I stumbled over some pictures of an mechanical iris... and I felt things. Things deep within me, that one does not speak of in polite company.
I must have mechanical irises! Loads of them. Scads of them. I want them bolted to anything where they might be remotely useful. Huge ones... let's not even go there. Although I do wonder if one is permitted to marry inanimate objects.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fwww.foresight.org%2FNanomedicine%2FImages%2FFig03_04.gif&hash=619cbbb3dec52a3a44a6fe0241ba588298f4023e)
(This is from a scientific article, which I'm leery of leeching from...)
This should let you know what I'm referring to, and some idea of how to build it.
Apparently, it's first one ring with pits in a concentric circle for holding pins, then shaped blades with pins at the very end for pivoting upon, and pins a bit further along the length for sliding upon slots. Next up is another ring, but with slots cut in a diagonal as paths for pins to slide upon. Apparently, it is upon the slotting ring that motive force is applied, so that the turning ring forces the blades closed or open.
I don't have anything to draw and post with but here's an idea I thought of while looking at your drawings:
1) Replace the retaining pins with small shafts with gears on them that are fixed to the "blades".
2) Put an outside "ring" gear that when rotated activates the inner gears and opens or closes the "blades" depending on direction of rotation.
It's hard to put into words but I'm not in a position to draw what I mean at the moment.
I'm with you in your love for mechanical iris diaphraghms. I've always loved how they look and move, but height of this interest peeked while watching A Series of Unfortunate Events. The character Aunt Josephine has this massive round window, and the shutters for it is a giant iris diaphraghm opperated by a chain and winch system. Sadly I could not find an apporpiate picture to share this wonder if you have not yet seen the movie(and if you havn't you should).
I must say that that diagram you have provided makes alot of sense. It seems a lot less complicated than I had ever thought that it would be. I'm sure it would still take a but to get it all to fit right and work smoothly, but the basic concept doesn't seem that hard. Thanks for sharing.
I would highly appreciate it if you could keep us posted on your progress. I'd be interested myself in fashioning them.
And then, as you say...larger models. Who needs doors, anyway?
Oh, I just love mechanical irises. For a door though, you'd probably need one that could close completely - I don't think the design in that figure can close completely. Here's a slightly different design (from this article (http://www.techbriefs.com/content/view/240/32/)) that can close completely. The figure only shows five petals, but you obviously need ten.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fwww.techbriefs.com%2Fimages%2Fstories%2Ftechbriefs%2F2005%2FGSC14550.jpg&hash=26d4b6eac66cbd328067935449e79975730e43a0)
I've been thinking for a while of making shutters for my study using an iris design - one of these days...
- Fzz
Quote from: Professor Fzz on May 02, 2007, 03:30:17 PM
Oh, I just love mechanical irises. For a door though, you'd probably need one that could close completely - I don't think the design in that figure can close completely. Here's a slightly different design (from this article (http://www.techbriefs.com/content/view/240/32/)) that can close completely. The figure only shows five petals, but you obviously need ten.
Much cleaner than what I was thinking of - thanks for posting the link and the image!
Although you could obviously cut outside teeth into the outer ring and run it using a motor so that's good too.
Quote from: Professor Fzz on May 02, 2007, 03:30:17 PM
I've been thinking for a while of making shutters for my study using an iris design - one of these days...
I'm of the contingent that would love doors like this in my home. Unfortunately I do not have such a large living area so as to accomodate them nor would the lady of the house be enamoured of said idea... :|
I believe it goes with out saying that if anyone had an abandoned missle silo for their abode, that they would make the effort to put iris doors in as many places as possible.
-O.A.
Quote from: Obadiah Askew on May 02, 2007, 04:26:39 PM
I believe it goes with out saying that if anyone had an abandoned missle silo for their abode, that they would make the effort to put iris doors in as many places as possible.
-O.A.
You know, I remember that abandoned missile silos DO GO ON SALE AS LIVING SPACES from time to time!
Quote from: heavyporker on May 02, 2007, 04:58:37 PM
Quote from: Obadiah Askew on May 02, 2007, 04:26:39 PM
I believe it goes with out saying that if anyone had an abandoned missle silo for their abode, that they would make the effort to put iris doors in as many places as possible.
-O.A.
You know, I remember that abandoned missile silos DO GO ON SALE AS LIVING SPACES from time to time!
*grumble* *grumble* They used to go for pennies on the dollar too. Now they're expensive unless you're used to California pricing. ;)
http://www.missilebases.com/
But yes I could easily see making those for all the doors, AND the silo "caps" as well.
Close the iris!
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv295%2Freverendz3n%2Fsilliness%2FStargateIrisAnimation.gif&hash=78d31be903803c70ee33434272be037d96f51ef0)
:p
I appologize... I don't know what came over me!
Never mind all that, what i want to make is a musical box like the start of Trumpton!... I like those iris thingys too.
Quote from: heavyporker on May 02, 2007, 12:09:39 PM
I stumbled over some pictures of an mechanical iris... and I felt things. Things deep within me, that one does not speak of in polite company.
I must have mechanical irises! Loads of them. Scads of them. I want them bolted to anything where they might be remotely useful. Huge ones... let's not even go there. Although I do wonder if one is permitted to marry inanimate objects.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fwww.foresight.org%2FNanomedicine%2FImages%2FFig03_04.gif&hash=619cbbb3dec52a3a44a6fe0241ba588298f4023e)
(This is from a scientific article, which I'm leery of leeching from...)
This should let you know what I'm referring to, and some idea of how to build it.
Apparently, it's first one ring with pits in a concentric circle for holding pins, then shaped blades with pins at the very end for pivoting upon, and pins a bit further along the length for sliding upon slots. Next up is another ring, but with slots cut in a diagonal as paths for pins to slide upon. Apparently, it is upon the slotting ring that motive force is applied, so that the turning ring forces the blades closed or open.
