Rod Logic
Based on the plan in the previous post, I have completed and tested the spiral cam drive. First, I cut to size some aluminum round stock on the lathe, and drilled a 3/4-inch hole through, also on the lathe, for the Acme rod. This became my blank. Next, I wrote a program to generate GCode [...]
Continue reading about Completed: Spiral cam drive, intermodule connectivity
Here’s an explanation of how I implemented noise margins for the Logical Engine design. Recall that rods have holes for bumps every 0.3125 inches (5/16″), and that the spacing between rods is 1/2″ vertically and 0.625 (5/8″) horizontally. Also, I am using 1/4″ hex standoffs that have the following measurements: Here’s a setup which [...]
So now that I’ve had a chance to think long and hard about the design of the arithmetic logic unit, or Logical Mill as Babbage would have called it, I realized that I had several errors in the previous discussion. I also reorganized the Mill to make it possible to increase the number of bits [...]
Wherein a device is shewn to compute various logical functions.
Continue reading about Logical Engine No. 1 demonstrator model completed, with video
Brass, brass, wonderful brass. It’s Victorian and steampunk and all industrial-revolutiony. Let’s build a rod-logic brass analytical engine! A hundred years from now, someone will take this design and actually build it, putting it in a museum as “an example of an early 21st century computation device in the style of the alternate-reality subgenre known [...]
Wherein an alternative Mechanism is shewn, which can transmit the linear Motion of Rods from one Point to a different Point.
Continue reading about A different linear transmission mechanism
Wherein several and sundry logical and mechanical Details of the Digital Arithmetical and Logical Mill are discussed.
Continue reading about Babbage-Boole Digital Arithmetical and Logical Mill: Part 2
Wherein the Babbage-Boole Digital Arithmetical and Logical Mill is designed.
Continue reading about Babbage-Boole Digital Arithmetical and Logical Mill: Part 1
Wherein a Design for the Storage of digital Data within the Rodulator is shewn.
Wherein a possible Mechanism for the pushing and restoring to their resting State of Rods is posited.

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