Project 3 - Name Plates and Rotary to Linear Motion

Project 3 - Name Plates and Rotary to Linear Motion Chad Wakamiya | February 26, 2020  Product Photo  Bill of Materials  Process Photos  Process  Files  Sources  Product Photo      Bill of Materials  Item  Description  Qty  ⅛\" x 18\" x 30\" from Jacobs  1   Plywood    6 mm diameter  1   Titebond Ultimate III  1  Dowel  Wood glue       

Tool  Info  Laser Cutter  To cut wood out.  Sand paper  200 grit to sand off scorch marks on wood.     Process Photos  Photo A: Initial Design     Photo B: Partial Assembly of Final Product    Photo B: Completed Final Product 

Process and Description  My  rotary  mechanism  is  a  crankshaft  that  makes  a  little  loch  ness  monster  rise  up  from  below the water surface. The operator turns a handle which spins a gear train that causes  the loch ness monster to be pulled and pushed up and down.     I used an online gear generator to make the gears. The website produced a .dfx file which I  uploaded into another site to convert into a .svg file which I could then open in Illustrator. I  designed all the pieces in Illustrator. My first design was a little simpler. It had only 2 gears  and a crank attached to the the smaller gear on the reverse side of the wall that the gears  are attached to. I realized that the gears brought a nice aesthetic, so in my next iteration I  placed the crank on the front side of the mechanism so the gears would be visible.     I found the variation in the laser cutters difficult to work with. I toleranced my holes to  create both tight fit and loose fit holes. The cuts I made last week were the right size,  however, the cuts I made this week were not as sharp and tended to destroy more material.  I believe the laser lens may have been less focused or the wood was slightly warped. As a  result, I had to cut my pieces out twice and adjust the laser settings.     The piece that the loch ness monster is attached to and moves up and down was the most  frustrating. When I initially made the design, there was too much friction so the loch ness  monster would not go up and down smoothly. I learned to sand the pieces around this  piece to make the movement smoother. Also, the part that moves up and down has a very  small piece that holds the two sides together and I had to make multiple cuts to account  for the laser kerf on this small piece.     In another iteration, I would have cut the dowel lengths more precisely. Some of the  dowels are slightly longer than they need to be. I would have also been a bit more careful  with the glue and used a laser cutter that did not burn as much away.     Files  Name  Link  Laser Cut File  https://drive.google.com/file/d/1WEq6lplcM4vtsqCEcAtDWR1eYZ Video   40yM9V/view?usp=sharing  https://www.youtube.com/watch?v=iV-OX7jXUoI 

  Sources  Gear Generator Website: ​http://hessmer.org/gears/InvoluteSpurGearBuilder.html