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Post by Tanguy on Apr 5, 2016 12:46:10 GMT
Hi, as a student project I'm a currently trying to make an enigma machine without any electronics, the same way it was done during the war. As a basis I work with the technical plans given by the website: enigma.hs-weingarten.de/download_drawings.php. and a lot of other pages .... Still 2 points give me a hard time: the first one is how to calculate the size of the buttons to give the impulsion to rotate the rotors. image from users.telenet.be/d.rijmenants/en/enigmatech.htm#steppingmechanism:I tried to calculate it with the approximation that 3 must go up vertically of 2*Pi / 26 *radius (circle arc of the rotor tooth) of my rotor but the figures I obtain are bad.... The second issue i have is about keyboard (image ) I have no clue how to realize the switch and the technical plans I have doesn't explain a thing... If you have any documents/links to help me it would be great, Thank you by advance for your help, PS: If there is any spelling mistake sorry I'm not fluent !.
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Post by Arduino Enigma on Apr 5, 2016 16:49:24 GMT
As far as the rotors go... prototypes... prototypes... With 3d printing, it is easier to do complex shapes. You have to learn a CAD program though. Here are some pictures of the key contacts. enigma-replica.com/status1.htmlThey look like old style relays. One normally closed contact above, a middle movable contact and a normally open contact on the bottom. The key moves the middle contact from its normal upper position (NC), connecting the entry rotor to the lamps, down into the bottom position (NO), sending current into the entry rotor and through the machine. It will come out on another position on the entry rotor and it will go through the NC contact to a light bulb. This design obviously assumes only one key is pressed at a time. Good luck
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Post by lpaseen on Apr 5, 2016 23:36:50 GMT
Issue one, what Arduino Enigma said - try and error. It does exist some drawings at www.enigma.hs-weingarten.de/drawings.php (you need to give them an email to send the info to) and there you can see the exact sizes of a lot of parts. Lets try some math: Say that the rotor dia is 100mm inside the rotor is the toothed wheel with a dia of 72 Then the circumference of the toothed wheel is 72*pi=72*3.1415=226.1880mm 226.1880/26=8.699mm but that is a 26th of a circle and the pusher goes straight up plus the tooth depth it's not exactly 8.7mm and I'm not going to try to get that number but it should close to 8.7mm Second issue, the solution depends on how close to original you want if exact then the only option is to look close at the switch in the picture down to the right on www.enigma-maschine.de/en/the-replica/keyboard (pic 993) and replicate that. The url Arduino Enigma gave shows a different style when when you hover over the "switch" button (dunno wich one - if any - is correct b. If "anything that works" is ok then you need to come up with a way to have a switch that switch between it's two positions after each other it is not that easy to see on that picture but upload.wikimedia.org/wikipedia/commons/5/53/Enigma_wiring_kleur.svg shows it a bit better. if you search for leaf switches like www.ebay.ca/itm/10x-1P2T-Mini-Stroke-Leaf-Switch-DC16V-1-5A-103-e1-/162028871004 and place them properly maybe you can come up with something that works. (I seem to remember that it was two switches per key but can't find that except for the cases where external equipment was attached)
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Post by Tanguy on Apr 6, 2016 9:30:22 GMT
Hi, Thank you ! We are already working with Solidworks to prototype most of the complex pieces, others will be handmade. Thank you Arduino Enigma, I think I understood the principles.
Yes lpaseen I did the same work and I have almost the same results (8,4mm) but when I do the math to obtain the angle of rotation: the distance between the axe and the axe of the driver is 102mm arctan(8,4/102)=0,0821 rad = 4,7 degree Distance between the letter and the axe : 120mm so tan(4,7deg)*120mm = 10,1 mm at 80mm tan(4,7deg)*80mm=6,5mm at 100mm: 8,23mm But when I read the drawings from the HS weingraten, the size of each button is 64/72,5/81 and the difference of size from the keyboard is 10,7/19,2/27,7mm. i don't obtain the same results.... But you're right if there is an issue I could always adapt the size later !
Thank you for your link it was exactly what I was looking for. I will try to implement it with solidworks to check for the size ! .
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Post by Arduino Enigma on May 18, 2016 4:16:49 GMT
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Post by ZZ9pZa on May 18, 2016 5:38:20 GMT
Wow this is very cool.
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Post by lpaseen on May 18, 2016 12:37:22 GMT
First time I see a closeup of the double step I suspected the reason was something like what I see but it is good to get things like that confirmed.
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Post by Tanguy on Jun 15, 2016 19:12:41 GMT
Hi, to give you an update we succesifily made all parts. The rotor rotation works but we still have some issue with the pins of the rotors. We did a website (partially in french and in English) : repliqueenigma.wordpress.com/fabrication/ if you can give me your opinion it would be helpful! I'm still writing most of the pages but some are finished. Thank you again for your help !
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Post by lpaseen on Jun 19, 2016 13:16:00 GMT
Good job I know it's several pics of the interiors of the rotors where you can see how the pins are done but I guess you have to come up with some other solutions since I guess it's hard to 3D prints 26 small springs (among other things).
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Post by Arduino Enigma on Jun 22, 2016 4:04:07 GMT
@tanguy, congratulations. your 3D prints look good. The next challenge is getting those wheels to conduct electricity. Keep at it!
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Post by lpaseen on Jun 22, 2016 11:51:26 GMT
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Post by Arduino Enigma on Jun 22, 2016 21:58:13 GMT
That is a very impressive build. The next step is to print functional rotors. That should be fun. So far the most impressive build I have seen is this one: www.enigma-maschine.de/en/the-replicaOne of the pictures shows enough parts for 10 machines. I wonder where those are going...
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Post by Arnaud on Jun 24, 2016 14:53:06 GMT
That is a very impressive build. The next step is to print functional rotors. That should be fun. So far the most impressive build I have seen is this one: www.enigma-maschine.de/en/the-replicaOne of the pictures shows enough parts for 10 machines. I wonder where those are going... Holy cow, this is not a replica anymore, it's like building an original with newly made parts. This dude is like a one-man factory, even more, factories usually have some parts made elswhere, he does not.
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Post by Arduino Enigma on May 16, 2017 14:53:00 GMT
It seems that www.enigma-maschine.de/en/the-replica has not stopped working. Just noticed that there is a May 1 2017 update How many machines do you think are being made and what is the price point on this?
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Post by lpaseen on May 17, 2017 4:33:45 GMT
I'm happy to see progress there, and it looks like it's a lot of parts. I'm counting 97 letter rings in the red box, 97/5=19.4 or 97/8=12.125 so rotors for at least 10 or up to 19 machines just in the red box. Hope they have as much part for the rest. Price point - I think your guess is as good as mine.
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