Tolerance stackup is ok but assembly is NOT ok, why?

You will learn: 1. Incorrect part drawings will lead to incorrect tolerance Stack-up calculation 2. Using Linear Tolerance to specify the distance or Position will cause meaningless stack-up calculation 3. Properly definition of part datum and geometric tolerance is the foundation of stack-up calculation. Fluent application of profile and position tolerance is one of the key criteria of belonging to GD&T Experts. You know what I mean. Full Tolerance Stack-upTraining videos at Udemy: https://www.udemy.com/course/toleranc...