Why study other robots#
The single fastest way to level up is to study how the best teams solve a problem, then adapt (not copy) it. The Open Alliance is a group of teams that publicly share CAD, code, and build threads on Chief Delphi and GitHub specifically so the whole community improves.
Case study 1: FRC 6328 A-Frame Pivot#
A triple-supported (A-frame) arm pivot documented on FRCDesign.org. Key takeaways:
- Torque analysis drove the reduction choice, sized from worst-case gravity torque, the same math from the worked-examples module.
- Dead-axle clamping in dual shear for stiffness under load.
- Custom gearbox packaging tucked tightly to save weight and space.
- Serviceable joints so the pivot can be repaired at an event. 6328 (Mechanical Advantage) also publishes their code on GitHub and runs Open Alliance build threads each season, a goldmine for advanced controls (their AdvantageKit logging framework is widely used).
Case study 2: FRC 1678 Rapid React Shooter#
A flywheel shooter writeup covering backrollers, flywheel mass, hood actuation, spin control, and practical tradeoffs. Lessons:
- A backroller adds controllable backspin for a flat, repeatable trajectory.
- Flywheel mass trades shot consistency (more inertia = stable exit velocity) against recovery time, decide based on your cycle needs.
- Hood actuation lets one shooter hit multiple distances; tie hood angle and RPM to a distance lookup.
Case study 3: FRC 2910 Dead-Axle Pivot#
A pivot writeup emphasizing chain tensioning, load paths, and serviceable structure, proof that elite mechanical design treats wiring and serviceability as first-class, not afterthoughts.
How to reverse-engineer responsibly#
- Read the build thread to understand the problem and the iterations (what they tried and rejected, often more valuable than the final design).
- Open the CAD to study load paths, fastening, and packaging.
- Read the code to see how the mechanism is controlled (feedforward, profiling, state machines).
- Adapt to your constraints, your motors, weight budget, and game are different. Copying a design you don't understand fails when it breaks and you can't fix it.
Build your own knowledge base#
Follow a few Open Alliance teams each season (6328, 254, 1678, 2910, and others), and keep notes on techniques worth reusing. Combined with the characterization, simulation, profiling, and structural skills in this module, studying real robots turns 'how do top teams do that?' into 'here's how I'll do that on our robot'.
the part worth keeping
Key takeaways
- Open Alliance teams publicly share CAD, code, and build threads, the fastest way to learn elite mechanical and controls techniques.
- Study real mechanisms (6328 A-frame pivot, 1678 shooter, 2910 dead-axle pivot) for load paths, serviceability, and control strategy, not just final geometry.
- Adapt, don't copy: read the build-thread iterations and code, then re-derive the design for your own motors, weight budget, and game.
Mechanical, Build & PneumaticsAdvanced Techniques & Case Studieslesson 5 of 5
That is the end of this track
Take the quiz+10 XP with an accountwhere this came from
Sources and corrections
This lesson is AI-assisted: drafted from primary sources, then reviewed and edited by hand. Errors still get through. When one is reported we fix it and write down what changed, in public, in the corrections log.
sources and further reading
- chiefdelphi.comFRC 6328 Mechanical Advantage 2026 Build Thread (Open Alliance)
- github.comFRC Team 6328 GitHub (code + AdvantageKit)
- frcdesign.orgFRCDesign In-Depth Mechanism Writeups
- chiefdelphi.comChief Delphi (FRC community forum)
clipped to this lesson
Articles that go further on this
The lesson gets you through the topic. These go wider on it, and they read in one sitting.
- 17 min readFRC Flywheel Shooter Design: Compression, Speed, Backspin, and HoodingHow to design an FRC flywheel shooter: exit velocity, compression, flywheel inertia and RPM recovery, single vs dual wheels, backspin, hooding, motors, and tuning./blogread it
- 16 min readFRC Elevator and Arm Design: Staging, Rigging, Motors, Gravity, and SafetyA primary-source FRC guide to designing elevators and arms: cascade vs continuous rigging, staging, motor and gear-ratio sizing, gravity math, and safe holding./blogread it
- 15 min readHow to Design an FRC Intake: Rollers, Compression, and MotorsA primary-source FRC intake design guide: over-the-bumper vs under-bumper, roller vs wheel, compliance and durometer, compression and wrap, and motor selection./blogread it
answer sheet
Lesson quiz
All 3 right completes the lesson. Miss one and only that question comes back, anything you already answered correctly stays banked.
0 of 3 answered
01What is the core practice that defines an FRC Open Alliance team?
02What is the main benefit to YOUR team of studying open-source robots from other teams?
03When learning from an Open Alliance build thread, which is the most responsible way to use what you find?
Answer every question to submit.
All 47 lessons in Mechanical, Build & Pneumaticsopenclose
01 / prerequisites
02 / drivetrains
03 / power-transmission
04 / structure-materials-fasteners
05 / mechanisms-fabrication-assembly
06 / pneumatics-fundamentals
07 / pneumatic-components
08 / build-wire-program
09 / safety-rules-testing
10 / worked-examples-mini-projects
- Not read yet:Mini-Project 1: A Single-Jointed Arm From Math to Motion
- Not read yet:Mini-Project 2: A Two-Stage Cascade Elevator
- Not read yet:Mini-Project 3: A Velocity-Controlled Flywheel Shooter
- Not read yet:Mini-Project 4: A Pivoting Roller Intake
- Not read yet:Mini-Project 5: Integrating a COTS Swerve Module
11 / common-mistakes-troubleshooting
- Not read yet:Pneumatics Won't Fire: A Full Diagnostic Tree
- Not read yet:The Robot Won't Drive Straight (and Other Drivetrain Sins)
- Not read yet:Gearboxes That Grenade and Fasteners That Vibrate Loose
- Not read yet:Closed-Loop Mechanisms That Oscillate, Sag, or Stall
- Not read yet:Field-Ready Reliability: Inspection, Spares, and the Pit Checklist
12 / advanced-techniques-case-studies
- Not read yet:Characterizing Any Mechanism with SysId
- Not read yet:Simulation-Driven Design with WPILib Physics Models
- Not read yet:Motion Profiling and Superstructure Coordination
- Not read yet:Designing for Weight, Stiffness, and Manufacturability
- Not read yet:Case Studies: Learning From Open Alliance Robots