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Autodesk - Training - Ribbon Cable: Part 3, Ribbon Cable Exercise
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Ribbon Cable: Part 3,
Ribbon Cable Exercise
This is the third in a set of three Skill Builders. In this Skill Builder you practice the skills you learned in the
second Skill Builder, this time using a more complex sample model. Though not necessary, you may want to
complete the second Skill Builder, Creating Ribbon Cable, before proceeding.
Expected completion time for this Skill Builder is 45 minutes to 1 hour.
This Skill Builder is intended for use with Autodesk Inventor 2008.
In this exercise you recreate an existing ribbon cable. As you work through this exercise, you may want to keep
the original, unmodified sample file open for reference as you work with the sample file copy. Optionally, rather
than keeping both sample files open, you can print a screen copy of the unmodified sample file. Either method is
only intended to provide a visual reference of the completed ribbon cable.
Set your active project to Samples.
Click the Open tool and then select (select but dont open) Personal Computer.iam, located in Assemblies >
Personal Computer. Click the Options button and select the Ribbon Cable Creation Level of Detail
Representation. Click OK, and then click Open.
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Autodesk - Training - Ribbon Cable: Part 3, Ribbon Cable Exercise
Save a copy of this file. Use Personal Computer tutorial.iam for the file name.
Open Personal Computer tutorial.iam.
Redefine the default isometric view, as shown.
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The assembly already contains two ribbon cables. Edit the CD Ribbon Cable sub assembly.
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Note: To create a screen print of the existing ribbon cable, select File > Print. You can then print a paper copy to
refer to as a guide as you re-create the ribbon cable.
Expand the browser node for the CD Ribbon Cable part ( ). Turn off the visibility of RibbonCable1, nested
under the Ribbon Cables folder.
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Autodesk - Training - Ribbon Cable: Part 3, Ribbon Cable Exercise
(The three ribbon cable connectors should still be visible.)
Click the Create Ribbon Cable tool .
Select the first connector.
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Select the end connector (this is the third connector in the series). A temporary spline is drawn between the
connectors.
Flip the direction of the connection ( ) for the end connector.
Select 28AWG_40Con from the Name menu.
Click OK.
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The spline needs nine intermediate points. Three of these points are located on the second and third connectors.
The other points are located relative to surrounding geometry. (You add one of these points near the end of this
Skill Builder.) You set these points in their approximate locations and then precisely align the points after creation.
Click on the motherboard mounting plate to set the first point. (The distance in the tooltip is the default offset from
the reference geometry.)
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Set the second point. Again, the reference geometry is the motherboard mounting plate.
Set the third point. The reference geometry is the bottom of the CD drive.
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Set the fourth point.
To set the fifth point, select the work point on the second connector.
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Rotate the model similar to the image. Set the sixth point on the work point on the other side of the second
connector, as shown. This is the work point in the center of the pin row, located between two of the pin points.
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Press F5 to return to the previous view.
Before setting the next point, right-click and select Edit Offset. Enter1 in and click OK.
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Click to set the point.
Select the work point on the third connector.
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Right-click and select Finish. (The cable does not render because the folds have not yet been created to remove
the unrealistic lateral bends.)
Next, you align the spline points relative to the connectors and one another.
Right-click the first intermediate point and select 3D Move/Rotate.
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Click the Redefine alignment or position button . Select the triad sphere and then select the work point
on the first connector, as shown.
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This point is now in lateral alignment with the center of the connector.
Drag the red arrowhead approximately 2.6 inches.
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Drag the green arrowhead approximately 0.5 inch.
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Click OK.
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Right-click the next point and select 3D Move/Rotate.
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Click the Redefine alignment or position button. Select the triad sphere and then select the point you just
adjusted.
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Drag the blue arrowhead approximately 2.8 inches.
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Click OK. The alignment of these two intermediate points relative to the first connector is such that the ribbon
cable will be configured with a perfect 90-degree direction change, after the first fold is created.
