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NX Drafting Commands II

We will examine, using the views shown above, how to modify views to show hiddenlines, how to control the visibility of the smooth edges produced by adding fillets androunds to the model, how to insert centerlines, how to create an auxiliary view and howto create and modify the display of various section views.

How to Show Hidden Lines

Select the view for which you wish to show hiddenlines. Move the mouse to highlight the ViewBoundary (it may be turned off) and pick. Multipleviews may be selected by using the CTRL key.

With the mouse pointer stilllocated on the view boundary,press the RMB to open thescreen menu.

Select Style

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Select the Hidden Lines tab and make surethe box adjacent to the Hidden Line selectionis checked (it should be by default).

Use the drop-down menu to change thedisplay option for Hidden Line from Invisibleto Dashed.

NOTE: The dynamic display of the dashedlines will change depending upon youDisplay Zoom setting. This DOES NOTaffect the line format at output (e.g. printing)

Removing Smooth Edges Using the Style Command

Select the boundary of the desired view.With the mouse pointer located on the viewboundary, press the RMB.

Select the Style command

In Style, select the Tangent Curves tab

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Toggle OFF the Smooth Edges display by removing

the check in the box adjacent to the term.

NOTE: The Style commandalgorithm for smooth edge removalwill not work as desired in all casesdue to the complexity of somemodels. In these cases lines youwish to keep may be removed fromview and/or smooth edges may stillremain after using the command. Inthese cases we will use a differentprocess to change the display ofindividual lines.

Changing Line Display Using View Dependent Editing

View dependent editing will allow us to modify the display characteristics of individualentities in our drawing views. We can only edit in one view at a time.

Erase versus Delete: Common terminology in modeling systems is to use Erase andDelete for different operations. Erase means to change the entity such that it is nolonger displayed. It does however still exist in the database and can be restored ifdesired. Delete means to remove an entity from the model database

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To erase smooth edge curves from the view atright using a View Dependent Edit

Edit > View > View Dependent Edit

Select the view to be editedby selecting the viewboundary.

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Once the view is select, the command dialogue boxbecomes active.

Select the option to Add Edits > Erase Objects (upperleft hand selection)

Choose the edge that you want to change the displayofnote that you can also select all edges of a face bymoving within its area viewbe careful of thisnotewhat is highlighted.

After selection, pick OK. The edge willbe erased and the command will remainopen allowing you to make morechanges.

You can select as many edges as youwish before picking OK.

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NOTE: To restore an edge which was unintentionally erased, select Delete Edits >Delete Selected Erasures. Then move the mouse to where the line was shown. It willhighlight and is selectable. Finish with OK.

Adding Centerlines to Views

To add centerlines to views, use theInsert > Centerline commands. The differentcommands refer to different formats ofcenterlines.

To insert a centerline for the line view thesurface axis, use Insert > Centerline > 3DCenterline.

Go to the rectangular view of thehole and pick the area view ofthe cylindrical surface.

Pick here

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When first created (and with the command still open), thecenterline will appear as shown.

With the command still open, youcan pick other locations forcenterlines as shown in theexample.

When finished with selections,

pick OK and the centerlines willbe placed.

If the incorrect surface is highlighted when trying to pick the rectangular view, simplyhover over the location without picking and the QuickPick dialogue will open. Simplymake the appropriate selection from the dialogue.

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To create the centerline for the point view ofthe axis (crossing centerlines), use Insert >Centerline > Center Mark

Move to the edge of the circular view of thesurface. In the example below, we are placinga centerline at the end of the slot.

Pick OK and the centerline is created.

Multiple edges can be selected before picking OK

Note that the orientation of the centerline is automaticallyaligned with the orientation of the arc.

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If the inferred hinge line does not produce the desiredview, you must set the hinge line manually. To do this,go to the Vector Option dropdown and change theoption to Defined. Chose a line to define the projectiondirection, e.g. perpendicular to the desired direction.

If the view does not look correct (for example,backwards), try checking the box to Reverse ProjectedDirection and note the direction of the arrow on parentview.

Finally, dynamically move the projected view to thedesired location and select with the LMB.

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Adding a Full Section View

Insert > View > Section > Simple/Stepped

Select the parent view for the construction by picking the view boundary.

A cutting plane line will appear at the crosshairs (do not worry about orientation yet).

Select a feature to define the location of the section (typically the center of a hole orslot) as shown in the figure above.

Move the mouse to define the projectiondirection for the section view and use the

LMB to select the location for the view.

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The final view will include the cutting planeline with labels, the hatched view and thelabel for the section view.

NOTE: Items such as the orientation of

and spacing of the hatching, the size andlength of the arrowheads on the cuttingplane line, etc. can be set globally (as wedid in our drawing setting given in anearlier handout) and also can be set locally(for one view) by using the Stylecommand.

For example, pick the crosshatching tohighlight, then press the RMB and thenselect Style.

Insert a Removed Section View

Insert > Section > Section > Simple/Stepped

By the parent view for the section.

Pick a location for the cutting plane by pickinga point on the parent view.

Place the section view in a temporarylocation.

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End the view insertion command (close thedialogue box)

Pick the boundary of the section view and waitfor the Move Arrow crosshair to appear.

Move the view to the desired location on thedrawing. Place with the LMB.

Creating an Half Section

Insert > Section > Half

Select boundary of parent view.

Pick feature to locate section cutting plane(center of hole in example, pick hole edge)

Align the segment of the cutting plane withoutthe arrowhead by picking the centerpoint ofthe view. This will ensure that you get a halfsection.

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Move the mouse to locate the section and use theMMB to locate.

To remove the hidden lines from the section view

either;

Use the Style command (pick view, RMB, thenStyle) and use the Hidden Line tab to set hiddenline format to Invisible for the view.

Or, use the View > View Dependent Edit (see previous) command to change the displayof just the hidden lines in the sectioned half of the view.

Creating an Offset Section

Insert > View > Section > Simple/Stepped

Select the parent view.

Starting from one side of the object, selectthe first feature that the cutting plane willpass through.

Go to the Section View Dialogue and select AddSegment.

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Pick the next feature that the cutting plane passes through.

Repeat the process until all cut features have been selected.Note: You do not have to reselect Add Segment. As long as thecommand is highlighted in red, you can continue to pick cutfeatures.

When all features have beenselected, select the dialogue boxoption, Place View.

Move to the desired location and use the LMB to placethe view.

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You may (as seen in this example) haveto do some cleanup of the view. Theproblem is caused by where the offset(vertical in this case) portions of the

cutting plane through the object. Torectify the problem, we will move wherethis cuts occur by moving the verticalsegments of the line.

Move the pointer over the cutting plane line and press the RMBto open the menu. Select the command Edit.

In the dialogue box that opens, select option, Move Segment.

Pick the segment you want torelocate.

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Pick the point you want the segment to passthrough (YOU CANNOT DYNAMICALLY DRAGIT). Be careful to not place the crosshair targetball over another entity or you may get a selection

you dont want.

For example, pick here

Repeat the process for each required line (onemore in our example).

When finished, select Apply in the dialogue box.

Finally, move the mouse pointer over the boundaryof the section view, press RMB to open the menuand select the command Update. This will applythe change of moving the cutting plane segments.

Final view