Creo Parametric

Tips and Tricks

Evan Winter

PTC

2

System

3

1. File > Options > System Colors > Graphics

2. Select Background and ensure “No Gradient” is checked.

3. Set color to black (or other color to be used in Sketcher).

4. Select Background again and un-check “No Gradient”

5. Select Background again and click More Gradients…

6. Set your desired Top and Bottom colors by selecting the

swatch icons.

Setting Pro/E style background colors

Blended backgrounds can still be used, and Sketcher can use a default black

background as in pre-Creo releases.

Blended Background in 3D

Default color (black) background in

Sketcher

4

• Favorites section in Options menu allows you to quickly change config.pro

settings. – Right click config options and “Add to Favorites”

• Color Schemes allow fast switching of system colors while maintaining

contrast. – File > Options > System Colors

• Cmdmgr_trail_output – provides explicit command instructions for Trail

files and mapkey creation. Set this to “yes” when defining Mapkeys for

simpler and more robust scripts. – Note on Mapkeys: Avoid using RMB shortcuts in Mapkeys as they are not consistently

repeatable. For example, use Operations > Edit Definition instead of RMB > Edit Definition.

Options Dialog

5

File > Options > Environment > Mapkeys Settings…

Creating Mapkeys

6

• Create a

Mapkey

• Modify an

existing Mapkey

• Run (Test) a

Mapkey

• Delete

• Save a single

mapkey

definition to file

Creating Mapkeys (Cont.)

• Enter key

sequence

• Assign a name

• Provide a

description

• Choose Record

Keyboard Input

• Start recording,

add Pause for

any user inputs

needed, Stop

recording.

7

Creating Mapkeys (Cont.)

File > Options > Quick Access Toolbar

This process should be repeated for each mode

where command should be available (Part,

Assembly, Drawing).

8

Access to Free Hardware CAD Models

The Creo embedded browser now includes a tab for 3DModelSpace.com, which is a

repository for standard hardware models in Creo Parametric format. Ensure that

“enable_3dmodelspace_browser_tab” is set to yes in config.pro

9

Part

10

Query Select to Intent

references, or use “Pick

from List” in RMB while

creating Rounds, Chamfers,

Draft, etc.

Using Intent References

You can increase the robustness of features using Intent References, which capture

the intent of the feature when selecting resulting edges or surfaces (the edges

bounding a surface of a feature, or a set of extruded vertices).

No failure

after base

feature

modification

11

1. Hold ALT and select the Seed surface.

2. Hold SHIFT and select the

first Boundary surface.

3. While holding SHIFT

continue selecting

Boundary surfaces (as

many as needed).

4. Release SHIFT

to complete the selection.

Leveraging Advanced Selection Methods

You can build more robust features using advanced Seed and Boundary selection.

1 2

3 4

12

Leveraging Advanced Selection Methods (Cont.)

Within a feature, use the Details dialog to manage advanced selections.

13

• Settings > Tree Columns – Type = Layer

– “Layer Names” and/or “Layer Status” > Add Column > OK

Showing Feature and Component Layers

You can show Layer Placement and Status for Part Features and Assy Components.

14

• Solidify with Datum Planes – Use the Solidify command to trim geometry

from one side of a model (e.g. flat cuts at spring ends, setting up “Mirrored”

simulation models).

Using Solidify To Trim Solid Geometry

15

• Pattern Regeneration options (General, Variable, Identical). – General is the default option. It is the most robust but also the slowest to regenerate. Only use

this option if pattern instances intersect each other.

– Variable is faster and works as long as instances are not intersecting each other. Patterns can

cross into other surfaces.

– Identical is the fastest to regenerate, but all pattern instances must fall on the same surface and

cannot intersect each other. Use this option whenever possible unless design changes are

expected. Note: Downstream Reference Patterns can fail if referencing Identical regenerated

patterns. Use Variable or General if patterns are failing for reasons otherwise not clear.

• Geometry Pattern – New Pattern command that allows you to pattern only the geometry created by features, not the

features themselves. Significantly faster to regenerate than normal feature patterns.