You move the next point such that a bend is created as the ribbon cable travels along the housing plate to the
bottom of the CD drive.
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Use the 3D Move/Rotate tool to align the point, as shown in the following images.
Align the point with the preceding point.
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Drag the triad along the Z axis 0.125 in.
Drag the triad along the Y axis -0.125 in (negative 0.125 in), and then click OK.
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To align the fourth intermediate point with the third intermediate point and the work point on the second
connector, you need to measure the X and Z offsets between the third intermediate point and the point on the
connector.
From the Tools menu on the Standard Toolbar, select Measure Distance. Select the third intermediate point (the
point you just aligned).
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Select the point on the second connector.
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Make a note of the Delta X and Z values. Close the Measure tool. This image shows the
Delta X offset direction.
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Right-click the fourth intermediate point and select 3D Move/Rotate.Click the Redefine alignment or position button. Select the triad sphere and then selectthe point on the connector. This image shows the triad relocated to the point on theconnector.
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Select the red arrowhead on the triad and enter the X delta in the X axis field of the 3D
Move/Rotate dialog box.
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Select the blue arrowhead on the tool and enter the Z delta in the Z axis field of the 3DMove/Rotate dialog box (this will be a negative number).
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Click OK. The fourth intermediate point is now precisely aligned with the preceding point and the point on the
connector.
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Next, you add folds to two of the intermediate points. Note: You could have created the folds prior to aligning the
spline points. The workflow order in this respect is not critical.
Click the Foldtool and then select the first intermediate point.
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An indicator appears, attached to the fold point, to indicate the orientation of the fold.
Click the Shaftbutton in the Create Fold dialog box. Select an edge or face on the
first connector to align the shaft portion of the indicator normal to the connector.
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Click theArrowheadbutton . Select an edge or face on the connector so that thearrowhead portion of the indicator is parallel with the pin row.
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Ensure the Single Foldbutton is selected, and then click Apply. The path geometry forthe fold is created. Two additional work points are also added to help define the path.
The cable does not yet render due to the one remaining unrealistic lateral bend. Youuse another fold to remove this bend.
Select the other fold point.
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Adjust the alignment indicator, as needed, so that the fold will be aligned properly to thesurrounding geometry and the connector. (The arrowhead portion of the indicator isnormal to the pin row of the second connector. The shaft portion is parallel to the pinrow.)
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Ensure the Single Foldbutton is selected, and then click OK.
The ribbon cable should preview with a wire render or partially-transparent solid render. This example uses solid
render , as selected on the standard toolbar.
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If the ribbon cable in your sample model will not preview:
Edit RibbonCable2 (nested under the CD Ribbon Cable part) and ensure that 28AWG_40Con is specified in
the Name menu of the Edit Ribbon Cable dialog box.
Ensure that the path points are aligned such that there are no unrealistic lateral bends or displacements. For
example, each segment of the path between the two folds should lie in the same Y plane. (The work plane in
the illustration is meant only to show the alignment.)
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See the second Skill Builder in this set the end of the Skill Builder contains tips for troubleshooting.
In this example, notice that the point between the second and third connectors is not in alignment.
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This may be acceptable, as-is. If not, use the 3D Move/Rotate tool to align the points.
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There is interference where the ribbon cable passes through the CD drive.
Right-click the spline, and then selectAdd Points. Add a point to the spline, as shown.
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Right-click and select Finish.
Use the 3D Move/Rotate tool to adjust the point and remove the interference.
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Return out of the ribbon cable subassembly.
Save the assembly. This is the end of this Skill Builder.
In the three Ribbon Cable Skill Builders, you learned how to:
Place a pin group on a ribbon cable connector.
Author a ribbon cable connector.
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Create a spline to define a ribbon cable path.
Place and align intermediate spline points to fully define and refine the ribbon cable path.
Add folds to the ribbon cable to define lateral direction changes in the ribbon cable.
Remember to check Help for further information on ribbon cable and ribbon cable connectors.
Copyright 2008 Autodesk, Inc. All rights reserved.