## GD&T TRAINING

- Dimensions and Drawings
- Datum & Datum System
- GD&T Rules
- Flatness: Interpret the flatness control.
- Straightness:Interpret the straightness control.
- Circularity: Interpret the circularity control.
- Cylindricity: Interpret the cylindricity control.
- GD&T Concepts & Modifiers.
- (LMC), Regardless of Feature Size, worst-case boundary, virtual condition, and bonus tolerance.
- Size Datum: Interpret feature of size datum specifications at RFS & MMC.
- Position – RFS/MMC/LMC: Interpret RFS, MMC and LMC tolerance of position applications.
- Orientation Controls: Understand the basics of orientation controls.
- Perpendicularity: Interpret the perpendicularity control.
- Angularity: Interpret the angularity control.
- Parallelism: Interpret the parallelism control.
- Special Applications – Composite Tolerances
- Concentricity: Interpret the concentricity control
- Symmetry: Interpret the symmetry control.
- Circular Runout: Interpret the circular runout control.
- Total Runout: Interpret the total runout control.
- Introduction to Profile: Understand profile tolerancing.
- Profile of a Surface: Interpret the profile of a surface control.
- Profile of a Line: Interpret the profile of a line control.

## 3D Coordinate Measuring Machine

**Units**

SI Units, inch, Angles-Degrees & Decimal Degrees.

**2-D Coordinate Systems**

(Mathematical) Drawing Plane, Origin, Cartesian Coordinates, Polar Coordinates.

**3-D Coordinate Systems**

Cartesian Coordinate System in Space, Right-Hand Rule, Translation and Rotation, Cylindrical and Spherical Coordinate System

**Structure of Coordinate Measuring Machines**

Axis Guide, Stylus System, Stylus, Measuring Computer and Measuring Software, Work Holding Fixture, Additional Equipment (Rotary Table, Stylus System Changer, Articulating Stylus System)

**Types of Coordinate Measuring Machines**

Cantilever/Bridge/Column/Gantry Types, Differences in the Types

**Geometric elements**

Standard form elements: Point/ Line/ Plane/ Circle/ Sphere/ Cylinder/ Cone/ Torus, Vector, Normal Vector, Minimum Number of Points, Projection

**Geometric constructions**

Distance / Angle / Intersection / Symmetry of Geometric Elements.

**Evaluation**

Evaluation Criteria: Function-Oriented Evaluation Methods, Differences in the Evaluation Methods (Gauss, Envelope, Minimum & maximum Requirement).

**Geometric Dimension & Tolerance**

Standards, Symbols and Drawing Entries, Length Dimensions, Angular Dimensions, Limiting Dimensions, MMC/LMC, Form Tolerances, Location Tolerances, Orientation Tolerances, Composite Tolerances, Profile Tolerances.

**Preparing a Measurement on the Coordinate Measuring Machine**

Standardized Temperature, Part Cleaning, Temperature Control, Fixturing, (Avoiding Distortion), Featuring Systems.

**Measuring Strategy**

Define Clamping Setups and References (Practical Instructions), Order of Reference and Origin Selection, Measuring Element.

**Machine Start up**

Cleaning, Power ON, Software start up, Homing, warming up.

**Stylus Selection and Qualification**

Stylus System Selection, Stylus Qualification, Reference Sphere, Reference Stylus, Stylus Sphere Radius Correction, Stylus Tip Bending Correction, Errors of Incorrect Qualification.

**Measuring on the Coordinate Measuring Machine**

Determining part Coordinate System.

**Probing Strategy**

Number and Distribution of Probing Points, Probing Force and Speed, incl. Material Properties, Stylus Diameter, Special Styli, Scanning

**CNC Programming**

Teach-In Programs, Execution of programs, Consequences of Collisions, Editing of the programs.

**Documentation**

Measurement Reports, Graphic Evaluation, Form Plots, Measurement Reports and Their Improvement

## Practical on CMM

**Basic Knowledge – CAD**

Principles and Tools of CAD Design, Model Types, CAD Data Dimensions, CAD Formats, Import of CAD Data, Interfaces

**CNC Programming**

Offline Programming, Measuring against CAD Data, Geometric Alignment, Best-Fit alignment, RPS alignment, Three point alignment, Surface Point, Border Points.

**Basic Knowledge – Reverse Engineering**

Area Digitizing; Curves, Output Formats

**Creation of Measurement Programs**

Precision-Optimized Measuring Sequence, Time-Optimized Measuring Sequence, Travel Path Optimization, Feature-Oriented Measuring, Remote Programming, Safety Points and Planes, Program Loops / Branches/ Modules, Macros, User Interfaces, Program Optimization Loops, If/Then Conditions, DMIS Standard

**Good Measurement Practice**

Measuring Creates Added Value, Good Measurement Practice, Necessity of Cooperation

**Effects on the Measurement Result**

Effects on the Measurement Result, Reduction of Measurement Uncertainty, Detection and Reduction of Systematic and Random Effects, Temperature Compensation

**Precision**

Accuracy of Coordinate Measuring Machines, CAA Correction, Manufacturing Methods and Accuracies.

**Basic Knowledge – Test Equipment Monitoring**

Test Equipment Monitoring, incl. Monitoring Strategies, Test Specimen, Monitoring and Acceptance Test of Coordinate Measuring Machines