AutoCad 3D :: Self Intersecting Surface While Sweeping
Dec 12, 2011
I am trying to create a CAD drawing for the construction of Paddle Pop sticks. It is the basic shape of the Magnum sticks, but it is tricky because it has a 140 diameter taper, from the top of the jig to the bottom. I am trying to make the circle attached to the shape of the stick, and the Sweep the circle around the shape. But when I try to sweep it around, it says "The sweep results in a self-intersecting circle". I am using AutoCAD 2012.
P.S. I have attached the .dwg file so that it makes more sense.
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May 4, 2012
I am attempted to sweep an arc around a rectangle, but the program will only let me sweep on three of the four edges. Model and pic attached.
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Feb 27, 2012
I have a complex polyline I'd like to extrude through a finite radius and distance that is not obvious in this old version 13 I have to use.
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Apr 16, 2013
I am modeling an ASME pressure vessel with a 2:1 semi elliptical head upon which there must be a couple of lines of .375" trace tubing. I created a 3dpolyine that is the center line of this tubing, and joined all the segments into one so as to be able to sweep the whole thing and make one solid of the tubing run, but it simply will not sweep. I get a message this it is "unable to sweep the selected object." If I break the 3dpolyline, I can sweep parts of it, but the more complex the line segment, I again get the error message. I have attached a copy of the tubing centerlines.
The one on the left is the joined 3dpolyline, the one on the right is the 3dpolylines unjoined. (These were achieved using an intersection command of a rotated surface--the head profile--and an extruded surface--the tube tracing plan layout.) I have done this before, but only with the unjoined 3dpolyline, as in the right-hand example, but that is very time consuming as each segment must be swept. But I recently acquired a third-party LISP routine that joins the 3dpolylines into one. I'm thinking there must be a limitation on data of the 3dpolyline preventing the sweep, and wondering if there is a setting or system variable that will allow the more complex 3dpolyline to be swept.
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Nov 7, 2012
How to use sweep to successfully put threads in a hole. Attached is the drawing with a helical coil and an object in two different orientations (A and B). To the right of that, you can see the path they took for each. The object rotated from the original position before following the path. Tried changing the position of the object to sweep, but either it sweeps it 180 degrees from what it is already doing (still wrong) or the program says it is invalid and won't do anything till I put it back in the original rotational position and try again.
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Jul 13, 2011
I'm having a problem sweeping a curved object over a spline. The object will sweep over a straight line...but not on the spline. I keep getting "unable to sweep object(s)" in the command line. I could be doing it all wrong... I've attached the file.
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Feb 25, 2013
I draw 3D curved handrail, mainly just rectangular because i import the geometry in to Alphacam and run tool paths down them, but i keep getting faced with the problem of the twisting of a solid when sweeping along a spline or a 3D poly!
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Nov 7, 2012
I am trying to create a tube by sweeping a circle along a spline. I read many of the previous discussion threads on the topic but I still have some issues.
I first created my spline and transformed it in a polyline (some people recommended to do it). Then I created the circle. Finally I sweep the circle along the path.
The issues are the following:
1) when I look at the tube using the 2D wireframe mode, I can see that the primitives are not completely regular. In some points there are weird intersections and I don't know how I can fix them.
2) I hoped the tube was solid. However, when I exported (as .IGS) it and see in another program, I realized that it has only two circular caps at the extremities of the tube, but inside it is hollow.
I tried to transform it in solid or mesh or whatever, but it always gives me an error, saying that the object cannot be converted.
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Oct 29, 2013
I'm trying to make a part of different tubes by sweeping circles along lines. However one side of the part joins correctly, but other not. I'ill add photos of correct smooth join and uncorrencly unsmooth.
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Jun 8, 2012
How do I project the Proposed Road Level information from Road_1 at the intersection of Road_2 (Alignment_GA.jpg) onto the Start of the Profile for Road_2 (Alignment_Profile.jpg) to give me my tie in start point?
How do I obtain the exact change of the intersection Point? How can i extend Road_2 onto the horizontal curve of Road_1 so i know they exactly intersect?
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Apr 7, 2004
I am trying to modify a hoop instead of having a half circle, i half to cut the hoop short and add a flange, instead of starting over, is there a command I can use that I can create a flange and join the hoop and flange at the intersect..... the hoop was made using the fold feature...
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Jul 28, 2011
I am a beginner with AutoCad software, and I am currently using Civil 3D/Map 3D 2009.I imported a shp. file containing property information (owner, area, address, etc), and also imported an alignment row as a sdf. file. The row is a closed polygon.
