How to model a curved spring
Let me show you how to use some surface commands which combine in a 3Dsketch for the solid sweep.
No coil command needed.
on youtube at:
https://youtu.be/wcB5OBTrqfA
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Step 1: 1st sketch


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Step 2: drawing

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Step 3: 1st surface sweep

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Step 4: 2nd surface sweep

The 40 coils account for the twist.
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Step 5: 3D intersection curve

Start a 3Dsketch and define the intersecting geometry with the surfaces.
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Step 6: workplane

Create a workplane normal to that curve at any endpoint
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Step 7: final sweep

create the solid sweep.
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Step 8: video
