The question this weekend.
Do you know the basic dimension?
A basic dimension in mechanical drawings, specifically in GD&T, defines the theoretically exact size, profile, orientation, or location of a feature.
Key characteristics include being theoretically exact, having no direct tolerance, being identified by a rectangular box around the numerical value, and sometimes being referred to as TEDs (Theoretically Exact Dimensions) in ISO standards.
Its primary purpose in GD&T is to serve as a reference framework for applying geometric tolerances.
Basic dimensions define the true position of features relative to datum features, precisely set the exact center of tolerance zones for geometric tolerances which are applied via a Feature Control Frame, and help avoid tolerance accumulation.
Essentially, they indicate where a feature should be, while the geometric tolerance dictates how much the feature's actual position can deviate from that ideal location.
The question this weekend is …
Given the assembly scheme on the left, if you apply the difference value of the basic dimensions from A to E, does it lead to the same interpretation of the datum reference frame, the tolerances, and the relationship among the five holes?
Building EGI (Engineering General Intelligence)
1moFull article here: https://www.foundationegi.com/media/automating-gd-t-drawings