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CATIA V5 Common Knowledge Tools

Robert M. GarrisonSenior Applications Engineer

Presented to:CATIA Operators of Puget Sound

21 June 2006

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Roots of Common Knowledge

What is Knowledgeware in the context of CATIA V5?Specific workbenches that are configuration-dependent

• Knowledge Advisor (concerned with Parameters & Relations)• Knowledge Expert (concerned with Types and Attributes)• Product Knowledge Template (concerned with Smart Templates)• Product Engineering Optimizer• Business Process Knowledge Template• Product Function Description• Product Function Optimizer

Specific tools independent of workbenches• Common Knowledge Tools

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Roots of Common Knowledge

Uncommon KnowledgeHow geometry creation methods influence the application of knowledge (a tale of three pads)

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Roots of Common Knowledge

Uncommon KnowledgeHow change cascades through the Parent / Child relationship

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Roots of Common Knowledge

Uncommon KnowledgeThe overlooked parametric connection

Parametric Relationship

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Roots of Common Knowledge

Uncommon KnowledgeThe overlooked parametric connection

Renaming Parameters

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Roots of Common Knowledge

Uncommon KnowledgeThe overlooked parametric connection

Multiple vs. Single Value Parameters

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Roots of Common Knowledge

Uncommon KnowledgeThe overlooked parametric connection

Locking Parameters

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Roots of Common Knowledge

The Enlightened PathGeometric Behavior

• Take the minimalist approach to geometry• Reduce resultant geometry to fewest inputs possible for the

behavior you desire• Consider the types of changes parts will undergo downstream• Create a part that is predicatively reactive

Parametric Relationships• Devise clean schemas – avoid multi-branching cascades• Understand the purpose of each relationship tool and apply it

towards its strength

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Parameters in CATIA

Parameters by default are primarily staticOnce engaged in relationships, Parameters become dynamicParameters come in two flavors

Intrinsic Parameters• Created by CATIA as a byproduct of geometry creation• Cannot be deleted without deleting the associated geometry• Can be engaged in relationships

Extrinsic Parameters• Also known as User Parameters• Created by user independent of geometry creation• Can be engaged in relationships with Intrinsic or other Extrinsic

Parameters

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Intrinsic Parameters

Parameters created by CATIA

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Intrinsic Parameters

Parameters created by CATIA

Dimensional & Geometric Constraints are also

Parameters

*Filter on the Sketch

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Intrinsic Parameters

Parameters created by CATIA

Limit and Offset Values are also parameters

*Filter on the Pad

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Intrinsic Parameters

Parameters created by CATIA

Sketch-Based Features create Parameters from the Sketch and on the Feature

*Filter on the Hole

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Intrinsic Parameters

Parameters created by CATIA

Non-Sketch Features also have Parameters to Consider

*Filter on the Plane

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Intrinsic Parameters

Parameters created by CATIA

Product Properties are also Parameters

*Filter on the Part

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Extrinsic Parameters

Parameters created by Users

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Renaming Parameters

Intrinsic & Extrinsic Parameters can be renamedThis is not the same as renaming a FeatureRenaming Parameters makes them easier to find through filtering when building RelationshipsRenaming is typically done through the Edit Parameter dialogue box

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Renaming Parameters

Renamed Intrinsic Parameters do not appear in the Specification Tree.Only Extrinsic Parameters are in the Specification Tree

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Renaming Parameters

All Renamed Parameters can be Filtered through Knowledge Dictionaries

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Relationships in CATIA

Relationships make Parameters dynamicFundamental Relationships

FormulasEquivalent Dimensions Tables (Length or Angle)Design Tables

Advanced RelationshipsLaws (Generative Shape Design)Advisor Rules & ChecksSets of EquationsActions & ReactionsExpert Rules & Checks

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Formulas

Formulas are Relationships between ParametersOne or more parameters drive another – the driving parameters are referred to as the ArgumentsOne-to-One relationships are typically not created using a Formula – use Equivalent Dimensions insteadAll Formulas appear in the Relations branch of the Specification Tree – they can be hidden

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Formulas

User Parameters can be used as an argument in a Formula that drives an Intrinsic Parameter

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Formulas

Formulas can use Dictionary-driven Measures

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Formulas

Proper construction of a Formula allows Parameters of one type to be used as arguments to drive a Parameter of a different type (e.g. Length = Real)

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Formulas

Multiple Value Parameter of Type Real driving a Length Parameter

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Formulas

Using a Formula to drive Geometry Types

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Equivalent Dimensions

Equivalent Dimensions hold Parameters of the same type in a Table

Can be Length or Angle types onlyEach Parameter in the Table acts as an ArgumentEach Parameter in the Table are also DrivenRelationships are one-to-one (i.e. a = b)

The Equivalent Dimension Relationship also has its own Parameter

This Parameter can be used as an Argument in other RelationshipsThis Parameter can be driven by other Relationships

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Equivalent Dimensions

Creating an Equivalent Dimensions Table

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Equivalent Dimensions

Creating an Equivalent Dimensions Table

Parameter can be Multiple Value

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Equivalent Dimensions

Creating an Equivalent Dimensions Table

Parameter can be engaged in Formulas

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Design Tables

Design Tables are Relationships between Parameters...

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Design Tables

...and Tabular Data (Delimited Text Files or Spreadsheets)

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Design Tables

Design Tables can be used to trigger simultaneous value changes to multiple Parameters...

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Design Tables

...providing quick global change capability

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Thank you for your attention...

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