They 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.
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
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 ! .
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 !
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).
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-replica One 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.
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.