Advanced GD&T Competencies: Datum Usage

While the basics of datums are covered in a standard Geometric Dimensioning & Tolerancing (GD&T) course, those discussions often overlook the variations that enable datums to be used in complex ways. This advanced course will detail the proper use of datums, showing their full potential to make your drawings as effective as possible. Most people who use GD&T are familiar with traditional datums derived from flat surfaces, and have adequate knowledge of the principle of establishing 3-2-1 contact points. In this web seminar, participants will learn to select, identify, simulate, and describe datums and datum features for special uses such as irregular shapes, flexible parts, and datum references that use the maximum material modifier. Also covered are several new modifiers and options given in the ASME Y14.5-2009 standard. Learning these advanced techniques will allow designers to better communicate certain requirements.

What Will You Learn

By participating in this web seminar, you will be able to:
  • Explain the difference between a datum and a datum feature
  • Select appropriate datums for irregularly shaped parts such as body or interior panels
  • Properly simulate given datums
  • Explain effects of a modified datum on a geometric tolerance
  • Interpret new datum tools such as translation and custom degrees of freedom

Is This Course For You

This advanced-level course is intended for designers, product engineers, manufacturing engineers, manufacturing personnel, and quality/gaging inspectors with a basic knowledge of GD&T concepts. It is a companion to the  WB1320- Advanced GD&T Competencies: Profile of a Surface and WB1321 - Composite Positioning web seminars.

Materials Provided

This data is not available at this time

Course Requirements

*Global toll-free telephone numbers are provided for many countries outside the U.S., but are limited to those on the WebEx call-in toll-free number list. Check here to see if your country has a global call-in toll free telephone number for this web seminar. If your country is not listed, you may still connect using the US/Canada Call-in toll number or Voice over Internet Protocol (VoIP).

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Topics

  • Brief review of traditional datum usage
  • Selecting datums: surface vs. feature of size
  • Use of the MMB modifier (formerly MMC)
  • Using a pattern as a single datum
  • The new translation modifier
  • Applying the "M" modifier to a surface
  • Customized degrees of freedom
  • Irregular feature of size datums
  • Moveable datum targets