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NX 6 Design Freedom with Synchronous Technology. Benefits of History Based Systems. Traditionally used for: Families of Parts Design Automation Highly Engineered Template Driven Promotes best practices and standards Design process knowledge captured in history Features Relationships

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benefits of history based systems
Benefits of History Based Systems

Traditionally used for:

Families of Parts

Design Automation

Highly Engineered

Template Driven

Promotes best practices and standards

Design process knowledge captured in history




Inputs you edit

  • Diameter, D


  • All holes update

Trivial example

Inputs you edit

  • Air flow volume
  • Number of stages
  • RPM


  • Compressor design

Design rules are:

  • Highly complex & proprietary
  • Exactly the type of information you do not want to share with other companies ?

Will Continue to be an important

Approach for Product Development

Complex example: jet engine

challenges of history based systems
Challenges of History Based Systems

Parametric CAD model

Simple re-use of CAD models

“I don’t know how this model works.”

“I need to make a one-off change to a model from an OEM”

Where we get stuck…

“I made this last year, and I don’t remember how it works.”

“The designer who made this retired last month.”


“It will take me longer to figure out than it will take me to recreate it.”

“I think I’ve found a good model… Now what do I do with it?”

benefits of synchronous mode
Benefits of Synchronous Mode

Performs best for “Unplanned Change”

Design knowledge is added to the model

Extremely easy to use

Increased capacity for “what if” design studies

  • Edit B-rep data received from another CAD system
    • JT, STEP, IGES, CATIA, SolidWorks, Pro/E, etc…
  • One time change or What-if Design
  • History tree difficult to understand
    • Modifying parametric design is costly
    • Translation is not viable

NX provides tools to add intelligence to the model.…

design freedom the best of both worlds
Design Freedom – The Best of Both Worlds


  • Design Freedom spans both environments
  • Feature creation
  • Feature editing
  • Direct Modeling
  • Functional feature recognition
  • Geometric relationships recognition
  • Accelerated design creation
  • Design reuse
  • Working with imported data including JT

Improved History Based

  • Design intent
  • Automation
  • Top down system design
  • Change propagation

New History Free

  • Local features
  • Local feature update
  • No history replay

Design Freedom




Synchronous Modeling



Synchronous Technology:

Synchronous Technology represents a way to interact much more efficiently and intuitively with models—without being confined to the way models were originally constructed.

This new approach to modeling instantaneously synchronizes engineering relationships, features, and parameters through a more direct interaction paradigm. The result is a design methodology without limitations.

Design Freedom:

Design Freedom is a set of new modeling technologies in NX focused on increasing your productivity by eliminating CAD system overhead.

Design Freedom enables you to focus on designs instead of the CAD system.

Design Freedom is powered by Synchronous Technology, a new modeling engine developed by Siemens PLM Software.

  • History Mode: (aka Parametric Modeling)
    • History Mode is a design mode that builds and replays a global feature tree. This design mode is optimal for designing highly engineered parts that undergo complex changes that can be planned for during design creation. In history mode synchronous modeling operations are recorded as features in the history tree and are replayed along with the tree.
  • Synchronous Mode: (aka History-Free mode)
    • Synchronous Mode is a design mode that builds local features and dimensions, but does not replay a global feature tree. This design mode is optimal for parts that undergo rapid changes that cannot be planned for during design creation. In history-free mode synchronous modeling operations are created as local features, persistent dimensions, and constraints.

Synchronous Modeling: (aka DMX, ADM, or Direct Modeling)

  • Synchronous modeling is an approach for design change with emphasis on modifying the current state of a model without regard for how the model was constructed, its origins, associativity, or feature history. The model could be imported, non-associative, with no features, or a native NX model complete with feature history.
market landscape approaches
Market Landscape – Approaches

Families / Design Automation / Highly Engineered / Template Driven

History Mode

Lightweight Designs / Small Changes / Short Lifecycle / One-off/ Manufacturing

Synchronous Mode

design freedom functional overview
Face Selection

Face Finder (Geometric)

Coaxial, Tangent, Coplanar, Eq. Radius, Symmetric

“Near” vs. “Far”

Feature Finder (Topologic)

Single, Region, Tangent, Adjacent, Feature, Rib, Slot, Boss or Pocket

Adjacent Blends

Merged Rib Faces

Suggestive Selection

Core Commands

Move, Pull, Offset, Replace, Resize Blend/Face, Delete, Local Scale

Reuse Commands

Copy, Cut, Paste, Mirror, Pattern

Group (for Feature Recognition)

Design Freedom – Functional Overview
  • Geometric Commands
    • Coplanar, Coaxial, Tangent, Symmetric, Parallel, Perpendicular
  • Dimension
    • Linear, Angular, Radial
      • (May be Driving or Driven)
  • Synchronous Mode Commands
    • Shell
      • Shell Body, Shell Face, Modify
    • Edit by Cross Section
  • Synchronous Features
    • Hole, Thread, Blend, Chamfer
  • Motion Options
    • Distance - Angle
      • “OrientXpress”
    • Distance Between Points, Point to Point, Radial Dist., Align Axis to Vector, Rotate by 3 Points, CSYS to CSYS
face selection
Face Selection

