This pinball-style coin-operated slot machine can accumulate coins until a coin falls into the middle slot, and then - ding! - all your coins will return to the payout tray. You only need about 20 cents to play.

This slot machine is designed for American pennies

Note: The lid looks like a solid, opaque component, but if you check the settings of the 3MF file, you'll find that the top and bottom layers are set to zero during printing, with a fill rate of about 10%. This will create a beautiful translucent grid. Feel free to experiment with different fill patterns and densities to achieve different effects.

How to play the game

Although it's fun enough to put the money in, watch it bounce around, and eventually get it all back, it's actually a great multiplayer game. Just take turns with one or more friends, each putting in a coin at a time. Over time, the chances of someone winning will increase.

Assemble
During assembly, you need four filaments with a length of about 12 mm and a diameter of 1.75 mm as pivot pins. These components should be firmly pressed into the left and right side doors and latch components, as shown in the figure below. At first, they should be flush with the top of these components and protrude slightly at the back.

Next, assemble the door component

The filament pins protruding from the back of the pinball board need to be cut flush. You can use a flush-cutting side cutter to do this, but if you can't cut the pins completely flush, you can trim them with a razor blade or a craft knife.

Then, install the latching component through the lower hole. Make sure the door can also rotate easily. Trim it as well.

Repeat the above steps on the other side:

Now slide the marble board into the base until it is completely in place:

Finally, install the cover grille. It should be gently pressed into place: