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Chriske
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Everything posted by Chriske
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m.tweedy...Is that C5 and C6..?(Avatar)
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Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
Drawing saw-patterns on plywood. Planning to make a light, yet strong inner framework. This is what it will look like. I printed rather thick rings to connect all wood disks with aluminium poles. -
I did a quick drawing, ok no holes, a spider for a 200 mm scope stl file was 389KB slicing that thing it was just 9.8Mb
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It's a simple concept, how do you manage to end up making that spider : 130Mb...??
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Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
The back-attributes mounted on a 600mm paper 'mould'. I took a snapshot of that back and printed it on a piece of paper so I can see where exactly all these lower parts should be mounted. All wiring and tubes will be added when all these parts are mounted onto the wooden surface. -
This is how it should be build to 'remove' all traces of diffraction. To be clear : these two circles are the primary and secondary mirror. I think the spider's scope above is very close, if not perfect.
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Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
I know...!😱 -
Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
1.2m high....????😳🤭 -
Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
Assembling the heaters again was the last thing to do, and they do work flawlessly again...😁 -
Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
Next step : making of the telescope-compartment Because I had no barrel of the correct size I had to use a couple of these. In the picture the already were cannibalised (two terras-heaters). Needless to say my lovely wife and my neighbours wife were not happy when they saw these two lying on the ground, taped together...🤭 Because of the smaller diameter it was very difficult to bend this 420mm 'telescope'. In an earlier life we used to make our telescope-tubes this way. They were very strong....anyway... This is the result : -
Good choice. Remember the sum of the angles of the curves must be 180° to 'rule out' diffraction. 'Rule out' is not correct I know, I should rather say the diffraction normally seen with a regular spider is evenly and completely 'smeared out' all over the field of view using curved spiders.
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Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
yet...🤭 -
Building/printing Hubble telescope scale 1:7 (finished!)
Chriske replied to Chriske's topic in DIY Astronomer
Started building HST's hull out of 4mm hardboard. First parts is the lower -instruments- part What I need : Sun and wind, hardboard, belts, 600mm diameter barrel, water(lots of it) -
My pal Michel is busy drawing all connections between the corridors and SaturnV. This is corridor'1' , Eight more to go. All these connection differ a bit.
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A few smaller corrections have been made and now LUT is added the hight of the complete project will be just over 4 meter.
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Thanks a lot Pete. I already ordered at Conrad. Apparently some of the readers here do have a VAT number
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I had another three in stock One that didn't work at all(left) and another Chinese copy. The third, also made in Taiwan, is now installed.
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Reply from RS-UK Thank you for your e-mail and your order. Unfortunately it is not possible for us to deliver to individuals without VAT number. We are a business to business supplier and therefore we cannot proceed your order.
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Well, same in UK, you need to fill in the name of company. So there's no way I can buy from RS in UK, same as in BE
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Stupid question I know Julian, but why would 'things' in general be made better in other countries then in RC..?
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As I said I'll buy these, But aren’t these also made in China...?
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I'll order in UK because only companies can buy from RS-BE
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Hey guys, How do I know this : It will depend on where in the frequency cycle the switching occurs.
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Meanwhile all parts except for the heatbed are replaced and re-connected.