you could use a web cam with face recognition so it would only let your dog in and not the neighbors cat
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you could use a web cam with face recognition so it would only let your dog in and not the neighbors cat
OK this is cool....
a 30" mechanical IRIS window on you tube.
http://www.youtube.com/watch?v=TuEqH...layer_embedded
after watching that, Michael, any chance you could get and post some accurate dimensions from those camera parts you have?
I need to finish this project first but then I definitely want to play with this other style of iris.
Chris,
I'm off to meet with a client on a new website in the morning but I will definitely get the parts drawn up sometime later on tomorrow (well, I guess it's already today!). I'll do them in Illustrator so we all have vectors to work with for our designs.
I like what is happening with this post. It will be interesting to see what everyone ends up with...
Mike
Chris - thanks for the post! That is a very clever and simple drive mechanisim. Russ
Michael Schnorr quite graciously broke out his micrometer and measured and drew up an old camera iris he had. As per his request I am posting the files for anyone interested.
http://www.schaie.com/shopbot/Michaels_Iris.zip
Thanks Mike!
Thank you, Chris, for starting this whole discussion! It's great to see everyone jumping in with ideas!
Mike
OK as famous as I am for starting something new before the last thing is finished...
I played around with Michael's drawings to make sure I wasn't missing a better design.
Here is a stab at a more traditional Camera IRIS.
Attachment 1076
Attachment 1077
Attachment 1078
Clearly I underestimated the thinness needed for the metal leaves. I used a sheet of .020 brass I had to cut some 4" d. leaves.
I got 6 of 12 in place before it started to jam at the center leaving an approx. 3/8" hole when closed.
Michael, could you throw a mic on your parts again just for giggles and get a thickness of the leaves? and what is the total diameter of the rings?
Chris
Chris,
That is the same problem I ran into with my plexiglas shade model. They can get away with being so thin in a lens as they basically support each other and are encased between glass so they can't get damaged.
The diameter of the rings is 2.085 and the leaf is approx. .002 thick (hard to tell for sure - at that size the Mic needle is thicker than the part so I used the edge of the needle).
Mike
Aren't the shutter pieces on a real camera frosted?
Errrrr...Orange peel?
Or ......Not mirror finished?
I believe this is a technique to reduce drag.
Chris...your brass may need to be blasted or roughed up?
Chuck,
In actual fact, a shutter leaf is smooth and matte finish but that finish is more a matter of reflection than friction. In order for the 12 pieces of metal to overlap and close for as small a hole as possible (the smallest hole being largest Fstop number of that lens, resulting in a slower shutter speed and more detail), they just need to be as thin as they can be and still function. Any surface texture would just make them thicker. Friction/drag has nothing to do with it...
Mike
This mich works great
http://www.harborfreight.com/cpi/cta...emnumber=66319
I'd like to thank Chris for starting this thread and sharing the prototype file. This was a fun project. Its being installed in a door for a peep hole (that was a cool idea). And, I'd like to share these files with all.
I redrew the iris making some small changes and after three attempts I finally finished the project. I used 1/4" Masonite (actually measures a little shy like 3/16") and 0.09" aluminum and used a 1/8" end mill for all the cuts. 1/4" x 3/8" shoulder bolts hold the large gear. The holes for the small gears were drilled, 1/8" and fitted with a short lengths of 5/32" brass as bushings which accepted 3mm screws for good fits. 3/16" holes were profiled with the 1/8" endmill on the large gear and the leaves where the arms attach and fitted with #6-32 tee nuts which protruded slightly through the Masonite. On the underside of the aluminum arms, I countersunk the holes just enough to fit snugly over the tee nuts and #6 -32 x 3/8" screws secured them. I attached a piece of clear acrylic to cover the hole. I used thread lock on all screws.
No matter what fasteners you use, as long as there is no slop, this should turn freely. This was a problem in my first two attempts. The large gear would move left or right instead of turning.
These might not have been the best choices of materials but, it worked fine. I think the next one I build will be entirely out of aluminum.
Hope you enjoy.
One of the things I like about the wood/masonite versions is that the iris completely closes. I doubt that it's possible to completely eliminate the center hole with overlapping metal leaves (though it can certainly get quite small).
For what it's worth, here is a different version of a professionally manufactured iris -- this one is intended for use in a stage lighting instrument.
Attachment 9237 Attachment 9238 Attachment 9239
NICE... Greg,
This project got "back burnered" due to a backlog of other work, but it has been itching at me the whole time.
I will definately incorporate the outside gear. Thanks for posting your files. I -have- to get at least one final piece made for the upcoming camp/s over here on the west coast.
I hear ya on the wood/masonite. I actually was thinking that the working parts on my final will be milled out of brass.
anyway yippee! I love seeing how others run with an Idea.
Thanks again for posting.
Greg,
Did you actually use the files posted to cut the parts for the unit shown assembled?? Thanks for posting by the way, but there seems to be a problem with the size of the large gear component as the diameter appears to be too small. The radial slots seem to have a smaller bolt circle diameter than the shoulder bolt holes in the base.
Can you check before I resize and screw something up??
Thanks again,
Tom in PA
Chris, I hope you get caught up with your other projects and give this a try again. I'm anxious to see some pics.
Tom, here is another file with the parts separated, nothing nested. All the holes mainly show location and I initially drilled all of them with a 1/8" end mill. I had changed the diameter of some of the holes when I changed the fasteners diameter and just drilled these out by hand. Don't change position of anything; maybe re-size depending on the fasteners you choose. Hope this explains what you need. If I can help with anything else, let me know.
