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Stop the Datum Confusion! - Video!

Consider the Translation Modifier - Video!

Determine the Origin of Measurement - Video!

Datum Targets - Video!

Datums Are Mutually Perpendicular

Referencing the Datum

Datum Feature Control

Primary Datum Surface Control - 1994, 2009 & 2018

Tie your datum features together - 1994

Keep Datum Features Simple

Keep Identification of Datum Features Simple

Control Your Datum Features

General Profile Tolerance

Tie your datum features together - 2009 & 2018

Datum Feature Selection

Datums Based Upon Function

Slot as Primary Datum Feature

A Hole’s Primary Datum Feature - Video!

Two Holes

Two Holes as Datum Features - Horizontal - Video!

Two Holes as Datum Features - Diagonal - Video!

Datum Feature Types

Primary

Planar Datum Features - Video!

Center Planes as Datum Features - Video!

Spheres as Datum Features - Video!

Cones as Datum Features - Video!

Linear Extrusion - Video!

A Complex Feature as a Datum Feature May Constrain - Video!

Hole and Slot as Datum Features - Part I - Video!

Hole and Slot as Datum Features - Part II - 2009 - Video!

Secondary

Watch the Placement of Datum Identification Symbols... 1994 & 2018

Watch the Placement of Datum Identification Symbols... 2009

Datum Features

Repetitive Patterns

Datum Features Must Be Referenced - Video!

Axis vs. Center Line - Video!

A Datum Feature Is Not a Datum - Video!

Datum Reference Frame

Oblique Angle

Don’t Complicate Control of Your Datum Features

Does a Datum Reference Frame Need to be Fully Constrained - 1994, 2009, 2018

Displacement (Shift)

Tolerances Do Not Change

It Is Datum Shift - Not Bonus - Video!

Geometry Effect - Video!

Stop Using Datum Shift as a Bonus! - Video!

Why Datum Shift Is NOT a Bonus - Video!

Datum features can give you a shift-not a bonus - 1994

Datum features can give you a shift-not a bonus - 2009, 2018

Exact Constraint

Avoid Over Constraint in Your Designs

Rocking Datum Feature - Video!

Orienting Datum Planes

Tertiary Datum Feature

Orienting Datum Planes - Video!

Sufficient Size

Datum Features Must Be of Sufficient Size - Video!

Datums must be of sufficient size - 1994, 2009, 2018

Symbol Placement

Watch placement of datum triangles in the latest Standard - 1994, 2009, 2018

Watch where you put that triangle - 1994, 2009, 2018

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