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0.2mm layer, 2 walls, 15% infill
Designer
4.1 h
4 plates
Version 2.0, with 3 replaceable track belts
Designer
2.4 h
3 plates
Open in Bambu Studio
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Description
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A model of solar apparent motion in the 30°N region, allowing students to observe intuitively. A miniature light bulb simulates the sun (available inexpensively on Taobao, 1.1cm diameter—search for it yourself. A shell is added, but this is optional and doesn't affect usage), enabling observation of the gnomon shadow's length changes throughout the day.
The transparent casing is a purchased 10cm diameter acrylic sphere, using the half with the snap-in recesses. This allows the horizontal plane disc to be inserted perfectly. When inserting, ensure the horizontal ends align exactly with the equinoxes solar apparent motion trajectory (yellow line).
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