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To ensure consistency across mechanical team projects, please read over this page and follow the practices when you are working with the mechanical team!

1. Coordinate Convention

FOR HIGH-LEVEL ASSEMBLIES OR PARTS DIRECTLY RELATED TO LOCATIONS IN THE OCCUPANT SPACE:

  • USE THE DEFAULT SOLIDWORKS COORDINATE CONVENTION

  • THE ORIGIN IS PLACED ON THE FLOOR WHERE THE CENTER AXIS INTERSECTS THE FRONT PLANE OF THE CAR

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titleWhat counts as a high level assembly?

A high-level assembly means that the assembly’s position ultimately determines the position of many related subsystems of the car.

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  • The origin of the car is placed on the floor where the centre axis intersects the absolute front of the car

  • Use the Default Solidworks Coordinate Conventions

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This means

  • Origin on the floor, intersecting the centre axis at the front plane of the vehicle (circled below in the occupant space definition diagram)

  • positive z-axis pointing to the front of the car

  • positive y-axis pointing to the top of the car

  • positive x-axis pointing to the left of the car

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Please abide by the mentioned coordinate system for assemblyor parts that use the entire vehicle as a datum (the position is directly related to the origin mentioned above)

Of course, for parts that are not directly related to positions inside the occupant space - the origin does not have to be positioned as mentioned above.

  • ex. The steering wheel does not have to follow the origin since it is not directly related to the position in the car

    • It is related to the position of the stalk → the rack and pinion → the overall dynamics high-level assembly (which is eventually related to the position in the car)

  • If you are unsure/need clarification - ask a lead to confirm!

If your design is symmetric on both halves of the car - design on the “left” side of the car (where x is positive). Keeping more things consistent across teams is always beneficial.

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2. Design Units

  • Design the car in metric, the only exception being critical and fasteners in imperial. Normal Some fasteners can be metric or imperial, but consult your team lead and keep it consistent.if the elec-team requires or due to stock availability; consult team lead for exceptions

Follow standardized units to maintain consistency between components. Design in Metric due to alignment with ASC regulations and ease for force loading of calculations in Newtons. Critical Fasteners in Imperial due to Imperials because of significantly better availability (ex. low profile flex locs) and price in McMaster-Carr for critical fasteners.

Critical Fasteners: Fasteners for critical areas, which is defined to include: steering, braking, suspension, seat mounts, safety harness, drive train, battery box, ballast carrier, and parking brake.

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3. Hole Wizard

  • Use Hole Wizard when placing holes in your components.

Using hole wizard is an efficient way to place holes in your parts while making sure that hole sizes remain consistent across the whole team.

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4. Design Library and Templates

  • All mechanical components (ex. fasteners, nuts, washers) models should be taken from McMaster-Carr, NOT the Solidworks design library.

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titleDownloading parts from McMaster-Carr

MMC basically has all the mechanical components you need for your design - once you find the appropriate component, click on the part number, and select 3-D Solidworks to download the CAD file for your component.

image-20241003-045946.png

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5. Bild PDM (Project Data Management)

Bild PDM Resources

  • Review the link above on how to use Bild as our PDM system to store all our CAD

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Do not make changes to the top-level assembly of each subteam unless instructed!

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5.5. If you actually have to send CAD assemblies instead of uploading to Bild …

Pack and Go it!

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6. Master Bill of Materials (BOM)

  • Please add new parts in the Master BOM, and follow the naming convention mentioned in the document when creating new parts

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if you do not have access to the Google Drive - message a lead!

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7. Jira: Project Management

  • Track project progress in Jira for clarity across mechanical teams and task accountability

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