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Tutorial on spine feature in Creo Element pro aka Pro Engineer wildfire.
Here is the tutorial.
Step 1
Sketch >> Top plane.
Step 2
Draw a semi-circle.
Step 3
Extrude it as surface.
Step 4
Sketch >> Top plane.
Step 5
Change the view from planar using mouse middle button.
Step 6
Right click and hold it. Then select references.
Step 7
Select the end points on top plane as reference.
Step 8
Also select the other point too.
Step 9
Sketch orientation.
Step 10
Spline tool.
Step 11
Draw a spline by using vertex references.
Step 12
Exit the sketch.
Step 13
Insert >> Warp.
Step 14
Select the quilt as the body to deform.
Step 15
Click Spine tool.
Step 16
Select the spline as the chain.
Step 17
Type to warp radially from center.
Step 18
Now deform the quilt using the control points.
Step 19
Click OK and the feature is generated.