Hocki

Hocki
(Highlight text)
Year Of Creation	2020-2021
Versions
Current Version	1.0
Update Year	2020-2021
Wins/Losses	Did not fight
Information and Statistics
Weight Class	Hobby Weight
Weapon Class	(Translational Drift Spinner/Meltybrain)
Combined Wins/Losses	Did not fight
Weapon Speed	3600 RPM

Hocki is a Meltybrain, a combat robot that spins itself to attack. Unlike other robots, which have a stationary frame and spinning weapon, in this robot the entire frame is the weapon, and the robot spins itself to attack. This allows the robot to store more energy while spinning slower, which allows for hits to connect better. Such a design requires a control system which uses sensors to estimate the position of the robot. This robot utilizes custom circuitry and software to allow the frame to move, spin, and attack.

Competitions

Due to COVID-19 this robot did not go to competitions.

Design

(Hocki) V1.0

Team Lead: Valentin Richter

Team Mentor: Varun Madabushi

Members: John Bowzard, Kevin Xiao, Madeline Belew, Steven Zhao

Drive Motors	Scorpion HKIV-4020-860KV
Drive Motor Controllers	iFlight SucceX X80A
Receiver	FS-A8S
Remote Control	FS-i6X
Battery	2x Turnigy Graphene Panther 1200mAh 6S 75C Battery Pack w/XT60
(OTHER:)

Mechanical

Overall Design and Construction

The robot is comprised of an aluminum ring with aluminum top and bottom plates bolted on. All interior components (electronics, drive assembly) are sandwiched between the two rings.

One priority in the design is increasing the moment of inertia as much as possible by moving heavier components outwards. The main structure of the robot is the aluminum ring, which is CNC machined out of a single piece. This CNC machined part was ordered from Xometry due to obstacles in HAAS training and shop access due to the COVID-19 pandemic. After receiving the ring, it was tapped to accept screws which hold the top and bottom plates as well as the impactor tooth. The top and bottom plates were machined on the waterjet cutter and sanded to fit the grooves in the ring, as well as the motor and wheel mounts.

Another priority is keeping the center of mass centered at the midpoint of the wheels. If it were not, the kinematic center of rotation would be far from the dynamic center of rotation, resulting in drift and preventing the accelerometers from accurately measuring the centripetal acceleration. Thus care is taken in the placement of interior and exterior components to balance the robot.

We selected a 1-tooth design as the 1 tooth can cancel the weight of the motors in the back.

Drive

Describe structures/mechanisms here such as Drive, Ring, yada yada

See also

• Chonkii

Notes:

(random joke, optional)

Named after its resemblance to a hockey puck

Original Builders: Afshan Chandani, Varun Madabushi, Juan Elizondo, Hank Hellstrom, Darren Kosen, Nelson Jiang, Valentin Richter, Kevin Xiao, Sarkis Ter Maritorsyan, Keaton Sadoski, Alex Yu