Yup, I've got one from an old SLR in front of me right now and that is indeed exactly how it works! There are probably several different designs, but this seems like the simplest. It does close completely too, in the same manner as the Stargate one shown above. They are exceptionally flash, and I guarantee you'll be seeing one on something of mine some day (sort of) soon ;) I can post some pics and details of the one I have if you need it.
Do please, Mr. Trades. Any and all information is extremely valuable.
If it isn't for a camera, it can be made of polished spring brass sheet. Shiny! Was always faintly dissapointed in the matte black appearance needed by camera innards.
A.
Quote from: Jake of All Trades on May 02, 2007, 08:14:44 PM
Yup, I've got one from an old SLR in front of me right now and that is indeed exactly how it works! There are probably several different designs, but this seems like the simplest. It does close completely too, in the same manner as the Stargate one shown above.
OK, there's nothing like a quick experiment to see what the constraints on the problem are. Beyold, the quick and dirty (actually quite smelly) beercan iris:
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fhandley.org.uk%2Fimages%2Firis%2Flores%2FIMG_2405.jpg&hash=f90c4c8b78be2b48b98c366be6fd7b534a5f8f9c)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fhandley.org.uk%2Fimages%2Firis%2Flores%2FIMG_2407.jpg&hash=a4ed96cb71f76d79f453827f978b317b7a8682a8)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fhandley.org.uk%2Fimages%2Firis%2Flores%2FIMG_2408.jpg&hash=13655bf433906681b83b59820aa67202ea21c45c)
The rest of the pictures are here (http://handley.org.uk/images/iris/). I just cut the pieces by eye from an old beer can, so they're fairly thin aluminium sheet. I didn't optimize the shape in any way and, for this purpose, I didn't need to deal with a fancy closing mechanism - fingers work fine.
Conclusions:
1. Jake, you're completely correct - it does close completely. Or as near as makes no difference.
2. Whatever you make the petals out of, it had better be flexible. The petals have a noticeable S-shaped bend when the iris is fully closed and the upper cover is on. If they were more rigid it would not close completely.
3. My iris would have a problem opening up again - the pivot pins (read "wire brads") stick up just enough that the petals catch on them as they open. Perhaps the petals should have been wider at the outside end, so they didn't clear the pivot pin of the next petal when fully closed?
Anyway, hope that helps you. Certainly helped me understand the problem a bit better.
I have an iris too. (https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fimg464.imageshack.us%2Fimg464%2F2131%2Fpicture076kk2.th.jpg&hash=14dbbdbb02f9b971cb9c07131475d5125df89c5e) (http://img464.imageshack.us/my.php?image=picture076kk2.jpg)
You have just motivated me to make a large plywood iris, thanks.
Ah... I just remembered where I saw an iris diaphram used as a door. Trevor's secret underground library, in the Aeon Flux movie, is reached by an iris diaphragm built into the floor, and has another iris diaphragm hiding its emergency exit. They appear to be made out of polished hardwood. Very pretty. The leaf shape isn't exactly like a camera iris though: there are fewer leaves, perhaps five, and they don't overlap as much, so the opening doesn't have a smooth profile in its half-open state, but rather more of a star.
A.
Wasn't an iris door part of the Get Smart opening sequence? It's been parodied so many times I can't recall which was "real"...
Unfortunatly, having an Iris Door does kind of make it harder for disabled peoples to access your home. Unless of course, they had some kind of spider walker.
Quote from: Lilithgow on May 02, 2007, 11:06:51 PM
Unfortunatly, having an Iris Door does kind of make it harder for disabled peoples to access your home. Unless of course, they had some kind of spider walker.
I'm fairly sure that it wouldn't be that much difficulty to get a ramp going up to the edge of the acuating ring, and give the bottem of the both rings a flat section, and then have a ramp going down the back side. Or else just have the bottem third of the whole iris sunk into the floor so you don't quite see the full circle, more of just a horseshoe.
Quote from: Darksmith on May 02, 2007, 11:31:58 PM
Or else just have the bottem third of the whole iris sunk into the floor so you don't quite see the full circle, more of just a horseshoe.
Exactly what I was thinking. I think that would look cooler anyway...
I suppose. When the maker closes a door, he opens a horseshoe...
Quote from: Lilithgow on May 03, 2007, 02:02:15 AM
I suppose. When the maker closes a door, he opens a horseshoe...
"Come, gentlemen, step through THE OMEGA!!!"
:) the Dreaded Return of Naqada-Punk :)
I love it :)
Quote from: Lilithgow on May 02, 2007, 11:06:51 PM
Unfortunatly, having an Iris Door does kind of make it harder for disabled peoples to access your home. Unless of course, they had some kind of spider walker.
Depending upon what kind of success the Mondo Spider has, we may very well see the mobile-ly challenged gents and ladies out there using a modification of such spider contraptions. Granted you'd have to add an analytically engine of somesort to be able to handle stairs and other modes of vertical travel.
-O.A.
Not that I can think of any particular purpose for this, but I wonder how hard it would be to make an elliptical iris, rather then a circular one?
Mike Scanlon
I don't think that an eliptical one would work all that well just because when you turn the actuating ring it seems like it would put too much tention of both rings, and also the all the pins. Maybe if the actuating ring was flexible some how so it would follow the path of the base plate, it would be able to rotate enough to open the blades.
Granted this is all just based on my thinking about this in my head, and I could very well be wrong. I'm definatly intreuged by the thought of an eliptical ring though.
Quote from: Darksmith on May 03, 2007, 04:04:08 AM
I don't think that an eliptical one would work all that well just because when you turn the actuating ring it seems like it would put too much tention of both rings, and also the all the pins. Maybe if the actuating ring was flexible some how so it would follow the path of the base plate, it would be able to rotate enough to open the blades.
Granted this is all just based on my thinking about this in my head, and I could very well be wrong. I'm definatly intreuged by the thought of an eliptical ring though.
