SKETCHING IN Pro/ENGINEER

Part 1

Improved Intent Manager Terminology

– Entity, origin, constraint, reference, relation, parameter, weak dimension, strong dimension, conflict, etc. (Pro/E text pgs. 7 - 12)

– Will learn on a need to know basis. Entity: any element of the section geometry,

such as, line, arc, circle, etc. Vertex (vertices): point, endpoint Origin: starting point

– For example, in a new part file sketch this is the intersection of the horizontal, frontal and profile planes. One plane will be displayed parallel to the screen (frontal), while the other two will appear as edge views (horizontal and profile).X=0, Y=0, Z=0 (0,0,0)

Screen Layout in Part File Mode

One-line Help

Dashboard & Message Area

Toolbars

Pull down menus

Roll over

Sketching (Drawing) area

Model Tree & Navigation Area

Sketching icons

Selection Filter

Do Not Maximize – need room for dialog boxes

Sketch in Part File Mode Creating a sketch in a part file, File – New –

Part – , allows the modeler to sketch a 2-dimensional cross section of the object and then add a third dimension by extruding, revolving, etc.– In the example to the right, the

cross section of the part will be sketched on the frontal plane, giving us height and width. The profile and horizontal planes will be viewed as edge views, which means the third dimension, depth, can be added by extruding, revolving, etc.

2-D Sketch Only A sketch may be created 2-dimensionally, File – New

– Sketch, which means a the modeler may NOT add a third dimension.

To learn how to sketch, trim/extend, drag, add and delete constraints and dimensions we will start with the 2-dimensional sketch mode only.– Advantages:

» We don’t have to decide which plane to sketch on.» We don’t have to worry about where to start the sketch (origin).» If we accidentally draw a line on top of a line, leave a gap

between two lines, etc., we can save the sketch and come back to it later. If we tried to extrude with these errors, we would not be able to extrude the sketch until all errors were corrected.

– Disadvantage:» Only one sketch may be open at a time.

Improved Intent Manager Inside Sketcher

– Select appropriate sketching icon.– Move mouse to where entity will start/end and

click mouse left mouse button, repeat until finished with drawing that type of entity

– When finished sketching, select the Select icon. (Shortcut – select the middle mouse button)

Watch for hints and/or instructions– Roll over (or message line)

– Prompt line

Sketching Icons Line: object, line 2 tangent, or center

line– Click, release, move (or drag), click, etc.– Select icon or middle mouse button to end

Rectangle– Click (corner), drag/move, release, click

(diagonal corner) Circle: circle, concentric circle, circle

3pt, circle 3 tangent, ellipse– Circle: click (center of circle), drag/move,

click (point on circle)– Concentric circle: (share same center

point): select existing circle, drag/move, release, click (point on new circle)

Sketching Icons cont’d. Arcs: tangent & 3 pts, concentric,

center/endpoints, 3 tangents, & conic– 3pts. or tangent: select starting and ending

endpoints, select point on line. If the arc is to be tangent, what for tangent relation symbol (T).

– Concentric arcs:(share same center point): select existing arc, drag/move, release, click (point on new arc)

– Center/endpoints arc: click (center of arc), drag/move, click (starting point of arc), drag/move, click (ending point of arc).

Fillets and Rounds:– Select two entities

Demo (For practice turn off dimensions and endpoints)

Sketching Icons cont’d.

Select Icon selected Any other sketcher icon selected, i.e., circle – X at end of cursor

Practice Start a new sketch file.

– File – New – Sketch – type in the file name Practice1)

Using your Sketcher – Tools web print out, try all sketching icons, especially line, rectangle, and circle.– Watch constraints (condition defining the geometry of

the entity, such as, horizontal, vertical, perpendicular, etc.)

» When are they added?» What do the symbols mean?

