Tapered Thread Modeling
Tapered Thread Modeling
(OP)
Hi,
I've had problems with modeling screws that follow a tapered profile in the past. Usually I can work around this in a variety of ways, but this time, I'm really not sure how to proceed.
If I make my profile sketch big enough to cut away at the tapered portion, it becomes self intersecting, and will not complete.
I've attached a model showing the problem. Any ideas how to make this work? I am really struggling here and I'm not sure how to make this work.
I've had problems with modeling screws that follow a tapered profile in the past. Usually I can work around this in a variety of ways, but this time, I'm really not sure how to proceed.
If I make my profile sketch big enough to cut away at the tapered portion, it becomes self intersecting, and will not complete.
I've attached a model showing the problem. Any ideas how to make this work? I am really struggling here and I'm not sure how to make this work.






RE: Tapered Thread Modeling
I prefer to have the classical run-out to the vanishing point on Box and Pin forms, this gives the piece a more professional appearance than simply pulling straight out of the thread. I do this by having Path A follow the thread in full form, then splicing Path B to it at the start of the vanishing point. My method standardizes three revolutions with a pull-out along a 45 degree angle during this operation. In other words, I spiral out at the same pitch rate of the threads while increasing my radius along that helical path. Works very well.
Big problem, tremendous size for the file. If you're into the art, you can try this method. But for practical engineering purposes, a cosmetic thread gets the point across.
Good luck with it, it can be tricky.
Regards,
Cockroach
RE: Tapered Thread Modeling
Anyone have any ideas on this particular file?
RE: Tapered Thread Modeling
Still looking for a way to build this.
Thanks!
RE: Tapered Thread Modeling
The profile doesn't look right, you may have picked up the wrong location to the vanishing plane.
What is that thread designation?
Regards,
Cockroach
RE: Tapered Thread Modeling
RE: Tapered Thread Modeling
Dan
www.eltronresearch.com
Dan's Blog
RE: Tapered Thread Modeling
RE: Tapered Thread Modeling
You may need to two the cut in two passes. First cut the left hand side, then use another identical path to cut the right.
Good luck with it!
Regards,
Cockroach