Perhaps some sort of bicycle chain? i imagine that you could have gears at the top and bottom, ans use one or both to drive the chain. as to how exactly to provide power to said gears, I am not sure, but I am sure that someone, and likely several people on the forum could figure out a multitude of ways to make an elliptical iris work.
More pressing though, would be the shape of the fins/blades/fingers themselves. I imagine if we were to look to the various other iris shapes of other animals in nature, such as snakes or house cats with slitted irises.
-O.A.
I think the most stylish expression of an iris would be as a secondary blast-shield on a set of suitably steampunk goggles.
It would look rather dashing, don't you think? o_Q
Quote from: Alastair Smythe on May 03, 2007, 08:24:26 AM
I think the most stylish expression of an iris would be as a secondary blast-shield on a set of suitably steampunk goggles.
It would look rather dashing, don't you think? o_Q
Indeed Mr Smythe, it would be rather flash and bang to have a set of irises for when blackout conditions are required. Such as when trying to take a nap in a busy welding shoppe, although such is not recommended for anyone and said work shoppe would be much too noisy as well for most people to be able to sleep.
-O.A.
I think I know exactly how to make an iris work on goggles. The turning ring could have an knurled edge so it would be easy to use fingers to turn the ring and open/close the iris. The goggle tubes could have pinholes drilled in, removing the need for another ring to hold the pins in place.
Wouldn't you need 'slots' for the sliding pins? Also, I think the main problem would be how you'd need lots of thin 'blades' in the iris, to hide it in the frame of the lens.
Perhaps a pair of tinted or polarized glass irises would look rather dapper? One could use a layered iris and use tinted, 3d, or other sorts of lenses- even magnifiers to make a stellar set of optic-aids 8)
You know, all this talk about mechanical irisisisis (iri?), i want to see a ELECTRICAL IRIS!
Quote from: Baron Verndorf on May 03, 2007, 11:37:47 PM
You know, all this talk about mechanical irisisisis (iri?), i want to see a ELECTRICAL IRIS!
Firstly, it's irises. Secondly, electrical iris?! Are you referring to an electrically-actuated iris? Then you would still need the mechanical iris to attach an electrical motor to.
bonsoir,
you can find a good example (?) of a nice use of diaphragms at this address:
http://www.imarabe.org/perm/ima/diaphragmes.html
it's used like "moucharabié" (?) there is a automatic command closing more or less with the light
all the wall use these diaphragms: a must see at Paris!
(some other pictures if you tape " institut du monde arabe" and after ask for pictures, on google)
Quote from: heavyporker on May 04, 2007, 03:43:58 AM
Quote from: Baron Verndorf on May 03, 2007, 11:37:47 PM
You know, all this talk about mechanical irisisisis (iri?), i want to see a ELECTRICAL IRIS!
Firstly, it's irises. Secondly, electrical iris?! Are you referring to an electrically-actuated iris? Then you would still need the mechanical iris to attach an electrical motor to.
That was rather my joking point, 'mechanical iris' just seemed a bit redundant to me, but i didn't think it warented serius consern, so i made my jest, sorry, sometimes such things are difficult to convay through text like this.
For those who are both interested in incorporating irises (or irides) into various projects and flush with excessive quantities of cash money will find Edmund Optics (http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productID=1461) to be possessed of a diverse catalogue of precision made units. Their largest has a maximum aperture diameter of nearly 9 inches. I am acquiring a pair of 42mm irises (max. aperture 25mm) to add as shutters on a set of brass goggles.
-Q
I am still yet to construct my own goggles... :'(
For those more inclined to purchase parts and combine--the diaphragms from microscopes are quite excellent for many purposes. On USA ebay they range from 16-32 USD (search "iris diaphragm"). I am sure that with a bit of searching, you might could even find cheap used microscopes to dissassemble them from. Just thought i would through this out here.
Link to ebay search:
ebay (http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&catref=C6&from=R10&satitle=iris+diaphragm&sacat=-1%26catref%3DC6&sargn=-1%26saslc%3D2&sadis=200&fpos=ZIP%2FPostal&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=3%26fsoo%3D1&coaction=compare&copagenum=1&coentrypage=search&fgtp=)
The thought just popped into my head that an iris would make a great cover for a peephole on a door.
Someone comes knocking, the iris springs open with a great *shiunk* type noise to expose an eye staring out at the caller. The door swings slowly open.
I couldn't help but post this other concept of irises. It seems to be much easier to build, i am even thinking about making a window for my room...
http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artfeb07/pj-iris.html (http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artfeb07/pj-iris.html)
Darksmith, the only way that concept could be better is thus.
They approach, and ring your bell, sending a bellowing through the whole house.
Your tiny iris opens with a slightly-to-loud "SHUNK", and an eye examines you.
The iris closes.
The entire door, one huge iris opens.
OK, i did it. Heres the Flickr set:
http://www.flickr.com/photos/8393036@N07/sets/72157600236020826/ (http://www.flickr.com/photos/8393036@N07/sets/72157600236020826/)
and the movie of the movement:
http://www.youtube.com/watch?v=-uSHek0gdRM (http://www.youtube.com/watch?v=-uSHek0gdRM)
I know it's not exactly good (i made some miscalculations...) but it think it works as a first prototype. I am now going to try diferent configurations, and see how can i get a bigger maximum aperture.
I'd apreciate any feedback on that, and would gladly help with whatever experience i got with this.
Quote from: Qwertz on May 05, 2007, 06:56:58 PM
For those who are both interested in incorporating irises (or irides) into various projects and flush with excessive quantities of cash money will find Edmund Optics (http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productID=1461) to be possessed of a diverse catalogue of precision made units. Their largest has a maximum aperture diameter of nearly 9 inches.
Call it an 'iris diaphragm valve' and you'll find bigger ones, as much as 18" across and strong enough to bear weight or make an effective werewolf-proof window-shutter. I've no idea what they cost, though, they're the sort of thing one buys when building a granery or some sort of factory that dumps powders or pellets around.