My goal is to intersect these two types of data so that I end up with information on the number of properties affected by the row.
Is civil 3d 2009 capable of doing this? If so, how? I found a youtube video on using the 'Offset Alignment' command with Civil 3D 2010, however, is not the same for 2009.
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Apr 8, 2011
Im trying to write a routine in VB.net based on Fenton's examples from 'Zero to 3D in 60 Minutes'. the routine uses a filter set to select all 2D polylines in a document then a test is needed for each polyline to establish whether it is a loop, which can then be extruded into a solid or it is a non loop, where the operation will need to be an extruded surface, or if the polyline is a non-loop.
So far my code will pick up every 2D polyline and try and extrude it, but i need to catch the non-looped entities to handle them with an extrude surface method or if self-intersecting polylines, to either drop them and not cause an exception or process them in another way.
What entity attributes or methods should I use to perform testing to establish this loop and non-loop existance of the polylines to achieve this. I work with both C# and VB.net.
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Feb 7, 2013
is there a command or workflow to split all intersecting surfaces? currently we build surface models and split manually or open in autocad, explode, overkill, breakall, then export the lines for rebuilding in an FE package.
Ideally we would like to export straight from inventor with one hit i would like to do the 5 splits below the EOP marker automatically
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Feb 5, 2013
is there a command or workflow to split all intersecting surfaces? currently we build surface models and split manually or open in autocad, explode, overkill, breakall, then export the lines for rebuilding in an FE package.
we would like to export straight from inventor with one hit
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Oct 31, 2013
I have been working on this project for awhile, trying to get it to extrude. The top drawing of the shape is when I created it, still as lines and arcs. The bottom pices are what I have broken it into and joined as polylines for extrusion. The top most piece of these is the one I have been working with, with no solution found. The 3 smallest of these pieces do extrude, but I need all of them to extrude as they are all different heights.
Once this extrusion problem is solved, the rest is just unioning it together and to the rest of my project. I have tried exploding them, overkilling them and joining them again, I have tried the boundary method I have found on forums, nothing is working. I have gone through with a fine tooth comb on the top most section and made sure there wasn't anything extra. I have tried using pedit on it, and many of the commands say you can't do this on a closed polyline. If its a closed polyline, why won't it extrude? I could find anywhere where it was "Self intersecting curves" like the error says when I try to extrude it.
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Apr 9, 2013
I have a rectangular chute, tapering in width and height, and intersecting, at an angle, with a round duct. I can't seem to find a way to determine the cut-out in the round duct.
Because the chute tapers projecting the size onto a flat plane to then project onto the round duct doesn't work.
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Jun 18, 2013
I have a main road corridor and a small access road corridor that intersects the main road. I don't want the intersection to have curb returns because I just want the access road to act as a driveway enterance (main road curb will run straight through and just get depressed at the access road enterance). However, I want the daylighting for the main corridor and the access road corridor to match up at this intersection and I'm not sure how to do this.
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Sep 16, 2011
Lets say you have a polyline snapped perpendicular to an acr and you start zooming in they tend to separate. In the past a simple regen would magically make them display as intersecting lines (no gap or overlap). Right now the regen isn't working and I can't figure out why or what changed. I tried changing the VIEWRES but that didn't seem to work. What else could it be? I don't even have to zoom in that far to notice the overlap.
Infrastructure Design Suite 2014
Civil 3D 2013 sp2
Windows 7 x 64, 16 GB
Intel Xeon @ 2.80 GHz
NVIDIA Quadro K2000
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Jan 7, 2014
I'm trying to find the intersecting points of a part that connects to the outside surface of a cylinder shaped part.
What is the best way to go about this? I have attached some images that hopefully illustrate my problem.
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Apr 27, 2012
I want to create a solid using VB and loft definition.
I creat each time different planes that have a constant distance in x dimension and a steady rotation each time φ (deg).
On each each plane i sketch the same profile and that is happened for 360 deg.
The problem is that Loft is not made because a line of the profile must follow a line tragectory and all other points must follow a circular tragectory. Also, there is a problem from 180 deg to 360 because there is intersection of profiles.
The result must be a solid similar to snail shell but all the same solid, as a cylindar whith a half sphere in the bottom.
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Oct 29, 2010
I need to trim a part that intersects with many other parts in several different sub-assemblies - on an angle.
**Attached is an image of my problem.
Split tool is disabled. It is only usable once I drill down into the assembly/part - it will not select the other cutting objects higher up the browser stack.They become ghosted.
What I need is a tool that projects intersection lines. Does Inventor have something like this? Standard projection lines on the part is not working because the cutting objects are not 90 degrees angled to the part to be cut.
This may be easy,.. I am just not seeing a way to do this with out a bunch of work-a-rounds.
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Jul 12, 2012
I wonder if there is a way to get an intersecting point coordinate of two polylines(lines) programmatically.
For example, like in the below sample picture, I need to get coordinates of the points in the red cycles.
Is there any method that I can easily use?
Could I get a sample code snippet that computes the coordinates? (in C# & ObjectARX 2010 if possible?)
I've looked up "Through the Interface" and this disscussion group. couldn't find any useful yet.
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Jan 3, 2013
Using Conceptual View, I have hanger plates that intersect an arch, and previously where they intersect you couldn't see inside the arch just the surface. Since saving as another drawing to add hangers details something has changed in the display and the arch appears transparent at the moment so you cant see where along the plates the arch intersects.
Unless you zoom right into the intersection, the surfaces appear and zoom out and it goes transparent again.
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Jul 26, 2012
I am looking to create a alignment label style within 2013 that allows me to create a label that looks somewhat like the following:
alignment 1
sta=xx+xx
alignment 2
sta=xx+xx
The label would be used at the intersection of 2 separate alignments.
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Mar 9, 2012
In regards to sweeping, what does the title of the post mean (self intersecting paths or loops are invalid for this operation). I have a 3D sketch consisting of 1 straight line, one spline with 4 points dictated by 'points' and an arc. All have tangential constrains to each other and I am looking to sweep a circle along this path to create a bent wire. I don't have anypictures or files as it is a stand alone computer at the moment.
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Aug 6, 2012
Attached shows lines (Parts) are intersecting each other in drafting mode. I have tried all but I am not able to resolve this issue.
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Apr 23, 2013
We build ASME chambers that have ports and tubes that intersect at various angles. When these tubes intersect at a standard angle, center on I have no problem creating the sheet metal layouts for the tubes. The attached PDF shows one intersecting at two differnet angles, off axis.
he sheet metal layout fo the tube part? I have modeled it pretty well, I just can't figure unfolding the tube portion. The head is a buy out item, we have that.
I have to ascertain two things ultimately, the hole size/layout (easy) and the tube (stumped).
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Oct 8, 2012
I am working on Sweeping three helix profiles around a cylinder to create a screw thread. When I sweep the profile, Inventor gives me the error messages:
"The attempted operation would create a self-intersecting surfaces. Try with different inputs".
or
"The attempted operation did not produce meaningful intersection edges from the face-face intersection. Try with different inputs".
However, this is exactly what I need to create the helix profile I require and eventually increase the size of the Extrusion Sweep profile to 80mm. When I increase the sweep profile to 80mm I get the same error message about the self intersecting surfaces.
I am working with Autodesk Inventor Professional 2011, 64bit, 8gb RAM, Windows 7, Intel Core i7-2860QM.
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May 1, 2012
I always get the message after I make a closed boundary polygon, and I know it's a closed boundary, but I know how to fix it. It just bugs me sometimes when the message pops up when I add it as a boundary under the definition of a surface.
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Dec 18, 2013
Is there a way for the program to automatically change profile elevations of intersecting roads.
Say for example i have two intersecting roads ROAD A and ROAD B.
On my ROAD A profile at station 0+300 i have a proposed road elevation of 9.5
On my ROAD B profile at station 0+000 (intersecting point) I have the same proposed road elevation of 9.5.
Now i change my ROAD A profile at station 0+300 to 10.3
Is there anyway to allow the program to automatically change my ROAD B profile elevations to 10.3
IF NOT--
and I have to use the Annotate > Add Labels > Profile View > .......................... labels,
Is there a way for those labels to link across the profiles such that , On my ROAD A profile at station 0+300 i put the label at the elevation of 9.5
On my ROAD B profile at station 0+000 (intersecting point) I have the same label at the elevation of 9.5
Now i change my ROAD A profile at station 0+300 to elevation of 10.3 then is there a way for it to automatically raise the ROAD B elevation label
So that I would know, without having to manually check through, that there is a discrepancy between those intersecting roads. So the real list of my query is whether I can link my alignments, profiles or annotation labels.
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