MAKE: PROJECTS Eccentric Cubicle Figure 08.09: EPS grid interface positioning, facilitated by conveniently placed mould feature Figure 08.10: The humble yet versatile barbecue rotisserie motor. New School/Doesn't Sound Like an Unfortunate Blender Experiment model. goods" area of an enlightened scrap yard are superior sources. If you find them in quantity, buy 'em all, and grab any of the square barstock spit shafts you come across as well. You never know when you might need to animate a win- dow display. [Figure 08.10] I'm assuming your support strut fabrication went smoothly and that the top opening of the elbow is reasonably level. We're going to cram a bunch of stuff into that hole to hold the driver motor and the mirrored head. As is so frequently the case, you need to cut some cir- cles out of wood. Sandwich 4½" square pieces of ¼" and 1 8 " plywood with double-faced tape, mark the center, and / cut to 4¼" diameter. This stack should fit easily into the top hole of the elbow and rest firmly on the inset lip formed where the elbow constricts to 4" diameter. These are the main plates of the turntable assembly and the mirrored head, respectively. The shaft receiver of the motor is 5 / 8 " diameter, so drill out the center of the ¼"-thick disk to that diameter, and sand the hole about 1 / 32 " larger for clearance. [Figure 08.11] Fitting the motor to the baseplate will take some bodging. In order to drop the drive assembly down to the point where the shaft receiver is flush with the top of the baseplate and the whole lot will actually fit into the elbow, you need to add some spacer battens to the underside of the base. [Figure 08.12] These have to be custom-fitted to match the drive motor mounting configuration, and as there's at least eleventy mil- lion different styles of drive motor, you'll have to figure out the exact dimensions you need on your own. It's worth noting that while simple stand-offs will work, in the interests of noise suppression, maximizing the amount of material actually in contact with the case of the drive motor is a desirable thing, as it dampens the resonance of the case and helps to acous- tically isolate the motor. Size and fit the battens to the drive motor, then glue and dowel them into position on the base- plate. [Figure 08.13] Rotiserrie drives are geared for torque and built for endur- ance; after all, they're expected to have the wellie to spin large pieces of dead pig for hours at a time. That said, the less work they have to do, the quieter they are, so reducing fric- 218