Our goal: Build a cannon and base using PVC and wood. Our base needed to be able to move our cannon along the X and Y axis. If we do a good job then we should be able to hit a target.
Both of the photos above are screenshots for our prototype. we created these on onshape. we have our base and ladder type things that will hold our cannon. A pipe will go through the holes to change increments on the Y-axis.
This is a screen shot of a piece of our lazy susan. it was also created on onshape but this is a 3D version of our piece. Onshape is a "wonderful" tool for us engineers to bring our brainstorms to life. The holes are for the pieces we created to move our cannon up and down the y-axis. and to keep the cannon in place.