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2.1 Sub-Mechanisms

We had two distinct mechanisms within our project that we continually aimed to mesh effectively in order to create a smooth opening and pouring motion.

Quick Return Mechanism

Geneva Mechanism

Purpose: To generate enough torque to remove the bottle cap completely without damaging the bottle.

Purpose: To rotate the bottle after the cap removal motion is fully completed. Timing is imperative in the utility of this feature.

2.2 Material Choice

Since we knew that the use of 3D printers and laser cutters in TIW were relatively inexpensive we chose to design the majority of our mechanisms with these materials. We used an acrylic sheet for our base because it is sturdy, can be cut with the laser cutter, and allows a viewer to see all internal mechanisms/view the project from both sides. We laser cut the majority of our links and gears with plywood because it was very inexpensive, accessible, and strong enough for our application. The remainder of our links, particularly those that needed three-dimensional geometry, were designed in Solidworks and printed using 3D printers supplied in TIW. Some fasteners and standoffs, the Geneva mechanism, as well as the bottle holder were also 3D printed. Finally, our bottle opener, bearings, and the remainder of fasteners such as bolts, nuts, and washers were bought off of Amazon because the shipping was very quick and the parts were inexpensive.

2.3 Actuator Development

Table 1. Actuator Development

 

Greartisan DC 12v Motor

Servo

Specifications:

Rated Torque - 3.6 Kg-cm

100 RPM

Specifications:

Torque - 22.8 Kg-cm

23 RPM

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