How to scale a tube spiral to make it more narrow at the top? I want to make it slightly conical, and I have no idea!
spiral2b.skp (386.9 KB)
What version of SketchUp are you using? What operating system? Complete your forum profile so we know what tools you have available.
Sketchup Go in a browser (Firefox)
MacBook Air, MacOS Sonoma 14.4.1
I’ll complete it
Ok. So your tools are limited. You can’t really scale the top of your spiral without affecting the whole thing. I would suggest modeling a tapering spiral to use as a Follow Me path instead. That way you can get the tapering spiral without having the tube become deformed in the process.
This is a quickie example.
FWIW, if you upgrade to the desktop version there are extensions that make quick work of modeling the tapered spiral path. The web based versions don’t have any facility to use extensions, though.
Ok, thanks for your reply. I don’t know yet how to make a tapering spiral, I’ll have to dig into that.
Best regards /Robert
PS. I’m new to using forums
Did you make the spiral to the right just now!?
Good luck with the tapered spiral. You could start by drawing a cylinder and scale just the top face to make it more cone shaped. Then draw your spiral around it.
As for your forum profile. click on the R in the yellow circle at the top right of the forum page. Then the person icon, Preferences, and Profile. After filling in the information scroll to the bottom and click on the button to save the changes.
Yes. I drew the tapered spiral with an extension in the desktop version of SketchUp, though. I just extended the ends with Line and 2-Point Arc to make the full path.
Updated the profile now.
Any chance you want to share your spiral 
it’s just what I’m looking for. Trying to illustrate cooling channels inside a 3D printed steel mold.
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What’re you building anyway? A still? Don’t worry. I won’t tell the revenooers. 
Here you go. No idea if it’s correct.
spiral2b.skp (869.0 KB)
Thanks! It’s to show how you can make more effective cooling in 3D parts
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