7/3/22 Fabrication of Pivot Design

Colin Szeto

The team was able to utilize past land vehicle design game pieces from FIRST Tech Challenge Relic Recovery

I printed out a 1:1 sheet of the bottom of the racquet ball turret plate.

This template was used as template to center punch and drill the interface holes the plate and the racquet ball launcher.

Final through holes

7/2/22 Pivot Design

Colin Szeto

Inspiration for this design came out of farm pivots that are used to water crops in a radius around a pivot point. This allows the team to add on a yaw motion to our racquet ball launcher. This was the final update we needed to do before the Mechanical system was complete and ready for the programmers to program.

front view 

Side view

Top view

ISO view

Animation of the turntable yawing 

The sprocket will be flat on the floor

This is the turntable system that was used in FTC Freight Frenzy 2021-2022 season

The motor connected to the turntable will be connected to the rev bars underneath the shooter

The main sprocket will be stationary and the motor will rotate with the launcher assembly

ISO view of launcher on a plate

We can mount the turntable onto a base plate to ensure that when the motor spins, the shooter is the component that turns and not the base of the turntable. 

3/13/2022 Racquet Ball Launcher Progress

For "2.5.7 Task 7 - Find and Fling" teams are tasked with launching a racquet ball about 2 inches in diameter into a goal floating in front of the WAM-V vehicle. 

	Current Configuration Supports only one wheel for launching the racquet balls Does not have a very aggressive tilting option (Note: the target will be below the platform of the WAM-V)
	Future Configurations Use 2 counter rotating wheels to reduce spin & to ensure that the ball floats into the goal and has no chance of bouncing out Very aggressive tilting options may not be needed as the target will be below the platform of the WAM-V

Link for determining gear ratio here

We got inspiration for hood design from the robot FRC team 1678 Citrius Circuits made in 2021. Below are screenshots of their shooter CAD side, front, top, and isometric views.

CAD of our current design with hood here

Using Onshape for their gear feature script is much more forgiving than the Fusion 360 gear script which has no option to revert and edit existing gears.

Video to learn about the feature script here

Feature script example can be found here