Improving Patterns

16

• Vertices can be used to gather Delta X, Y and Z measurements. – While measuring distance between vertices, add a CSYS feature to the Projection collector to

see the transform distances.

Getting Transform measurements using Vertices

17

• Activating Replace mode for second reference allows quicker repeated

dimensions. – Single-click on additional references will Replace tagged reference (Edge: F7) and update the

distance measurement from original reference (Surf: F6).

– Set measure_auto_replace_mode to Yes will flag second added reference as “Replace”

automatically.

Measuring Multiple Distances from a Single Reference

18

• Create a refined (machined) version of a Cast part using the Inheritance

feature. 1. First create the part as-cast (part_cast.prt)

2. Create a new part to represent the finished design (part_machined.prt) and insert a

Merge/Inheritance feature.

3. Browse to the cast part and place it using Default, then Toggle Inheritance in the Dashboard.

– Additional features can now be added to the new model to represent final machining operations.

The base geometry is dependent with the original cast part, and will update with design

iterations.

Creating Cast/Machined Parts

1 2 3

19

• Apply colors to a model that represent machining operations on a

previously Cast part. 1. In the machined model (an inheritance part from the previous slide), apply a color to the “part”

definition that represents the machined surfaces (select the part name in the Model Tree when

applying color).

2. Select a single surface, then RMB select Solid Surfaces. Pick a “cast” (matte) color from the

Appearance Gallery to apply the color to the “surface” definition of the part.

3. Add the final machining features (holes, chamfers, facing, milling, etc.) to “reveal” the

machined part color underneath the cast surface color.

Adding colors to Cast/Machined Parts

1 2 3

20

Assembly

21

• Set auto_constr_always_use_offset to Never – Coincident will be the default constraint type for the following reference pairs:

• Planes

• Linear edges / Datum Axis

• Planes combined with Linear edges

• Set auto_constr_always_use_offset to Yes – Offset (Angle or Normal) will be the default constraint type for the following reference pairs, never coincident:

• Planes

• Linear edges / Datum Axis

• Planes combined with Linear edges

• Set auto_constr_always_use_offset to No* – Creo will suggest a constraint type based on current component position and orientation

• Coincident

• Distance

• Angle

• Normal

– Setting up the orientation tolerance is done with the 3 additional config.pro options on the next

slide.

Assembly Constraint Tweaking

Use these options to change how constraints are applied by default.

22

• Check if position fits Angle or Normal. For this use values set for options: – comp_angle_offset_eps (“-1” seems to work ok)

– comp_normal_offset_eps (“-91” seems to work ok)

• If position does not fit Angle or Normal, then it will be either Coincident or Distance.

Here decision is made based on the value of: – auto_constr_offset_tolerance = (0.5 of the model size by default). If initial distance is bigger than this value, you will

receive Distance, if less, Coincident.

– Note: Value is relative to the size of each component being assembled.

Assembly Constraint Tweaking (Cont.)

Use these options whenever “auto_constr_always_use_offset” is set to No* .

23

Assigning Mass to Assembly Components

You can input a known Mass value for a Part or Assembly instead of calculating from

geometry and density (material).

1. File > Prepare > Model Properties > Mass Properties >

Change

2. Define Properties by

Geometry and Parameters.

3. Edit Mass field as needed.

4. “Calculate” to gather related

values.

5. Analysis > Mass Properties.

6. Select Assigned option.

7. Calculate.

Creo will use assigned mass

values in place of calculated

masses when they exist.

24

• Change “Secondary Previewed Geometry” in system colors to enhance

the visible status of incomplete assembly constraints.

Previewing Assembly Constraint Status

Partially Constrained

File > Options > System Colors

25

• Disable Automatic Update – Reduce memory usage and assembly cut

warnings by manually updating intersection list. – Uncheck Automatic Update and remove any non-cut models.

• Why? - “Intersected” models are duplicated in memory. – Increased memory usage.

– Assembly Cut regeneration warnings for components “intersected” without geometry changes.

– Additional models may be automatically added to Intersected list when added to the assembly if

Automatic Update is left enabled.

