Presentation
The goal of this project is to build a replica of the M-94 device that could be used to decipher actual M-94-enciphered messages, and make it as close to the original as possible while remaining economically feasible. For this reason it will be mostly 3D-printed, with some metal parts.
The first step is extensive research to ascertain the shape and dimensions of every part, for an accurate reproduction.
The device can then be modeled.
Parts are 3D-printed, tested and adapted if necessary.
Necessary metal parts are machined or outsourced.
3D modeling
The device is composed of the following parts (for a more precise description, see Technical infos):
- 25 discs, each with a different alphabet on its rim
- A shaft with a knurled flat nut at the left end, and threaded at the right end
- A left end cap
- A right end cap with a straightedge
- A thumb knurled nut
A stand is also designed.
Name plate
3D printing
The quality of the first discs printed was unsatisfactory.
It may be due to the filament (quality or type) or the printer, or the discs may be too small to be printed with acceptable quality on a filament printer. In that case they should either be scaled up or printed on a resin printer.
Tests are ongoing with different filaments and configurations to improve the result.