Iris diaphragms on goggles lead me to imagine a steam version of Zaphod Beeblebrox's peril-sensitive sunglasses.
Bonsoir,
Here's a link to a similar discussion on instructables.com
http://www.instructables.com/community/How-to-make-an-iris-diaphragm/ (http://www.instructables.com/community/How-to-make-an-iris-diaphragm/)
Hope that helps!
Quote from: pingoart on May 21, 2007, 12:33:18 AM
OK, i did it. Heres the Flickr set:
http://www.flickr.com/photos/8393036@N07/sets/72157600236020826/ (http://www.flickr.com/photos/8393036@N07/sets/72157600236020826/)
and the movie of the movement:
http://www.youtube.com/watch?v=-uSHek0gdRM (http://www.youtube.com/watch?v=-uSHek0gdRM)
I know it's not exactly good (i made some miscalculations...) but it think it works as a first prototype. I am now going to try diferent configurations, and see how can i get a bigger maximum aperture.
I'd apreciate any feedback on that, and would gladly help with whatever experience i got with this.
Your video is set to private.
Now I need one. A huge one. Time to buy sheet steel.
I just had the idea of using a circular cat door as a frame and putting the iris inside of it for a "peephole" in the front door... Think the wife will let me?
just a passing thought on the beer can iris....
if you were to make a second pin hole to the rear corner of the metal, the corner furthest from the center when its closed, and link each hole to the next iris along with a connecting shaft, you could move all the leaves at the same time by moving one.
do I make sense? it's pretty late here.
on the subject of irisis onb goggles i was wondering if you fine fellowes (and ladies) could offer some advise on the construction of my gogles.
i want to have an iris over the left eye and a jewlers loup hinged above the right whith some sort or mechanicical doo-dad that would close the iris as the luop was lowered, any ideas f it could work and if so, how?
If you manage to connect the loupe to the external (adjusting) ring of the iris, it could work, but the only way I can imagine would be a bulky pulley system. Better to adjust it manually.
I made a pair of goggles with an iris in the right eyepeice with a camera's apature iris. It's construction was the same as mentioned above, just smaller.
Lens
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi2.photobucket.com%2Falbums%2Fy7%2Fviperwarp%2FProjects%2FDSC00163.jpg&hash=31ab365ef97a4655d8747cc694a7407d8c5392ba)
You can see the arm and spring that controls the iris down the bottom
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi2.photobucket.com%2Falbums%2Fy7%2Fviperwarp%2FProjects%2FDSC00220.jpg&hash=e01384d0bcae8119caf21e740a993d91df0ffd62)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi2.photobucket.com%2Falbums%2Fy7%2Fviperwarp%2FProjects%2FIMG_0038.jpg&hash=b30aaecded806a9202cd962a40368830fc531b04)
Tremendous!
I do like the idea of variations on irises, such as animal eyes. I am working on a simplified version of this earlier one I made. Using only two shutters instead of the twelve, Im hoping it will look like an almond eye
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleclosed.jpg&hash=e9be8c2b5ed51ed5eccf0a024588975b8f6911ae)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fs223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleopen.jpg&hash=e7574334580bed0f81e87d4a30f7ebfa3eeb36c0)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleexploded.jpg&hash=21fddf2c31d2e1a40da58e6cd5928387a66ec1a5)
Another simple variation could be this 4 door design I did as a mockup. Plan to make a bigger version eventually.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Firisopen.jpg&hash=c78e04484c371a924334ff1f92d93cd714e04804)
Quote from: Robo Von Bismark on February 26, 2009, 11:20:08 AM
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleexploded.jpg&hash=21fddf2c31d2e1a40da58e6cd5928387a66ec1a5)
Mr Bismark, would you happen to have any further information on the assembly of that iris? It's just the kind I was looking for ;D
there was a link posted in this topic but their prices are quite high, and they dont look that steamy, you'd probably be better off comisining one of the forum members to make one for you
Quote from: JingleJoe on February 26, 2009, 12:27:38 PM
Mr Bismark, would you happen to have any further information on the assembly of that iris? It's just the kind I was looking for ;D
I really need to scale down those pictures. Sorry about that folks
JingleJoe most of the info is here:
http://brassgoggles.co.uk/bg-forum/index.php?PHPSESSID=4ec7d5220eb53a13750e0f9050ca5257&topic=5079.15 (http://brassgoggles.co.uk/bg-forum/index.php?PHPSESSID=4ec7d5220eb53a13750e0f9050ca5257&topic=5079.15)
If you need the original template file I created I can email it to you. Its EPS vector format, so its easily scalable in Illustrator, Coreldraw or AutoCAD.
The most important thing to get right is the shutters. I cut them from steel and brass shim (about 0.35" i think). The studs were made from nails that i hammered through the shim. This ensued a tight fit and a bit of support along the nail shaft. I then cut the nails at both ends, leaving about 5mm sitting in the hole. The 5mm nail was the pushed flush against shim face and a blob of epoxy putty smeared over the surface to secure it. This has to be smooth to ensure that the shutter works well. Also helps if you sharpen the edges of the shutters for a smooth action (a dremel tool is good for this).
When I do my simple two shutter "eye" version I hope to explain this better with pictures.
is there a specific ratio for the size of the blades in relation to the size or the rings?
Quote from: stockton_joans on March 13, 2009, 05:14:03 PM
is there a specific ratio for the size of the blades in relation to the size or the rings?
Was this a question to me? Depending on style the ring is usually one third the thickness of the iris. I have tried to find a design with a thinner ring.
it was an open question to the board.
is that one third of the entire thing, as in the outer third being the ring and the inner two thirds being the iris or is it one third of the size of the iris itself?
i hope that makes sense to people who aren't me
Quote from: stockton_joans on March 17, 2009, 01:26:14 PM
it was an open question to the board.
is that one third of the entire thing, as in the outer third being the ring and the inner two thirds being the iris or is it one third of the size of the iris itself?
i hope that makes sense to people who aren't me
Its one third of the entire thing.
woo-hoo, the rambalings in my head meat made sense, also how wide do the blades need to be in relation to the opening etc?