Thanks Greg, I'll give it a whirl!
Tom in PA
Looks like fun. Thanks for the files.
As long as we are playing with mechanical designs, I remembered seeing this and being fascinated. I'm sure some of you have already seen this but it might be worth posting for those who haven't:
http://www.wimp.com/expandingtable/
http://www.dbfletcher.com/
Reminds me of the 'rhythm' clocks.
http://www.allabouttime.net/MivaImages/BNEW.jpg
Russ
I'm so glad you posted this. I remember seeing it awhile back, but was having trouble finding it last time I looked. It's bookmarked now!
Well here goes the 3rd iteration of this project.
I won't bother with posting #2 as it was just working out bugs.
Working parts milled in .093 brass
[ 1/8" non-ferrous 2 flute machining bit from Niagra Cutters, .3 ips, .1 plunge (ramped over .5"), 16k rpm, .02" passes = @ 3.5 hrs to cut ... I could probably up the speeds on this but i am still being conservative]
to be mounted in a nautical inspired mahogany door that I am in the midst of cutting. [design pic attached]
Thanks to Greg, I incorporated the gear you drew, and it adds a ton to the design. (note: your drill points for the shoulder bolts needed correction, FYI)
got some love at the So-Cal camp where I "showed & told" today. Best compliment was from Bill (Palumbo) who said "I want one, even though I have no idea what I would do with it"
When I get the cut file cleaned up, I'll post.
Chris
Chris,
That is going to be one cool door. Great job.
Where do you purchase your Niagar cutter?
Thanks
that is too cool.
That's beautiful, Chris! I love what you've done with this. What problem did you have with the hole spacing? Mine worked fine. Thanks for posting, Chris.
Greg
Nils, I bought the cutters @ http://www.centerlineind.com/ amazingly cheap too. around $6 for the 1/8".
Greg, it may have been a file translation error but when I brought your drawing into Rhino the shoulder bolt holes were just slightly non-concentric. the first backer board I cut jammed about halfway.
Chris,
I admire the dedication to seeing a project thru like this and like Bill I see things like this and say "I want one too", not that I would have a specific use for it right away but it's similar to this tool addiction we all suffer from, "we just have to have it!"
I have a suggestion for the outside of the door, if you have the modeling skills to model a mermaid in a pose in such a way that she is holding this opening or do some type of Jules Verne inspired design.
But why stop there! You could model the living room into the control room of the Nautilus complete with a periscope...(this is what happens when you watch too much tv as a kid!)
GOOD JOB CHRIS
Oh wow!
That looks great Chris.
Thanks for sharing and especially the inspiration.
I have a plan in mind using your iris design but its probably a few months before I can get started on it.
I can't wait to see it installed in the door.
Scott
Funny you should mention that Jack, The reason I havent finished the door as of yet is that I am still playing around with drawings for a carved Kraken (the giant squid that attacks the Nautilus in 20,000 leagues) motif for the outside of the door's upper panel.
I'm looking forward to seeing what you come up with. Keep up the good work.
I apologize for sharing a bad file. The bolt holes in the base were wrong. I evidently snapped the holes off center when I rearranged the drawing.
I re-saved these compatable to AutoCAD R14. I removed duplicate parts in the dwg file to make it small enough to upload.
Hey Chris - You mentioned above that you would post your latest cut files when you had them cleaned up. I am still interested in them, if they are ready. Thanks.
Chris,
I'm not sure if you are driving, or flying up to the Camp/Maker Faire, but if you ARE driving, and you have some room in your vehicle, I think everyone would really like to see this piece in person ! If not, please bring pix!
Bill, Ill be flying in, but it should fit in my suitcase. I'll bring it.
I might take the oppourtunity to ask around though if there is anyone who might be in the area that morning that could give me a ride with it to the gate. Last year I walked from my hotel, and it will be a pain to carry.
Stone Vill Inn San Mateo
2175 S El Camino Real
Brad, sorry I just need to merge several seperate files into one comprehensive one. Right now it is split up into a bunch of chunks to better utilize the brass I have on hand and wouldnt make much sense to anyone but me. But I promise I will as time allows.
Chris
Chris I have sent you a PM via this forum.
I got to see the 'portal' in person at Maker Faire and well let's just say it was a real hit! Great job! Russ
If you all hadn't heard yet, this Iris mechanism won an editor's choice award yesterday at the San Mateo Maker's Faire. One of the "best of the fair" ribbons. Got a lot of great press.
It was picked up by BoingBoing.net in their tech blog. And it is looking like I might be able to sell them through the BoingBoing Bazaar.
I am deeply indebted to everyone here who contributed to make this design better (and a reality at all).
Thanks everyone.
Chris
Make sure that those that contributed to the design get their 2 pennies per sale commission! That is very cool Chris...good job.
so i was stoked when i saw it on gizmodo, linked over to the site and downloaded the dxf files from the first page, editing them a bit to fit into my laser with the acrylic that i have and started cutting the pieces out, then i came back to read the rest of the post like a dum dum, and realized i downloaded the early files, lol.
well heres what i got from those first files, im going to try to finishing tweaking the newer design and cut it out this week or next. but for now heres my first go at it.
http://www.youtube.com/watch?v=r0y_uNoYqWM