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Module 2 — Concepts & Trade Studies

Objective: generate and screen concepts quickly with data.

Prereqs: Module 1 field map.

Steps

  • Brainstorm 3–5 mechanisms per task; sketch reach, stroke, path.
  • Run quick calcs: torque/speed, CG shifts, weight, packaging.
  • Compare COTS vs custom; note lead times and risks.
  • Check intake/shooter paths for compression and centering; consider ball/cone material and field carpet interaction.
  • Identify required sensors (beam breaks, limit switches, IMU) and their mounting space.

Instructions (numbered)

  1. Brainstorm individually, then converge as a group; sketch 3–5 options per task.
  2. For each concept, estimate torque/speed, CG impact, weight, and footprint.
  3. Compare COTS vs custom (lead time, cost, reliability); flag risks.
  4. Evaluate game-piece interaction: compression, centering, surface friction.
  5. List required sensors and rough mounting locations.
  6. Rank concepts and select for prototyping; create keep/kill list.

Example

  • Intake concept A: 2-roller, 1.25 in compression, 4 in wheels, NEO 550, 3:1 ratio; risk: jams on cones.

Best practices

  • Use quick math (gear ratio, surface speed) before building.
  • Bias toward COTS-first to accelerate iteration.
  • Plan sensor mounts early to avoid last-minute hacks.

Common mistakes

  • Overlooking CG and packaging; choosing unreachable geometries.
  • Ignoring lead times for critical parts.
  • Forgetting game-piece variability (wear, deformation).

Checklist

  • 3–5 concepts sketched per task
  • Torque/speed and weight estimates
  • COTS vs custom comparison
  • Sensor list and mount ideas
  • Keep/kill list with reasons

Recommended tools

  • Whiteboard/sketch tools, calculator, vendor catalogs (REV/WCP/AndyMark), simple spreadsheet for calcs.

Sample log (template)

  • Date:
  • Concepts considered:
  • Calcs summary:
  • Risks:
  • Decisions:

Photos/diagrams

  • [Placeholder: sketches of top concepts with annotations]

Deliverables

  • Shortlist with pros/cons, rough calcs, and risks.
  • Keep/kill list for prototypes.
  • Initial test plan (what to prototype first, success criteria).

Resources

  • Open Alliance inspiration: chiefdelphi.com/c/open-alliance/79