Assembly Feature (Cut) Considerations

26

• On-Demand Simp. Reps – Allow quick retrieval of required

reps only when they are needed for assembly operations.

• Open Subset – Allows the retrieval of an ad-hoc simplification

without creating a new Simplified Representation that is saved

in the assembly. Thought of as a temporary Simp. Rep.

• Auto_backup_new_placemnt_refs – Automatically backs up

assembly references to the assembly context, allowing

component placement to be updated/modified when using

Graphics Reps and lightweight Graphics Reps.

• Copy as External – Creates a separate assembly with only the

models included in that Rep. Allows you to share subsets of a

top assembly to other users, and their changes filter back to

the upper level. Note: Must use “dependent” option for upward

filtering.

Large Assembly Management

27

• Components that were created using “Save a Copy” can now be replaced easier

using the Reference Tag Evaluation utility. – Evaluation rules include “By History”, which can identify that features in each model come from the same

source.

Replace Component Enhancements

The Replace command now handles copied components in “unrelated” replace.

28

Options Modeler

29

• template_cnfg_asm – Specifies the default configurable product template file.

• template_module – Specifies the default module template file

Config.pro Options

30

• When changing variant specifications. – To apply a different variant builder option, double click the modified Master representation from

the view manager to revert it back to the original and then apply the desired option.

• Save Variant Specifications to the assembly for reuse.

Variant Builder Tips

31

• Overbuilt Assemblies 1. (Top Level) File > Save As > Save As Configurable Product

2. (Overbuilt Components) RMB > Transfer into Module

• Interchange Assemblies – File > Save As > Save As Configurable Module

Legacy Data

32

Mechanism

33

• Wildfire 4.0 mechanism connections will properly convert to Creo 2.

• Typical Mechanism Workflow 1. Create Connections in assembly mode (Pin, Slider, Slot, etc.)

2. In Mechanism application, define servo motors to create motion profiles.

3. Create motion relationships if needed (Gears, Belts, Cams).

4. Define Mechanism Analyses (servo motors and start/end times).

5. Define Measures and graph them against previously run analyses.

General Mechanism Notes

34

• Constraints can often be converted to connections without the need to

redefine references. – Coincident constraints converted to Pin connection once Allow Assumptions is unchecked.

Otherwise, Convert Constraints to Mechanism is greyed out.

– Mechanism Connection type assigned is based on constraint types already defined.

Converting Constraint Sets to Mechanism Connections

35

• Config.pro - enable_advance_collision “yes”

• Assembly Model Properties > Collision

Detection Settings.

• Global Collision Detection or

• Partial Collision Detection

• Push Objects on Collision

Using Advanced Collision Settings

You can simulate part interaction without Mechanism Contacts (Cams, Gears, 3D

Contact) using Advanced Collision settings.

36

Type Total DOF Rotation Translation

Rigid 0 0 0

Pin 1 1 0

Slider 1 0 1

Cylinder 2 1 1

Planar 3 1 2

Ball 3 3 0

Weld 0 0 0

Bearing 4 3 1

General Varies Varies Varies

6dof 6 3 3

Gimbal 5 0 0

Slot Varies Varies Varies

Degrees of Freedom

Connection sets constrain motion while still permitting various degrees of freedom.

37

Creating Analyses

An analysis lets you define conditions for servo motors that move the assembly

• Select an Analysis type. – Position – verifies the validity of the mechanism based on

defined motors.

– Kinematic – used to analyze the motion of bodies as a

result of defined motor profiles.

– Dynamic – Incorporates forces to analyze reactions at

connections (e.g. the Normal load on a pin due to gravity

and Mass Properties).

• Choose Motors and define start/end times.

38

Creating Measures

A measure allows you to get dynamic information on a component as a result of the

Analysis definition (Speed, position, acceleration, etc.)

• Create measurements

(position, velocity,

acceleration, etc.)

• Use previously defined

analyses to get measurement

graphs and values.

39

Creating Snapshots

Snapshots allow you to capture mechanism position states for use in analysis

features, animations and to display in a drawing view.

