Craisin Acceleration: Why Size and Weight Matter

For a few days, the food rewards inside my apparatus was not dispensing properly. I had wondered what the problem was and like a good scientist that I am, I wrote down all my hypotheses and tested them.

The food reward is too sticky thus sticking to the cup: It was definitely not that the food reward is too sticky. Almost all of them would fall out of the cups.

The distance of cup to chute was too far, therefore the food reward is falling outside of the chute: Wasn't the distance of cup to chute either, although I thought initially it was so as this apparatus was designed with small grapes in mind, not craisins. The food reward was falling into the chute most of the time but there are a few times when it would fall after it passes the chute. It's not a significant reason why the food reward is not dispensing properly.

However, I had an Aha! moment when I realized that the food rewards that didn't get dispensed properly are small pieces of craisins. WEIGHT! It was weight. I need to have craisins that have enough mass to fall from the cup as soon as it drops down and accelerate into the chute. I bought some "whole craisins" which are basically craisins from whole large cranberries instead of varying sizes. I'm happy to report that the food rewards have been dispensing properly today.

Size and weight do matter when it comes to being dispensed properly in my apparatus. Have I mentioned how much they LOVE craisins?