Curta Calculator Mods

I made a number of design modifications that I felt better supported 3D printing and the use of plastic vs. metal components.

3/28/19
Added case/container files.

Tens Sliders

I believe that Mr. Wu’s STLs for the Tens Sliders were based on models of the original metal versions of the components. I had trouble with my 3D printed sliders because the arms that engaged the Tens Barrel were too fragile and too flexible.

I redesigned them so I didn’t need to enable supports for the parts, and made them stiffer. Also I added a fillet to the surface that engaged the transmission gear teeth so they were less likely to snag on the edge. After the print is complete, I used some dykes to snap off the support for the ‘tab’ that engaged the Tens Barrel.

Figure 1: Tens Slider for Turns Counter

I suspect that the holes in the sliders are an artifact from the original metal design. I couldn’t see any obvious use for them.

Figure 2: Tens Slider for Results

I also modified the