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I posted a picture Instructable of this, and someone wanted me to make an instructable.
This mechanical iris has 6 segments, I plan to add more, it is "upgradable", as for that I can add more segments and fix broken ones. It can open and close smoothly, and it had a detachable strap to make it a monicle but I broke it a while ago
New thing: the first 2 people who make this will get a patch!
Edit: Win Guy already made one! look at the top comment and you will see it. There is only 1 patch left!
Step 1: Supplies
-Printout, image below
-scissors and hobby knife(Xacto Knife)
-snippers or plyers
-foam core, I used 1/4 in
-credit cards or gift cards with no protruding objects( I don't know now many I used, but I guess i used 3-4)
Step 2: Print out the paper
UPDATE: I finally made a real thing that you can print out instead of this image. Just print that out instead
Step 3: Cut it out
For the "combined" only cut out the shutter part of it
also keep the "extra cam wheel"s , they are need for alignment
Step 4: Glue it on
Using larger foam core, glue on the cam wheel and brass ring separately(far apart), also from the extra paper you have, cut out an extra cam wheel and glue it on, it is used later on to hold the cam wheel together.
Step 5: Make the container
For the second "cam wheel cut it out like the "brass ring" a circle
Make sure to cut out the inside also, thats what the xacto knife is for.
When you are done cutting it all out, glue on the "cam wheel" segments to their place on the second cam wheel(it has markings for where they should exactly go(I dont have any pictures of that because i made it a while ago(The second picture should help, you can see the lines)))
Then get a piece of paper and wrap it around the "cam wheel" like shown in the picture and glue it
With a pin poke holes in the "brass ring" where it is marked.(3th picture)(every other hole)
Step 6: Cut out the segments
Step 7: Cut and glue on the paperclips
6 each and each about 7 mm(close to exact)
Another 6 each and each about 10mm(it could vary, but not much)
Sorry for the conversion(inches to milimeters) The milimeters are more exact
In the picture,the top one, the paper clip to the left is the 10mm and on the bottom one the one to the right is the 7mm one
Then put the paper clip pieces through the holes you made and use super glue to secure the hold of the paper clip to segment
Step 8: Put it together
Then put it in the "cam wheel" and line up the paperclip on the segment with every other line(this is meant for a 12 segment iris)