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2FMechIris.jpg&hash=01fe263677e4d9891d799fba7291bc7affd9491d)
This is the diagram i used for my twelve blade monoggle. It was traced from photos from the internet.
i take it on the cam wheel the lines are grooves in the ring
Hola, I have been scouring the aethernet for aeons, and have found this: http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470 (http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470). I hope you can all make heads and tails of it, for I have managed to take only a little from it. But it does seem very good.
Quote from: Prof. Ichabod on March 26, 2009, 06:27:56 AM
Hola, I have been scouring the aethernet for aeons, and have found this: http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470 (http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470). I hope you can all make heads and tails of it, for I have managed to take only a little from it. But it does seem very good.
dosent look like it would work to me. the slots on the cam plates are equidistent from the point of rotation, so it actually wouldnt be able to turn at all, and the iris blades would be free moving and not actuated by the cam plate. if you were to offset the cam plate slightly, and reduce the distance between the rotation point and the point of contact with the cam plate, you could make it workable.
While Googling "brass 'iris diaphragm'" I found these exquisite brass camera lenses (http://www.boxcameras.com/2brasslenses.html). Not a helpful link, but nice eye candy. :)
Quote from: nathe on March 26, 2009, 09:16:59 AM
Quote from: Prof. Ichabod on March 26, 2009, 06:27:56 AM
Hola, I have been scouring the aethernet for aeons, and have found this: http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470 (http://yioryeosa.deviantart.com/art/Mechanical-Iris-43247470). I hope you can all make heads and tails of it, for I have managed to take only a little from it. But it does seem very good.
dosent look like it would work to me. the slots on the cam plates are equidistent from the point of rotation, so it actually wouldnt be able to turn at all, and the iris blades would be free moving and not actuated by the cam plate. if you were to offset the cam plate slightly, and reduce the distance between the rotation point and the point of contact with the cam plate, you could make it workable.
I agree it wouldn't work. With the curved track shown, you could move the blades without turning the cam plate. Indeed the text accompanying the picture says:
"The Actuating Ring; is the part that is moved to open and close the iris. It has an elongated opening that functions as a guide rail to move the blades. NOTE!!!; I'm not sure if these openings should be straight or curved. But i've drawn both of them just for good mesure."Then he follows up with:
"After some more contemplation on the subject of the shape of the rail in the actuation ring i think that the best shape is a straight line between the inner and outer position of the sliding axel.
The longer the sliding rail the longer it will take to close but also it will be more powerfull in its motion."In fact you probably want it straight, but slanted the opposite way from the way shown.
yeah, as far as i can see, strait slots in the cam plates, running radially is the best design. slots slanted toward the pivot will cause a faster movement, however slots can only be slanted
towards the pivot to the point that the mid-point of the slot is at a normal to the centre of the pivot, any more and it will lock up. slots slanted away will cause a slower movement.
Quote
"After some more contemplation on the subject of the shape of the rail in the actuation ring i think that the best shape is a straight line between the inner and outer position of the sliding axel."
this is actually the limit that you can get to. it will be very unstable and prone to locking up with this configuration. a less of a slant however will be workable
curved slots* would give you a variable speed, i have no idea what you would use that for.
*this would only work where the centrepoint of the curve is
not on the same curcumfrence as pivot. any more or less then concentric would change the direction you have to move the cam
***btw. it looks to me that the slots are concentric with the pivots, i am working off this assumption
Quotecurved slots* would give you a variable speed, i have no idea what you would use that for.
When used for photographic purposes, the variable rate allows you to have your f-stops on the control ring marked equidistantly, while the curves accommodate the change in rate required to get the actual aperture to the correct diameter (not a linear progression)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fupload.wikimedia.org%2Fmath%2Fa%2Fd%2Fc%2Fadcd8400b9cff8f5ae4ff1cac2074b07.png&hash=760d118e8228cc7c644b2f9e0a3448f166c55d48)
I've just had the most spectacular of ideas and I need a piece of information...
Is there a design of mechanical iris in which the blades do not overlap at all? i.e. where each edge of each blade is in contact with the two adjacent edges of the adjacent blades. And if so, where may I find the requisite proportions? It needn't close completely, just mostly.
I want an iris so bad.....It can be for anything,goggles,a gatling gun,a door,a car.....
Quote from: Derranged-Gadgeteer on May 19, 2009, 04:43:39 AM
I've just had the most spectacular of ideas and I need a piece of information...
Is there a design of mechanical iris in which the blades do not overlap at all? i.e. where each edge of each blade is in contact with the two adjacent edges of the adjacent blades. And if so, where may I find the requisite proportions? It needn't close completely, just mostly.
Do you mean like this?
http://brassgoggles.co.uk/forum/index.php?topic=15364.0 (http://brassgoggles.co.uk/forum/index.php?topic=15364.0)
Absolutely perfect my good sir!! I thank you profusely!
No problem. What are you intending to make?
A lid for my forge.
I plan to use metal parts to make plaster molds, from which I will slip cast the requisite parts in refractory. I'll have them fired when I get back to school. (We've got a/the world leading ceramics college) and I'll be sure to post videos and pics when finished.
Quote from: Derranged-Gadgeteer on May 25, 2009, 07:36:30 PM
A lid for my forge.
I plan to use metal parts to make plaster molds, from which I will slip cast the requisite parts in refractory. I'll have them fired when I get back to school. (We've got a/the world leading ceramics college) and I'll be sure to post videos and pics when finished.
Please post the pics when finished, that sounds amazing. If you need the original CAD files just email me.