To close a sketch and start over.– Select the Continue icon.– Start a new sketch, increase the number behind

the file name one number. I.e., Practice2

It is more important to understand how to use each command than to sketch a real shape

Deleting Entities Select Select icon (Shortcut: Middle Mouse button)

Several ways to select entity(ies) or constraint(s) – Click on entity or constraint– Use the Shift key to select multiple entities– Window entities (entity must be entirely inside box) – Select Edit – Select – All

Select one of two methods– Press Delete key – Right mouse button & select Delete

Repaint screen icon (Shortcut: CTRL-R)– Cleans up screen clutter

Practice deleting entities– If a sketch is open, close it– Start a new sketch (File – New – Sketch – type in a file name)

– Draw different entities– Practice deleting them one at a time and multiple entities.

Right Mouse Click Options Two Sets of Commands

– Top portion: editing, manipulations & selection – Bottom portion: creation commands

Not available in rubber band mode

Right Mouse Click Options cont’d. Factors to Consider

– What command is currently invoked– What kind of entity is selected– What is currently pre-highlighted

Select mode, blank drawing area

Select mode, sketch started

Line mode, blank drawing area

Line mode, sketch started

Right Mouse Click Options cont’d

Select icon only Entity selected Dimension selected

Practice If a sketch is open, close it. Start a new sketch file.

– File – New – Sketch – type in the file name Practice)

Sketch multiple lines, rectangles, circles, etc. Practice right mouse selections. Practice deleting single and multiple entities. Close the sketch.

Entity Colors

Wildfire• Entities will be yellow• When the cursor is near the

entities will turn light blue• When selected will be red

Colors may be adjusted to your liking.

Display Endpoints

Toggle display of endpoints

Line with endpoints turned off

Line with endpoints turned on

Selecting EntitiesIf the cursor is moved near an endpoint, or vertex, of a line or the center of a circle the endpoint or center will turn light blue. After it is selected it will turn red.

If the cursor is moved near an entity, such as a line or a circle, the entity will turn light blue. After it is selected it will turn red.

Asking ‘Is this what you want to select?’

Telling you this has been selected. Called Current Selection

Purple means ‘Is this what you want to select?’

Red means this has been selected. Called Current Selection

Drag Entities Dragging entities

– Select Select icon– Select Edit – Move – Select, click and hold, entity or vertex, drag, release– Use the CTRL key to select several entities at once.

Practice on – Lines

» Select somewhere along the line and drag» Select somewhere an endpoint and drag

– Circles and arcs» Select center point and drag» Select on circle/arc and drag

– etc.

Trim and Extend Entities Dynamically trim

– Deletes entity(ies). Trim/extend

– Trims/extends both lines, creating a sharp corner.

– Select keeper side of lines. Divide

– Breaks the entity where selected.

Additional choices outside of Improved Intent Manager

Divide: Breaks the entity where selected.

One Line.

Notice only two yellow endpoints are displayed.

Select Divide Icon.

Notice change in endpoint of cursor

Result: Blue endpoints tell us we now have two lines instead of one.

Result: Three lines instead of two

Place cursor over line where break is to occur.

Notice change in cursor.

Add a second break in the line

Be careful when endpoints are turned off - this line looks like one line

Trim/Extend: Trims/extends two lines

Two Lines

First Selection Second Selection Results

Notice end result is the same

Notice end result is different

Dynamic Trim: Deletes entity(ies)First Selection Result

Two Intersecting Lines

Dynamic Trim cont’d.

Select endpoint Drag endpoint past the line it will be trimmed to

Dynamic Trim the end of line to be deleted

Two Lines

Desired Result

End Result

If selected line does not intersect another entity, it will be deleted.

First Selection

Dynamic Trim cont’d.

Multiple Lines Drag the cursor over every entity to be deleted

Results

Trim Circle: Method 1 Dynamic Trim

Select portion of circle to delete

Select portion of line to delete

Select portion of line to delete

Given

Desired Result Notice constraints are turned off while in dynamic trim mode

Trim Circle: Method 1 Dynamic Trim

Trim Circle: Method 2 Divide & Delete

Select appropriate entity and press the delete key

ResultBreak at tangent point

Break at tangent point

Result

When breaking, you may select off to the side of the tangent point a small amount and still be okay

Practice Dragging entities Trim and Extend entities Break entities

Extremely important– Understanding how drag, trim, extend and

break works, along with performing them correctly, will save you time and a lot of stress when we start extruding our sketches.

Homework Complete Hands-On 15