Holidays are always filled with joy, and people hope to spread happiness by scattering money, just like the God of Wealth.
Drawing inspiration from the principles of traditional printing machines or currency validators, I built a simple “money-spraying machine” (a cash-throwing device) capable of rapidly “projecting” cash. At first, I tried spinning the shaft directly, but my hand speed wasn’t fast enough. So I designed two gears with a 5:1 gear ratio, which increased the rotational speed fivefold and greatly improved the throwing efficiency.

Since this is purely for entertainment, the current version is already sufficient for use.

Although there may be some minor issues—for example, due to differences in materials, the shaft assembly is quite tight, making it difficult to control tolerances—too loose would also be problematic. Therefore, I left only a clearance of 0.2–0.3 mm, successfully completing the assembly.

Additionally, for the friction wheel section, I kept only a single wall layer, so the print quality might not be ideal; however, these small imperfections don’t affect functionality. If you’re aiming for perfection, you can apply a thin coat of adhesive (such as LAC) within this area.

If you have filament in gold color, you can use it to print the yellow parts.
Wishing you a happy holiday and lots of fun!