1E: Subsystem Workflow - Detailing the Drivebase

Exercise: Bellypan Pocketing

Some teams may choose to pocket their bellypan to reduce weight and make wiring easier. A pocketed bellypan can save around 3-4 lbs. However, this will add significant machining time if you are manufacturing the bellypan yourself or increase cost if you are purchasing the bellypan from a fabrication service (eg: Fabworks). You should carefully consider the tradeoffs with your team.

Instructions

If you choose to pocket your bellypan for your drivetrain, you can follow the instructions in the slides which utilize the Vent Featurescripts. You could also use the Lighten, or Part Lighten Featurescripts to pocket the bellypan. While the workflow may vary slightly between each Featurescript, the general idea is the same. A diamond pattern is recommended for strength and ease of modeling.

1. Draw two perpendicular lines that are offset 45 degrees from vertical.

2. Linear pattern the lines until they completely cover the bellypan. These will be the ribs for the bellypan.

3. Offset the outline of the bellypan 0.5”.

4. Connect any islands that might result from mounting holes being too far from a rib. One way to fix this is to add a slot connecting the island to a rib.

5. Use a pocketing Featurescript to pocket the bellypan. Recommended settings are 0.15” wide ribs and 3/16” tool radius.