Activate as “Explode State” in

a drawing view.

Set as Initial

Condition

40

Drawings

41

• In a Drawing, select the Window overflow from the View tab and pick New.

You will be prompted for a sheet number to navigate to.

• You can now work in multiple drawing sheets simultaneously. (Also works

well for large models where regular reorientation is time consuming).

Working in Multiple Windows

42

• Right-click while dragging a dimension will “Flip Arrows” on-the-fly.

• Use dimension names with “&” symbol in notes and other dimensions to

reference values parametrically (i.e. “&d17”).

• Use “Rounded Dimension Value” to prevent modification of nominal value

when decimal places are decreased.

• Text placed in Prefix/Suffix fields appear within “Basic” dimension boxes.

Text placed in Dimension text field appears outside Basic dimension boxes.

Dimensioning

43

• Allow_refs_to_geom_reps_in_drws – Controls whether dimensions and

notes can be created in views using Geometry Reps. Care should be taken

as dimensions and annotations may not update if geometry changes.

• Auto_regen_views – Sets whether drawing views update automatically

when changing sheets or windows. Set to no, drawing views must be

updated manually, but large drawing performance is dramatically improved.

• Hlr_for_quilts – Determines if HLR is performed on quilt features.

• Save_display – Saves the display of drawing items such as notes and

dimensions so that they are shown when a drawing is retrieved in read-only

mode.

• Force_Wireframe_in_drawings

Managing Large Drawings (Config.pro Options)

44

In this drawing there is a Set

Datum that is currently

hidden from view. Although

we can select it from the

Drawing Tree and “unerase”,

it will still be hidden if it is on

a hidden layer.

The easiest method is to

leave the layer containing

datums “shown” and control

the datums visibility through

“Erase/unerase”, otherwise

you need to set individual

view layer status (shown on

next slide).

Displaying Set Datums on Drawings

Set Datum visibility is controlled through layers, but they can also be erased.

45

To set the layer status for an

individual view, we pick the

view from the layer tree

Active View drop-down and

then set the layer status. This

views layers will now behave

independently of the

drawings layer status, and

must be managed separately.

To set the layer status of the

view back to that of the

drawing, we select the view

again in the Active View list

and click “Drawing

Dependent” in the Layers

drop-down

Displaying Set Datums on Drawings (Cont.)

Drawing views can have their layer status set independently of the top level drawing.

46

• File > Prepare > Drawing Properties > Detail Options – “user_command” ‘delete_erased_dimensions’

– “user_command” ‘delete_erased_axes’

• Add/Change > Apply or OK – The user_command is applied once and is not maintained in the .dtl file. It can be run again later

if required.

Dealing with Erased Dimensions and Axes

Some WF4 drawings may have large numbers of Erased items that must be deleted

prior to being shown in a different view. These can be deleted automatically through a

hidden drawing option.

47

• File > Prepare > Drawing Properties > Detail Options – User_command delete_erased_dimensions

– User_command delete_erased_axes

– user_command clean_duplicate_axes

– user_command update_note_text_padding

– update_drawing 1808656 (remove extra spaces in basic dimensions)

– update_drawing 2119624 (Crosshatching break across text)

– Update_drawing 2140864 (secondary dimensions show at maximum decimal places)

– update_drawing all (applies all updates. Use caution as this command may make more changes

than are desired)

• Config.sup Options – enable_auto_drawing_update yes *(required to use the options below)

– auto_drawing_update all

– auto_drawing_update_command delete_erased_axes

– auto_drawing_update_command delete_erased_dimensions

Advanced Drawing Update Commands

Some WF4 drawings may have errors or outdated standards when retrieved in newer

releases. The commands below can be used to update drawings as described.

48

• Under Table > Repeat region > Attributes select the table region > No

dup/Level > Recursive > bln by part > No cbl Info > done/return > done – The BOM table will now be sorted by Assembly sequence.

Sorting BOM tables by Assembly Sequence

Repeat Regions in BOM tables often sort alphabetically rather than by assembly

sequence. This can be changed through the Repeat Region Attributes.