Mayhaps one could use the iris in a way, as to actuate the flow of lightening through the end of a blaster?
Or to concentrate the fire of a Wide-Beam blaster
Quote from: Darksmith on May 06, 2007, 05:04:20 PM
The thought just popped into my head that an iris would make a great cover for a peephole on a door.
Someone comes knocking, the iris springs open with a great *shiunk* type noise to expose an eye staring out at the caller. The door swings slowly open.
:D I chuckled as I noticed this as I was looking for how to build an iris, because that's exactly what they did on
Prototype This!You can kind of see it here (http://dsc.discovery.com/tv/prototype-this/invention-central/invention-central.html), located in the "Lair," but you can't see it in action. I know there's a video of it working somewhere, but I haven't been able to find it yet.
Quote from: Robo Von Bismark on February 27, 2009, 05:44:16 PM
Quote from: JingleJoe on February 26, 2009, 12:27:38 PM
Mr Bismark, would you happen to have any further information on the assembly of that iris? It's just the kind I was looking for ;D
I really need to scale down those pictures. Sorry about that folks
JingleJoe most of the info is here:
http://brassgoggles.co.uk/bg-forum/index.php?PHPSESSID=4ec7d5220eb53a13750e0f9050ca5257&topic=5079.15 (http://brassgoggles.co.uk/bg-forum/index.php?PHPSESSID=4ec7d5220eb53a13750e0f9050ca5257&topic=5079.15)
If you need the original template file I created I can email it to you. Its EPS vector format, so its easily scalable in Illustrator, Coreldraw or AutoCAD.
The most important thing to get right is the shutters. I cut them from steel and brass shim (about 0.35" i think). The studs were made from nails that i hammered through the shim. This ensued a tight fit and a bit of support along the nail shaft. I then cut the nails at both ends, leaving about 5mm sitting in the hole. The 5mm nail was the pushed flush against shim face and a blob of epoxy putty smeared over the surface to secure it. This has to be smooth to ensure that the shutter works well. Also helps if you sharpen the edges of the shutters for a smooth action (a dremel tool is good for this).
When I do my simple two shutter "eye" version I hope to explain this better with pictures.
Dear Mr Bismark,
i LOVE your iris!!! i've been looking to make one for ages!!!
would it be possible for you to email me the template file as i can attempt to make an iris as good as your please?
Thanks
L
Quote from: Project13 on August 06, 2009, 10:29:53 AM
Dear Mr Bismark,
i LOVE your iris!!! i've been looking to make one for ages!!!
would it be possible for you to email me the template file as i can attempt to make an iris as good as your please?
Thanks
L
I was going to send you a PM but there doesn't seem to be anywhere you can attach a file. I also tried to upload the files to Photobucket and provide a link, but it only takes image files (not vector art).
Send me an email address and I will send the files directly to you.
Quote from: Robo Von Bismark on August 06, 2009, 12:09:36 PM
Quote from: Project13 on August 06, 2009, 10:29:53 AM
Dear Mr Bismark,
i LOVE your iris!!! i've been looking to make one for ages!!!
would it be possible for you to email me the template file as i can attempt to make an iris as good as your please?
Thanks
L
I was going to send you a PM but there doesn't seem to be anywhere you can attach a file. I also tried to upload the files to Photobucket and provide a link, but it only takes image files (not vector art).
Send me an email address and I will send the files directly to you.
no worries thanks ever so much
email is louie0075@gmail.com
:) thanks ever so much!!!! i'll let you know how i get on
L
uhuhu, after i reinvent the wheel I find this thread with google ::)
my 2 cents design in corel draw: http://www.steampunkworkshop.ro/images/iris.jpg (http://www.steampunkworkshop.ro/images/iris.jpg) I need an iris with an aperture of 100mm so yesterday I design my own but mabye some one else need it too.
also in pdf format, its al curves so can be inported in any vector program
http://www.steampunkworkshop.ro/images/iris.pdf (http://www.steampunkworkshop.ro/images/iris.pdf)
Nice. But haven't you got the slots on the outer ring angled the wrong way?
dont know, I never design one before and I suck at searching plans on internet, but I think your right, because I was thinking the cover goes like this
http://img204.imageshack.us/img204/7919/iris2n.jpg (http://img204.imageshack.us/img204/7919/iris2n.jpg)
but I see your point because my outer ring is in the same position,I rotate the cover not the ring ;D
Edited: you are right, I will modify soon
Edited again: I fix it, thanks for help
http://www.steampunkworkshop.ro/images/iris.jpg (http://www.steampunkworkshop.ro/images/iris.jpg)
http://www.steampunkworkshop.ro/images/iris.pdf (http://www.steampunkworkshop.ro/images/iris.pdf)
Quote from: Spiritus on September 22, 2010, 10:01:54 AM
uhuhu, after i reinvent the wheel I find this thread with google ::)
my 2 cents design in corel draw: http://www.steampunkworkshop.ro/images/iris.jpg (http://www.steampunkworkshop.ro/images/iris.jpg) I need an iris with an aperture of 100mm so yesterday I design my own but mabye some one else need it too.
also in pdf format, its al curves so can be inported in any vector program
http://www.steampunkworkshop.ro/images/iris.pdf (http://www.steampunkworkshop.ro/images/iris.pdf)
That looks like a 20 blade design I saw on the web.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade.jpg&hash=16ab1eb2dfd5519341e9e8246f3c2b85fa133723)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade1.jpg&hash=f2d56770eec8d11f2cdb0dd7c925c3e4bd472246)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade2.jpg&hash=2d50e78feade377f2c78e2f33d68da72f92624d0)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade3.jpg&hash=41be90a50eb87e33686fb6d4a7c77dbe87715bb1)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade4.jpg&hash=4216928f67377cc191eb53bc337c25d82e37af74)
Movement is similar to the "Stargate" iris:
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2FStargateIrisAnimation.gif&hash=5c570bc5927406e4362df2414f1ccc7c4e19338d)
I drew up a basic CAD drawing but never made it
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20bladeCAD.jpg&hash=d3c07d5f070e4c585fcbef9659223738c60fba5c)
fantastic, can you email me the templates also?
