threading

[expaddy]

Could someone please point me in the direction of a tutorial on how to make a realistic thread,(tapering and paralell).
I have used the search but can only find lisp routines and at the minute I want to make sure I can do everything myself before I get into lisp.
I am particularly interested in mulitiple start trapezium threads.

While I am here, anyone know a good free site where I can display results to show them off in the showcase area?

I would like you all to see that your help is not going to waste. :wink:

[expaddy]

BUMP??

Anyone out there?

[Mr T]

BUMP??

Anyone out there?

There is threads if you search, here on threads.

Just draw a box in 3d, divide it up in equal parts. Use the se parts
to create a SPLINE or 3D polyline then extrude along that as a path.

Nick

[fuccaro]

Expaddy
The first thing coming in my mind is... Lisp. Also it is possible (I think) to calculate the coords with Excel and create a script file to draw a 3DMESH.

Nick
Did you find a way to extrude something along a Spline curve? Or we are talking about Inventor?

[Mr T]

Expaddy
The first thing coming in my mind is... Lisp. Also it is possible (I think) to calculate the coords with Excel and create a script file to draw a 3DMESH.

Nick
Did you find a way to extrude something along a Spline curve? Or we are talking about Inventor?

In acad 2k save as r12 *.dxf then import into acad 2k then extrude with that spline as a path.

In inventor there is a dialogue box for you, it's seriously easier.
It even asks for BS (british standard) thread or american !!
Nick

[expaddy]

thx for your help guys. From one of those sites I at least gained the knowledge that what I was doing was correct and it was autocad that was behaving strangely. I used one of fuccaros lisps to make a spiral and tried to extrude along that path but as I now know autocad wont do that.

thx for the lisp fuccaro :)

Mr t could you explain further about splitting a box and using the se parts??

Mr t is there a steep learning curve between ac and inventor and is it used in engineering??

[Mr T]

Mr t could you explain further about splitting a box and using the se parts??

Mr t is there a steep learning curve between ac and inventor and is it used in engineering??

See the forum topic here
http://www.cadtutor.net/forum/viewtopic.php?t=212&highlight=spiral

Inventor is so easy to learn and easier than acad. Rather than use the command line it gives you a dialogue box and live preview eg an external/internal thread. And a screw hole, asks and shows a counterbore or countersink and if it's threaded.

I'll post up a wee video clip showin gyou this if you wish.

Inventor is a mechanical and manufacturing modelling programme.

Nick

[expaddy]

After reading your previous post I went straight to autodesk and had a look and from what I seen it looks ok. I'll have to get myself that as soon as possible. Is it worthwhile getting a book or not?

In reference to threads I have found some lisps and giving those a try instead. Best way forward I think.

[Mr T]

After reading your previous post I went straight to autodesk and had a look and from what I seen it looks ok. I'll have to get myself that as soon as possible. Is it worthwhile getting a book or not?

In reference to threads I have found some lisps and giving those a try instead. Best way forward I think.

Try one of the test drives of inventor their free and excellent.

Nick

[Yahia Madieh]

See the link here
http://www.caddigest.com/subjects/autocad/tutorials/select/southworth_3d_screw.htm