49

Sketcher

50

1. Show Entity Locks – Toggles the display of sketch entity locks

that were used in place of dimension locks.

2. References – Provides a shortcut to the Sketch References

dialog.

3. Shapes shortcuts – Quick access to sketch tools such as Lines,

Rectangles, Circles, etc.

Selection-based Commands:

1. Lock – Locks sketcher entities in leu of locking individual

dimensions.

2. Rotate Resize – Activates the Rotate/Resize command.

3. Constraints (Tangent, Coincident, Equal, etc.) – creates various

constraints based on current selection of single or multiple

sketch entities.

4. OK/Cancel – Allows quick completion of sketch feature.

Expanded Sketcher Right-Mouse menu items

1

2

3

4

5

6

7

51

• When symmetry is desired, create Centerline features first, allowing Creo to give

symmetry assumptions while

sketching.

• Use Modify along with Lock Scale to resize

sketches that are grossly out of proportion.

Simplifying the Sketching Process

52

• You can save custom sketches into the palette folders and reuse them later. – Folders are located in <Loadpoint>\Common Files\Mxxx\text\sketcher_palette

– Create custom folders for custom Palette tabs

Customizing the Sketcher Palette Window

53

Resolving Failures

54

• Regen_failure_handling – No_resolve_mode*

– Resolve_mode

Specifies whether to enter resolve mode when regeneration failures occur.

Resolve_mode - Enter resolve mode when regeneration failures occur.

No_resolve_mode - Don't enter resolve mode when regeneration failures

occur.

• allow_save_failed_model – Prompt*

– Yes

– No

Yes - Failed models can be saved. No - Failed models cannot be saved.

Prompt - Let the user decide whether failed models can be saved.

Config.pro settings for managing failed models.

55

Top Down Design

56

• Used for design framework, space claims,

Interfaces between components and assembly

references. – Skeletons should contain Sketches, curves, surfaces and

Datums only.

– Not factored into Mass Properties calculations.

• Use in conjunction with Publish Geom. and Copy

Geom. to share design information. – Publish Geometry in the source part creates a “container” of

references that can be shared with a target part later.

• Use “multiple_skeletons_allowed” to share design

information between multiple skeletons.

• Create skeletons in subassemblies.

Skeleton Models

57

• For Skeletons that drive geometry and assembly position. – Use “Publish Geometry” and/or “Copy Geometry” that references the assembly context.

• For skeletons that drive geometry only (constraints/connections added

later in assembly context). – Use “Publish Geometry” and/or “External Copy Geometry” that references the skeleton model

directly.

– Allows placement between skeleton CSYS and component CSYS.

Standard Skeleton Model Methods

58

• Used for design framework of mechanized

assemblies. – Motion Skeleton is a .ASM that contains a standard skeleton

and “Body” skeletons.

– Standard skeleton contains design geometry.

– Body skeletons are assigned geometry from the standard

skeleton.

– The first Body skeleton created is assumed as the “Ground”

component and is fixed. Subsequent Body skeletons are

assigned assembly Connections assumed from sketch

constraints (point/point, point/line).

• Create parts in the assembly context – Parts are “attached” to body skeletons and assume their

motion definition. No assembly connections are created

manually.

Motion Skeletons Overview

59

Useful Surfacing Features

60

• Curves – Through Points, Offset Csys, From Xsec

– Define ends conditions (Tangency, Curvature Continuity).

• Boundary Blend – Similar to Blends, transitions between curves.

– First and second direction options.

• Intersect – Creates a new 3D curve from two 2D sketches/curves

– Creates curve at intersection of surface/surface or surface/datum.

• Merge – Combine surfaces into quilts, trimming excess geometry.

• Fill – Creates a surface within a sketch boundary.

• Thicken/Solidify

Common Surfacing Tools

61

Using PrecisionLMS for Web-Based-Training

62

• Go to PTC.COM – Services > eLearning

• Login – Learn and Explore tab > Precision LMS

– Use assigned login information.

Accessing PrecisionLMS