Quote from: Robo Von Bismark on February 26, 2009, 11:20:08 AM
I do like the idea of variations on irises, such as animal eyes. I am working on a simplified version of this earlier one I made. Using only two shutters instead of the twelve, Im hoping it will look like an almond eye
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleclosed.jpg&hash=e9be8c2b5ed51ed5eccf0a024588975b8f6911ae)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fs223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleopen.jpg&hash=e7574334580bed0f81e87d4a30f7ebfa3eeb36c0)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2Fmonoggleexploded.jpg&hash=21fddf2c31d2e1a40da58e6cd5928387a66ec1a5)
Those materials are taken from a camera lens??
Here is a cad file I have had for a while, have fun
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FRIIwK.png&hash=9d70b66e1fb0d9a244e707a1c6f07cd5f98d194b)
http://www.mediafire.com/file/3ohhtxyied5n1ev/iris.zip (http://www.mediafire.com/file/3ohhtxyied5n1ev/iris.zip)
grr no edit button, anyway there are 2 different cad files with slightly different iris's in it
Robo Von Bismark,
Just wondering, what sort of tools and materials did you use to construct your iris? I'm looking to make a pair and just wanted to know what the... tool cost would be for such a thing.
Thanks,
Captain Morgan Arkwright.
Quote from: Robo Von Bismark on March 17, 2009, 03:00:04 PM
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2FMechIris.jpg&hash=01fe263677e4d9891d799fba7291bc7affd9491d)
This is the diagram i used for my twelve blade monoggle. It was traced from photos from the internet.
Robo Von Bismark and others,
After much searching on the net I found this thread and everything made sense. I used this image to build my own iris mock-up. However, I'm trying to make some changes in the dimensions. I was wondering if you have the vector/cad file for this and you don't mind sending it to me? my email is aboutthebirds [at] gmail.com.
Thanks in advance,
Al
Quote from: surfinbird on February 17, 2011, 07:56:16 AM
Robo Von Bismark and others,
After much searching on the net I found this thread and everything made sense. I used this image to build my own iris mock-up. However, I'm trying to make some changes in the dimensions. I was wondering if you have the vector/cad file for this and you don't mind sending it to me? my email is aboutthebirds [at] gmail.com.
Thanks in advance,
Al
look up 3 post :)
Quote from: mudslag on February 17, 2011, 08:16:24 AM
Quote from: surfinbird on February 17, 2011, 07:56:16 AM
Robo Von Bismark and others,
After much searching on the net I found this thread and everything made sense. I used this image to build my own iris mock-up. However, I'm trying to make some changes in the dimensions. I was wondering if you have the vector/cad file for this and you don't mind sending it to me? my email is aboutthebirds [at] gmail.com.
Thanks in advance,
Al
look up 3 post :)
Thanks for the reply. Actually I was looking for the vector version of what Robo had posted (post 64 I believe). I have built that with paper and it works well, I just need to do some adjustments and don't want to screwup the location of the holes and curves by retracing the image. I've downloaded your cad files as well and will take a look at those as well. Thanks.
Regards,
Al
cool, thread, heres a video of one that i made before using an early design from the shopbot forums, but i think it would be fun to transfer it over to thinner acrylic and made it more like the 20 blade design you guys have photos of
Mechanical Iris - 1st version (http://www.youtube.com/watch?v=r0y_uNoYqWM&feature=email#normal)
just looked through all of this, its beautifull!!!
=)
If you can be satisfied with a three-leaf iris shutter, Cardnetics (http://cardnetics.com) offer the same as business and greeting cards. They may also be had as pre-scored, punch-out kits.
I'm not advertising for this firm, but suggesting a means to obtain a template from which one may construct card, polymer, or metal irises. One brass Sovereign to the steampunker who posts a usable pdf template!
This has to be one of the more impressive iris constructions I've seen considering it's simplicity.
http://brassgoggles.org/forum/index.php/topic,24887.0.html (http://brassgoggles.org/forum/index.php/topic,24887.0.html)
Quote from: Robo Von Bismark on September 22, 2010, 10:09:36 PM
Quote from: Spiritus on September 22, 2010, 10:01:54 AM
uhuhu, after i reinvent the wheel I find this thread with google ::)
my 2 cents design in corel draw: http://www.steampunkworkshop.ro/images/iris.jpg (http://www.steampunkworkshop.ro/images/iris.jpg) I need an iris with an aperture of 100mm so yesterday I design my own but mabye some one else need it too.
also in pdf format, its al curves so can be inported in any vector program
http://www.steampunkworkshop.ro/images/iris.pdf (http://www.steampunkworkshop.ro/images/iris.pdf)
That looks like a 20 blade design I saw on the web.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade.jpg&hash=16ab1eb2dfd5519341e9e8246f3c2b85fa133723)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade1.jpg&hash=f2d56770eec8d11f2cdb0dd7c925c3e4bd472246)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade2.jpg&hash=2d50e78feade377f2c78e2f33d68da72f92624d0)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade3.jpg&hash=41be90a50eb87e33686fb6d4a7c77dbe87715bb1)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20blade4.jpg&hash=4216928f67377cc191eb53bc337c25d82e37af74)
Movement is similar to the "Stargate" iris:
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2FStargateIrisAnimation.gif&hash=5c570bc5927406e4362df2414f1ccc7c4e19338d)
I drew up a basic CAD drawing but never made it
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi223.photobucket.com%2Falbums%2Fdd131%2Fmsgprinter%2F20bladeCAD.jpg&hash=d3c07d5f070e4c585fcbef9659223738c60fba5c)
You dont happen to have the design for the 24 bladed iris would you?
possibly in a pdf you could send?
