Mechanical computer "The Turbo Entabulator" that you can create yourself with a 3D printer

The mechanical calculator that the power is handwheel handle and the data record is made by the punch type card reader so that it can be made by 3D printer without using any electronic parts "The Turbo Entabulator"is.

The Turbo Entabulator
http://www.chrisfenton.com/the-turbo-entabulator/

◆ Punch card reader part
Chris Fenton, an electrical engineer living in New York, produced this calculator. The original card reader formerly made by Fenton used three hooks.


However, we increased the number of hooks to 10 in order to activate three parts (below counter) to count the numbers. Also, by improving the structure of the hook, it became possible to stretch the thread part connected to the hook longer, and it became more robust structurally. Drive shaft with handlecrankBy attaching it, usability is improved.


◆ Counter (Parts that display numbers)
I reached a single mold by repeating about 20 failures, but when the parts are clogged, the parts are chewing, the parts are bent, the parts are bent, wobbly, etc. and do not work well there is.

Each counter is assigned two hooks, which rotate the numerical display.


When the lever with spring attached to each counter is raised, it always shows the number 0. And hooks other than those allocated to each counter are used to lower this lever. When it is a photograph, the counter in the middle just shows that the lever is rising and 0 is displayed.


◆ Action
The state of operation of this mechanical calculator can be seen from the following movie.

The Turbo Entabulator - a 3D-printed, mechanical computer - YouTube


The parts data necessary for assembling this mechanical calculator isPublished in ThingiverseSo anyone can make it freely.