by d_goodman, published
Made for a class project. The assignment was "make a thing that makes a thing then make that thing with the thing". I am in a fraternity and know overdrinking is a problem because people can't eyeball a shot for shit. This device cuts a standard Solo Cup at the line that approximates what a shot should be. See video for demo.
- Print out all the components
1.5 Consult the pictures! I can explain stuff but everything should be self explanatory if I fail at that.
- Get a hobby knife because things don't fit perfectly off the bat. Any step may require filing/sanding to get stuff to fit well.
- Get fasteners ranging in length from .25"-.5" with ~.1" diameter.
- Screw links onto each of the knife holders
- Sandwich the other end of the links between the upper and lower shaft coupling.
- Find .2" rod/dowel/shaft about 7" long and drill a hole through it where the upper shaft coupling hole is when it is placed in the opening.
- Place top cap over entire system and put fastener through the upper shaft coupling and shaft to lock it in.
- Take the stem and place it over the shaft. Use the long fasteners to screw everything together.
- Take top knob and place it in the top of the stem.
- Cut shaft to ~.25 above the top knob
- File down a flat section so that there is a gap between the knob and shaft.
- Wedge something in the gap to prevent the knob from free spinning.
- Twisting clockwise causes the tabs to come out of the housing. Identify the slots in the knife holder tabs. Place the end of a knife blade in the holders so that when the stem is turned CW, the knife is cutting. **one blade works fine
- Retract blade, place thing in solo cup, watch fingers and turn the knob. Turn the stem to cut.
- Take shot.