MAKE: PROJECTS Eccentric Cubicle filled the purpose, once I'd holed out a piece of MDF to cradle the drive and center the shaft accurately and filed away a bit of metal to give the AC leads somewhere to go. I padded the inside of the front face of the case with a layer of craft foam to dampen the motor noise a tad. [Figure 09.36, Figure 09.37] Just by itself, this is an entirely trippy mechanism to watch operate. This level of trippiness pales in comparison however, to the Antarctically cool scene presented when the bellows are attached to the mechanism and it's actually moving air. Which means that the sooner the bellows come into exis- tence, the sooner the spectacle unfolds. The Bellows I made two of the things in the sketch. With a stroke of about 11½", each 4" diameter bellows bladder generates about 1 / 12 of a cubic foot of air per cycle. At 6 RPM, the twin bellows deliver a single cubic foot of air per minute. This is paltry compared to other methods of air movement, but the positive displacement characteristics of the system make every cubic inch count. Vapourized fog juice flashes to a vastly increased volume, which is gonna force it through the circuit regardless. The airflow system is just there to help put a wiggle on the process. And to look relentlessly cool. Which it does. Figure 09.36: The motor housing: repurposed dollar- store canisters, a bit of craft foam, and some MDF Figure 09.37: The inner secrets of the drive motor case. 270