partition after the shed is erected. Wanted a Shed that could be easily adapted and found the "Rowlinson Premier Shiplap Apex Shed 6X10" Price: £514.99 inc delivery This is good quality, but the real bonus is that the apex sections are separate. You build the four walls at level height and then the two apexes go on the ends. This will allow me to then easily adapt the design by attaching rails to the bottom box section and then wheels to the roof bit. The shed sides are also slightly taller than a standard shed at 172cms giving me some welcome headroom. The roof comes in sections, so building just the 6 foot bit looks straight forward (In theory). It is worth shopping around for sheds as the same model can be different prices on different sites.
Wheels and Rail: I think this bit is neat, I am using a wooden slotted fence posts as the rails. Wheels: B&Q TENTE FIXED CASTOR 45MM product code 3700001799978 price £2.14 each rated as 40kg each and I am using 8 of them for a 6 foot roof Rails: B&Q NEVA HALF WOODEN FENCE POST 70X35X1800MM product 3663602942825 £7 each and I am using two on each side for a total length of just under 12 foot. I looked at Aluminium rails but during a wander round B@Q I found these wood posts with grooves in them. I tried the wheels in store and it looks fine. Added advantage that they can also form part of my Obs structure.
Pier base: As per Altair instructions a very large hole in the ground filled with concrete. However my base is a plinth that protrudes 35cm above the base level. I calculated the height needed to elevate the pier so that my tallest mount (The LX90) would just fit under the closing roof. If I had mounted the pier at ground level I would have reduced my min elevation angle to 60 degrees for my shortest scope/mount combination. With the extra height I get down to 25 degrees, less if I raise the pier head. The pier also has a narrow central hole, so I have run a cable in a 12mm pipe through the concrete block and up through the middle of the pier.
Shed Base: Paving stones laid after the pier is installed. I will run a 40mm pipe under the slabs to carry all the other cables to the pier.
Today I completed the first stage and poured the concrete for the pier base and plinth as per the instructions on the altair web site. The concrete goes 80cm below the ground and 45cm above, with a 10cm base that leaves a 35cm plinth. I used a wooden former to contain the concrete above ground. I made it of 9mm ply with screws every few inches. On top I attached a template holding the fixing bolts which were pressed into the soft concrete. Even so the weight of the concrete nearly burst the mold and I had to reinforce with paving slabs. See picture, but it looks fine now. See pictures)
I should add that I employed a local garden handyman to dig the hole and pour the concrete.
The next stage is to lay the slabs for the base. Any comments most welcome, especially as they could save me from an imminent disaster, but so far so good.