AutoCAD 2007/2008/2009

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pquappe
Posts: 4
Registered: ‎01-05-2010
Message 1 of 11 (592 Views)

extrude along a path

592 Views, 10 Replies
01-05-2010 09:33 AM
I am locating a railroad track and I end up with a 3d polyline of the rail. Is there a way to draw a cross section of a rail, and have the cross section shape follow the 3d polyline. So I end up with a 3d rail with the alignment of the poltline
Distinguished Mentor
tschau3
Posts: 509
Registered: ‎10-04-2007
Message 2 of 11 (592 Views)

Re: extrude along a path

01-05-2010 09:44 AM in reply to: pquappe
Are you looking for the SWEEP command?
*None
Message 3 of 11 (592 Views)

Re: extrude along a path

01-05-2010 10:03 AM in reply to: pquappe
pquappe wrote:
> I am locating a railroad track and I end up with a 3d polyline of the rail. Is there a way to draw a cross section of a rail, and have the cross section shape follow the 3d polyline. So I end up with a 3d rail with the alignment of the poltline
Extrude solid and use the polyling as the path.
Member
pquappe
Posts: 4
Registered: ‎01-05-2010
Message 4 of 11 (592 Views)

Re: extrude along a path

01-05-2010 10:43 AM in reply to: pquappe
thank you, I was not sure what I was looking for, but read the help on sweep and it seems to do the trick!
Member
pquappe
Posts: 4
Registered: ‎01-05-2010
Message 5 of 11 (592 Views)

Re: extrude along a path

01-05-2010 11:26 AM in reply to: pquappe
thank you also, tried that and it works perfect. A couple of hours ago I was clueless on how to do this and now I know 2 ways, thanks again. Just as a after thoguht. Is there a reason to use either sweep or extrude over the other?
*David Parker
Message 6 of 11 (592 Views)

Re: extrude along a path

01-05-2010 01:12 PM in reply to: pquappe
Also you can draw the pair of track x sections, space them to rail spacing
and sweep or extrude both at once, Pick a base point that corresponds with
the location of the path, ie track center line or centerline of one rail.

copy the track profile and paste it in the drawing as sweep or extrude
erases the profile if you need it more than once.

dave


wrote in message news:6312605@discussion.autodesk.com...
thank you also, tried that and it works perfect. A couple of hours ago I was
clueless on how to do this and now I know 2 ways, thanks again. Just as a
after thoguht. Is there a reason to use either sweep or extrude over the
other?
*None
Message 7 of 11 (592 Views)

Re: extrude along a path

01-05-2010 01:33 PM in reply to: pquappe
pquappe wrote:
> thank you also, tried that and it works perfect. A couple of hours ago I was clueless on how to do this and now I know 2 ways, thanks again. Just as a after thoguht. Is there a reason to use either sweep or extrude over the other?
In some cases sweep would be preferable. Extrude can, SOMETIMES, give
undesirable results.
Member
pquappe
Posts: 4
Registered: ‎01-05-2010
Message 8 of 11 (592 Views)

Re: extrude along a path

01-05-2010 02:12 PM in reply to: pquappe
Please excuse my ignorance with this. I have used both sweep and extrude and visually I am getting the result I need. If I ID any part of the extrude or sweep it gives me the proper elevation. The problem I have is it doesn't seem to make a 3d ployline. If I take a section thru the tracks it just seems to be using the 2 polylines I used as the alignments. Is there a way to make these new lines 3d polylines? I hope I am explaining this properly
*None
Message 9 of 11 (592 Views)

Re: extrude along a path

01-05-2010 03:23 PM in reply to: pquappe
pquappe wrote:
> Please excuse my ignorance with this. I have used both sweep and extrude and visually I am getting the result I need. If I ID any part of the extrude or sweep it gives me the proper elevation. The problem I have is it doesn't seem to make a 3d ployline. If I take a section thru the tracks it just seems to be using the 2 polylines I used as the alignments. Is there a way to make these new lines 3d polylines? I hope I am explaining this properly
Sweeping or extruding makes a solid.
*Expert Elite*
JDMather
Posts: 28,055
Registered: ‎04-20-2006
Message 10 of 11 (592 Views)

Re: extrude along a path

01-06-2010 06:11 AM in reply to: pquappe
>Is there a way to make these new lines 3d polylines?

Try xedges (you might want to make a different color active first).

http://home.pct.edu/~jmather/content/CAD238/AutoCAD_2007_Tutorials.htm

Attach your file here if you can't figure it out.

Sweep allows alignment and twist optiions that Extrude doesn't have.
Extrude allows scale (or is it draft, I don't remember, I've forgotten most of what I know about AutoCAD) that Sweep doesn't have.
Please mark this response as "Accept as Solution" if it answers your question.
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