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Onshape

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All design (sketches, parts, assemblies) shall be conducted using Onshape.

All Documents shall be visible to the team at all times.

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Master Document

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A Master Document shall be created to contain Master Sketches and subsystem assemblies.

This document allows the Lead Designer to have central control of the overall robot design, packaging, and Critical Geometry.

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Master Sketches

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Master Sketches define the key geometric features, dimensions, and relationships for a design. In a top-down design workflow, they act as the blueprint for the entire robot, ensuring that all components align and integrate properly.

Master Sketches should be made to define:

• Field Elements, Game Elements, Robot Limits
• Chassis (frame, wheels, bumper)
• Manipulator skeletons (joints, arm lengths, lifts and slides)
• Major electrical components (battery, power distribution hub, Rio)
• Any other Critical Geometry which is required in order for the robot to function properly

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Reference Geometry and Context Editing

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• All major subsystems shall reference at least one Master Sketch. No part of the robot exists in Isolation.

  New parts can reference existing parts by using Assembly Context or by Deriving existing parts or sketches into the new Part Studio

  Mating points, rotation points, lengths, swings, limits, and basic volumes should all have been worked out in the Master Sketches. These geometric features should be used as parametric references in subassemblies so that changes to the Master Sketch will result in rational (non-breaking) changes in subassemblies and parts.

• Most Parts will usually reference at least one other part, though the Designer must decide when this is appropriate and useful.

  Many sketch entities will require typed dimensions, but designers should strive to constrain relevant sketch elements to existing parts or sketches that would affect the design of the part they are working on.

  Some examples of when references should be made:

  • An existing part is the attachment point for the new part
  • An existing part interacts or touches the new part
  • The new part must keep a certain distance from an existing part
  • Features on a new part must line up with an existing part
  • Features on a new part must match features on an existing part