This is a Bumper Case for a Texas Instruments SR50 (or SR51A) calculator

(from the mid 1970's)

I printed these in 2 types of flexible filament:

Gizmo Dorks Flexible TPU - TPU with a shore hardness of 96A

3D Solutech Real White 1.75mm Flexible - TPE? shore hardness unknown

(Printed face down using tree supports in Cura)

You may need to experiment with percent infill for good flexibility,

so it's flexible enough to get onto the calculator.

What worked for me was to insert the bottom of the calculator

(from the front of the case), then one top corner, and then the other top corner.

My FreeCAD design file is included.

Designed in FreeCAD 0.19, sliced in Cura, printed on a Prusa clone using OctoPrint

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