I have designed a web-based tool for designing irises:
http://iris-calculator.mattarn.co.uk/ (http://iris-calculator.mattarn.co.uk/)
Hope it's of some use to you guys.
Holy thread necromancy! Lets revive this thread again to say "I made one of these things!"
The "naked" iris
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi61.tinypic.com%2F5xsrv9.jpg&hash=0c443e2d868dab6ef983aad632181671fb0c923d)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi57.tinypic.com%2Fe982kn.jpg&hash=3991f87bbc43c04c51dc674f01be42223783ed04)
And with the nicely polished cover:
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi60.tinypic.com%2F20zxts4.jpg&hash=e970a9018267a443c185df75237237e067ed4b9f)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fi58.tinypic.com%2F2j0y0yb.jpg&hash=1c4f350b489a7dd242b6f10f25cda347970268ef)
It works really well, quite pleased!
Is that all hand made Wirecase? Looks great!
Yep, handmade. It's sheet brass, a few pieces of 3 cm brass pipe and brass nails for the pivot points.
Very nice. Appropriate to bring the thread back from the dead.
Hello forum! Here's my attempt at a mechanical iris:
(https://lh6.googleusercontent.com/-_FLQF-dVIxQ/UzgnUQIv1bI/AAAAAAAAAJY/W_Qy1vk90Qs/w478-h849-no/Steam+Punking+Out+-+1) (https://lh3.googleusercontent.com/-kpHm7N-R4EY/Uzc6myfuKXI/AAAAAAAAAHs/WXgql2T2H4A/w958-h539-no/14+-+9)
9 leaves, all cut from .025 brass shim, brass rings cut from .5 sheet. Pins are brass tacks brazed onto the leaves with tin solder. Housing ring is the band from a mason jar lid. There is a small convex mirror mounted on the inside for effect. Actuator (cam ring) is a little rough looking, but the opening and closing action is pretty smooth.
(https://lh4.googleusercontent.com/-opkKn3YoSR8/Uzc6m7fijiI/AAAAAAAAAG8/IsQ53aPBNb0/w478-h849-no/14+-+4)
(https://lh3.googleusercontent.com/-3lch9WeThrw/Uzc6m7qFECI/AAAAAAAAAHI/G900Zqy2Yls/w478-h849-no/14+-+5)
I would love some advice on fabricating my next cam ring. This one is simply the lid from the mason jar with slots cut into it. The whole thing is a little jury rigged, but looked fine once I slapped on a brass backing plate. Wouldn't mind if the inside looked as pretty as the outside. Thanks in advance for any advice!
(https://lh3.googleusercontent.com/-m93Nc2UX7hU/UzgnUd4eU_I/AAAAAAAAAJ8/FTDeWAs5n2Q/w478-h849-no/Steam+Punking+Out+-+4)
https://plus.google.com/u/0/+AdamRast/posts (https://plus.google.com/u/0/+AdamRast/posts)
And, this, too, is a nice work!
I feel the roughness goes very well with the mirror.
The only tip I may have is to carefully file all your edges to make them into a smoother curved shape, but then that would ruin the roughness effect.
I'm starting to offer small-quantity, iris diaphragm manufacturing. If anyone needs any iris parts made for their projects, feel free to contact me: matt@iris-calculator.com
We're now selling a steampunk inspired iris diaphragm that fits your typical welding goggles: http://iris-calculator.com/steampunk-iris.php (http://iris-calculator.com/steampunk-iris.php)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Firis-calculator.com%2Fimages%2Fsteampunk-iris%2Fsteampunk-iris_01.jpg&hash=1cca05ec9152af410117edf3f641c4777a146f61)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Firis-calculator.com%2Fimages%2Fsteampunk-iris%2Fsteampunk-iris_02.jpg&hash=a49e17ab7048e9d1ea0eb2b71a17d229d97e1136)
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Firis-calculator.com%2Fimages%2Fsteampunk-iris%2Fsteampunk-iris_03.jpg&hash=2051e21ed4d66e67acbea6d56ac07f312fcb9b96)
As always, reach out if you have any mechanical iris design questions, or need something custom made.
Matt
I'm just wondering if anyone has actually tried to build this iris diaphragm from the NASA technical paper. If you read the paper, the idea is ingenious. There are five blades in front, and five blades behind, (there are, in fact, ten blades) and closure is complete, as is required for apertures in space. However, I've been trying to adapt this design to build in wood, and it is difficult to determine the source of the curves in the blades. Similarly, it is difficult to design, without these curves, an aperture that works, in wood. If anyone has similar drawings for this aperture that they were able to make work, I would be most appreciative. I'm attempting to design a ten bladed aperture, using a similar model of five blades behind and in front (to reduce friction) and my overall size is 24", or 609.6mm. I'm thinking that a practical sized full opening (maximum aperture) using this sliding ring mechanism would be about 14", or 355.6mm, to allow enough space for the blades to exit. The other advantage of this design that I like much better than many of the other sliding blade options is that very few degrees of turn are required on the actuating ring in order for complete opening or closure. The reduced friction by having less (or ideally no) overlap on the blades is also something I'd like to achieve.
I'm interested to hear others thoughts.
Cheers,
Lori
Quote from: Professor Fzz on May 02, 2007, 03:30:17 PM
Oh, I just love mechanical irises. For a door though, you'd probably need one that could close completely - I don't think the design in that figure can close completely. Here's a slightly different design (from this article (http://www.techbriefs.com/content/view/240/32/)) that can close completely. The figure only shows five petals, but you obviously need ten.
(https://brassgoggles.net/forum/proxy.php?request=http%3A%2F%2Fwww.techbriefs.com%2Fimages%2Fstories%2Ftechbriefs%2F2005%2FGSC14550.jpg&hash=26d4b6eac66cbd328067935449e79975730e43a0)
I've been thinking for a while of making shutters for my study using an iris design - one of these days...
- Fzz