Brandon Tashi

Ongoing list of notes for learning:

When dimensioning CAD drawings using GD&T, the basic dimensions should always start from a datum and, if necessary, form a chain.

Datums should lock all degrees of freedom. Primary datum should ideally lock a minimum of 3 degrees of freedom. Secondary datums lock at minimum 2 degrees of freedom, and the tertiary datum locks a minimum of 1 degree of freedom.

Datum features should be chosen according to the function, such as any mating or mounting areas. In the CUUBA drawing, GD&T callouts will and should be removed eventually.

Might consider moving to MBD (model-based definition) drawing for GD&T. CAD software could perform tolerance stack-up for things like positional or total run-out callouts more easily.

Drawings are over-constrained and have unnecessary dimensions. I will update drawings to clean up dimensioning and incorrect GD&T callouts. The title blocks should also be updated as well, with notes like "break all sharp edges and remove all burrs".

Assembly drawings on this page should be updated with "(###)" for reference dimensions.