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I am trying to figure out the logic behind the base point option of the sweep command. In my case I am attempting to create the thread of an auger. I initially tried to put the profile at the end point of the helix, to indicate the base point. But, in my V14, that has no effect on the default base point. Though, in more recent testing, I find that I can get predictable results by moving the profile to the end of the helix, turning ALIGN off, and not use the base point option.
My earlier attempts involved keeping the profile off to the side, and setting Align to On, and then using the BASE option, and choosing what I want to be the base... but it put the base point on the inside of the helix. Next I mirrored the profile, and chose the same base point as before, and this time it worked. But, the trial-and-error approach is taking a lot of time. The user manual does not address this topic at all, other than to say, "Defines the point on the sweep entity that follows the path."
So far, after a few hours of effort, I have been unable to figure out the logic that the software is following. Can anyone explain?