Face Recognition

Feature Recognition

Region Recognition

Suggestive Selection

face recognition
Face Recognition


Recursive coaxial

Find equal diameter

Find coaxial

Click face

Recognize geometric conditions without regard for how the model was constructed

Face Finder – Coaxial, Tangent, Coplanar, Equal Radius, Symmetric

face recognition12
Face Recognition





Maintain tangent conditions without regard for how the model was constructed

face recognition near vs far
Face Recognition: Near vs. Far

Search 2300



Geometry index for fast find

Distinguish near from far to alleviate over-select

feature recognition
Feature Recognition




Selection of topology without regard for how the model was constructed

Boss or Pocket, Slot, Rib

feature recognition15
Feature Recognition



Option to include neighbor blends

feature recognition16
Feature Recognition

Merged Rib Faces (very common condition)

Available in Synchronous Mode

region recognition
Region Recognition





Select a region face

Combination of faces and curves

No requirement to trim curves or subdivide faces

(Coming Soon!)

suggestive selection
Suggestive Selection

Additional selection methods offered directly under cursor

Both Face and Feature recognition

No need to plan ahead

Able to change methods iteratively to arrive at best selection

Uses Office 2007 mini-bar concept

reuse commands
Reuse Commands

Reuse of FACES

Copy Face: copy face set (scrap) for reuse

  • Optional Move and Paste immediately

Cut Face: copy, delete from body, and heal

Paste Face: attach scrap to body

  • Extensions of faces based on “add” or “subtract” attributes

Mirror Face: combination of copy and paste

Pattern Face: rectangular or circular array

geometric commands
Geometric Commands

Applies geometric conditions to geometry

Make Coaxial

Make Coplanar

Make Tangent

Make Parallel

Make Perpendicular

Make Symmetric

  • Choice of Symmetry Plane(s)

Add dimension

Edit value

Applies a dimension to the model




Edit Dimension to Move Geometry

Move Geometry to Change Dimension

synchronous commands
Synchronous Commands

A mode of working with NX where linear history does not accumulate

      • No replay
      • No Edit with Rollback
      • Extrude just adds a body
      • Blend just modifies a body
      • A curve is just a curve
  • Shell
  • Cross Section Edit
adaptive shell
Adaptive Shell

Shell behavior without a shell feature

Walls are maintained during DMX commands

  • Move Face, Offset Region, Make Coplanar, etc

Explicit command set

      • Shell Body: performs the initial shell
      • Shell Face: adds faces to an existing shell
      • Change Shell Thickness
cross section edit
Cross Section Edit

Intersect model with any plane

  • Intersection curves displayed in the Sketcher task

Edit curves to change the model

  • Drag, Dimension, Constrain

Exclusive to synchronous mode

synchronous features
Synchronous Features

History Free … Not Feature Free

History-free does not mean feature-free

Synchronous features are recorded and editable:

  • Hole
  • Thread
  • Edge Blend
  • Chamfer

Feature behavior is desirable even in absence of history

  • Edit properties via dialog – “edit like create”
  • Change location via direct modeling
common interface blocks
Common Interface Blocks

Face Finder block

Motion Block


Face Finder block

Suggestive selection service

Motion block

OrientXpress block

motion block
Motion block

Radial Distance

Dimensional and geometric transforms


Set axis or plane via scene control

Heads-up interaction avoids visiting the dialog

Choice of Reference coordinate system

  • Absolute, WCS, CSYS object
  • Work part or displayed part

Service for reuse in commands or blocks

  • Linear Dimension command, Motion block
synchronous modeling summary
Synchronous Modeling: Summary

This is the revolution in CAD technology!!

Provides an intuitive and direct approach to design … it is simple, fast, and reliable.

NX 6 Builds on the strengths of NX 5 in Highly Engineered models

  • Design Freedom is even more powerful

Adds a new History-Free mode

  • Market leading functionality
  • Increased capacity for “what if” design studies

Super Easy CAD – minimal learning curve

Best of both worlds in one Package

  • Frees you from the limitations of traditional history based modelers
  • Works equally well on imported parts
  • Preserves your investment in history based modeling
  • Powerful tool for CAE and Manufacturing Engineers
  • Users choose best approach to get the job done
frequently asked questions
Frequently asked Questions

Is this an additional module?

No, this is a core part of NX Modeling There is no additional license for this functionality

Can this be used with applications such as MoldWizard?

Yes, we see the direct tools working very well as part preparation tools for manufacturing

Does this work with Product Template Studio?

If a customer is developing a template part they will have more control if they use parametric history

However, if a customer imports data and adds dimensional edits the expressions created can be accessed by PTS making the imported part a template

Are we forcing our customers to learn a new approach?

No, with NX we are continuing to develop the best of both worlds we see customers where parametric modeling is a key part of their process, we also see customers who do not worry about history, NX delivers best of both approaches

frequently asked questions31
Frequently asked Questions

Can this work with JT data?

It relies on a solid model, if the JT data contains XT B-Rep this will be edited.

Is this a separate file type?


Do my customers have to translate their data?

If your customer has models that they are already using there is no need to make them history free unless they really want to.

If they want to get the power of the editing offered by Design Freedom they can and that is using the power of synchronous technology

thank you

Thank you

Thank You