Impossible screw not impossible with SW.

Thought I'd show you all a pretty I did.

At the bottom of JDMathers excellent tut's page is a picture of adrafted print of what looks like a mixing screw of an extrusionmill. I don't know why it's there but I took it as a puzzle forsomeone to model... Cause it's tricky.

I finally found time to give it a try. After a few false starts Idecided to model the threads with individual surfaces. Which was aleap of faith cause I was doubtful all that would knit.

With SWx variable pitch helix getting the threads was easy. Mergingthem smoothly was a lot of work but not much trouble. Getting theflats between the threads was real tough. I almost gave up. Theyhave to grow and shrink in width as the variable pitch / variablediameter helix advances.

When all the surfaces were done, I trimmed and knitted. Couldn'tbelieve it formed solid. But it did.

I inserted just the main threads into a new part cause the rebuildtime was getting large and there was still a lot of work to be doneon the pass through journal.

So if any of you out there are like me, you'll like seeing thesepics. I colored it pretty like a Christmas stick for the seasons,wack wack. Hehe. I did a lot of surfacing this year for money.Thanks to DiMonte for explaining surfaces and Paul Salvador for allthe examples that show abstract methods I would never figure out. Ihope JD puts another puzzle up for next year.

too bad i can't attach files. i don't know if this will work ornot.
http://forum.solidworks.com/fo...posible%20Screw%2Ejpg


SolidworksSurfacing