Feature Design Comment Strategy Comment Contributor
Intake I like the simplicity of this intake. 4" wheels are a bit bulky, but with so many of the 2" COTS mecanums being sold out, 4" wheels may the only option for teams who are determined to use mecanums on the intake. Nice to see a proven concept. The linear extention of the intake is a cool concept, and a nice approach for teams who may not feel comfortable designing a rotary linkage using pneumatics. Karthik
Intake Taking advantage of drawer sliders is a good way to create linear motion, but it can be difficult to create good alignment when building a robot with only handtools. This linear mechanism also limits the amount of adjustments and iterations without changing a lot of the robot. I'm cautious the robustness of using wood  in a portion of the robot outside the frame perimeter. I'm not a fan of needing to actuate the intake in and out to swallow each ball into the robot. Setup of the intake wheels is nicely optimized around off the shelf components. Using 4" wheels keeps more options on the table and gives a high surface speed for ball intkeing This mechanism choice packages well, but limits adjustments which makes iterations harder. The need to actuate with each ball intake creates more room for mistakes and errors on the field. Mason
Shooter (2pt) It works. That's a good thing. However the lack of rigid mounting of the shooter wheels and shafts concerns me, as to how it will hold up over an entire season. Even within an event, the ball compression levels may vary creating inconsistency in the shot. Karthik
Shooter (2pt) The shooter design is straightforward, requires no more than handtool alignment of parts. This requires low compression on the ball which helps simplify the motor power needs and complexity of speed control With two side wheeled shooters, no spin is put on the ball which can limit accuracy. This robot will do best shooting near the goal Mason
Feeder The use of 4" inch wheels as feeder wheels works if you don't have other options, but it's kind of bulky and heavy. I'd prefer 2" AM compliant wheels or WCP/VEX flex wheels. Even smaller/ligher would be to use polycord or urethane flat belts (both available from WCP) Karthik
Feeder Design wise, this needs more parts, spinning shafts, bearings, and alignment than many of the other Ri3D options. Between the belts and axels, this design has a lot of pitfalls if trying to create without some experience in the area Without a stop before the ball enters the shooter this design makes it difficult to shoot the first ball, and forces the drivers to be very careful of when motors are turned off and on. This robot layout limits the amount of balls that can be stored. Mason
Control Panel Using the shooter to do the control panel is brilliant! One less mechanism to design and build. The fewer mechanisms you have, the fewer things that can go wrong on your robot, plus you have more time to spend on the rest of the robot. Also, you save money! Karthik
Control Panel Effective and a dual purpose mechanism. Grippy wheels on the control panel is a clear design winner this year. Be cautious that your shooter won't break if your driver pushes the robot too hard into the control panel. Lots to like: Great reuse of the shooter, no need to deploy a mechanism, easy for a driver to align. Mason
Intake Jam Looks like the ball found a dead spot. All teams need to be aware of these this year; unless you're intake wheels are maintaining solid contact with the ball, these balls aren't going to go where you want them to. (Especially if they're touching another ball) Karthik
Intake Jam Needing to actuator the intake to clear a jam should be a last resort. By adjusting wheel type, number of wheels, spacing of wheels, bumper material, or even cleaning the intake wheels, a problem of this nature could be allieviated. The most successful teams each year work tirelessly to tweak robots to avoid situations like this. Building a mechanism that allows for tweaking and adjustment to elimate problems like this will lead to a more succesful season Mason
Hang I appreciate that they shared a failed hang. This process is imperfect; lots of things won't work and that's okay. You won't find the optimal solution without failure. Karthik
Hang During high load applications like hanging, under-designed mechanisms will flex and bind and become incredible inefficient. This design didn't think it through. The hooks should be much larger to allow easier driver alignment. The hooks should have grip on them. Without improving the likely-hood of a successful hang, this mechanism isn't worth the effort. By deisgn its difficult to line up, will slide on the bar if the hanger is angled, and is difficult for drivers to align. Mason