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CAD tip CAD tip # 836:

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To draw a spiral curve use the 3DSPIRAL function in the SPIRAL.LSP utility - can be downloaded from DL Download.

If you need a 3D coil (spring) as a solid body (model), draw a circle (or another profile) and extrude it along the 3D spiral trajectory using the _EXTRUDE command. Or use the SOL_SPRING function in the LSP archive as above (sol_spring.lsp).

You can also use the SPRING utility from DL Download to model 3D solid springs (helical objects).

Since AutoCAD 2007 you can also use the HELIX command.

ACADACAD2008ACAD2007MDT
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2.1.2001    108196×   FAQ  
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applies to: AutoCAD · AutoCAD 2008 · AutoCAD 2007 · MDT ·

See also:
Tip 14405:How do I create a 3D helix or 2D spiral sketch in Fusion?
Tip 14204:How to draw a parabola in Autodesk Fusion (or other 2D/3D curves).
Tip 13960:Fermat's spiral in AutoCAD.
Tip 13906:How to construct a 2D spiral shape in Inventor?
Tip 13653:FPoly - draw fixed-length polylines in AutoCAD.
Selected tip: MDT can not find Excel 2000 Deutsch (German)version.


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