Need Help with wrapped spiral

Topics related to wrapped rotary machining in Aspire or VCarve Pro
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woodstripboats
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Joined: Wed May 09, 2012 9:12 pm
Model of CNC Machine: Shopbot PRS Alpha 60 x 96 x 12" indexer
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Need Help with wrapped spiral

Post by woodstripboats »

Just can't seem to figure out what I am doing wrong. I am trying to make this plug.... 7" long 4" od on one end, tapered to 3.5 on the other. I need to wrap spiral 1-5/8 to 1-3/4 times around this tapered shape. I can only get one turn on this thing.... see attached file.
spiral plug.crv3d
(59 KiB) Downloaded 234 times
Any help would be appreciated , thanks
Charlie

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dealguy11
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Re: Need Help with wrapped spiral

Post by dealguy11 »

You need to manually make the job size longer in the Y direction (to the top of the wrap vector) and make the Y dimension of the component the full height of the updated job size. This will result in the tapered component "wrapping" more than 360 degrees around the cylinder.

This change in job size isn't required when putting a spiral on a simple cylinder, but since you want to project the spiral onto a taper, you need to make sure there's a taper underneath the spiral for the full distance of the cut (not sure that sentence made sense, but hopefully you get the gist).

See the example pictures below, from your original file.
Attachments
Extended component.JPG
Extended component 3d.JPG
Steve Godding
Not all who wander (or wonder) are lost

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mezalick
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Re: Need Help with wrapped spiral

Post by mezalick »

You could also add an additional vector to continue the profile cut.

Michael
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plug.JPG
Michael Mezalick
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woodstripboats
Posts: 13
Joined: Wed May 09, 2012 9:12 pm
Model of CNC Machine: Shopbot PRS Alpha 60 x 96 x 12" indexer
Location: Mohawk,NY

Re: Need Help with wrapped spiral

Post by woodstripboats »

Thanks .....Got it! Appreciate the help! Thanks guys!
Charlie

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