AutoCAD Inventor :: Center Of Gravity Of Surface Models Or Mesh Features?
Apr 29, 2013
Ok received parts from a customer. It was ALL mesh features.I converted some of them(the mesh features) to Solids. Some would not convert to solids (converted to surfaces).
I need to have the COG show up correctly. Yes, I have a physical COG. I know where it is supposed to be.
I am trying to use this and several other parts (with mixed, Solids, Surfaces, Mesh features), in an assembly AND balance it all thru a common lift point.
How can I correct the COG of the individual parts, so that the assembly is correct.
I have work planes for the corrected COGs, but I am afraid that I will need to calculate the new COG for the assebmly.
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Mar 29, 2013
I can obtain the Center of Gravity of a sub-assembly. What are the values with respect to? The origin/root of the whole assembly or the origin of the sub-assembly? How can I obtain the coordinate of the COG of a sub-assembly with respect to its origin or with respect to the whole assembly's origin?
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Jun 11, 2012
How do I get the center of gravity to work, by measuring a distance from the origin like Solidworks? I select the “Physical” Tab under the iProperties “Center of Gravity” and it gives me” lbmass”? Also is there a way for it to show on the screen?
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Sep 22, 2010
I have a LOD in my assembly to suppress some of the components. In the assembly, it looks like the center of gravity is correct for the LOD. Now I place this assembly in an idw with the LOD active. Now I right-click on the assembly in the idw and choose "Center of Gravity". The center of gravity shown here does not represent the center of gravity for this LOD. The CG shown represents the CG of the master LOD.
Is it possible to get the center of gravity to show on the idw that represent the CG of an LOD?
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Apr 11, 2012
Structural shape authoring has a parameter mapping for the center of gravity. What values should these be for a C channel where the part origin is at the geometric center and the center of gravity is located along the negative X axis? I checked one of the channels in content center - it had the origin located at the center of gravity and the parameter mapping was the distance to the outer web surface (positive), with the web located in the negative X direction.
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Oct 21, 2011
How can see visually the center mass of a part or assembly?
When I'm checking in the Iprop., I see the center of gravity coordinates, but it there a way to "see" it (some visual representation)
Inventor 2012 Pro.
I7 workstation
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Mar 22, 2013
For some reason it will not let me constrain a part to the center of gravity plains. I would like to constrain lifting lugs to the center of gravity so the model will automatically update itself. Is there anyway to make this work (using ilogic or anything)?
Why would Inventor tease me with showing me the center of gravity plains in an assembly but making them completely useless?
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Sep 22, 2013
I have created assembly (lets call it main assembly) in which there are 4 other assemblies (lets call them sub assemblies).
Now in the main assembly document i want to display center of gravity of each of the sub assembly.
When i open each of the sub assemblies and turn on center of gravity of each of them, when returning to main assembly view it displays center of gravity of main assembly, not of each of the sub assemblies.
Im asking for this because i want to create a drawing of main assembly and add dimensions of each of the sub assembly centers of gravity and unfortunatly just as in assembly view, when i want to display center of gravity i can do it only for the main assembly not for each of sub assemblies.
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Oct 21, 2011
I am currently trying to show a comparison of Center of Gravity between two assembly's. One is the original state and the other has counter weight bars. I know how to get the COG to show on my drawings, but both COG locations are the same in my drawings (but different in my assembly) My problem is when I create View Representations and I toggle the Counter Weight bars off, the COG in my drawing still remains in the same location as if they were still on. I know the hard way of accomplishing my task would be to save 2 seperate models (one with Counter Weights and one without). But I would like to take full advantage of the Representation Option. Using IV 2012 Pro.
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Dec 20, 2010
How on earth do you show the COG on a drawing in inventor 2011?
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Mar 19, 2012
I am trying to retrieve center of gravity in my assembly, I now already coordinates given by iporoperties, now i want to measure to that specific point, is it possible to do it? or to actually show the center of gravity in the assembly?
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Aug 27, 2013
I am trying to apply a load lengthwise on a 2 x 2 x 3/16 angle at the center of gravity using "stress analysis" in inventor pro 2014, but it won't let me apply the load at this point. I know that the load would be floating in the air at the center of gravity, could this be the issue?
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Aug 1, 2013
I am trying to pinpoint the center of gravity on a curved face of an assembly. I can use the c og G command to get the true center of gravity but i would like to incorporate lifting eyes into the finished assembly. Basically I need to know how to find the C of G on a given surface. I have attached the assembly I am working on and added lifting eyes roughly where I would like them. I have tried measuring from the C of G to a face and then creating the lug above the C of G but somehow it doesn't line up.
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Dec 27, 2013
In the iProperties, in the Mass properties are the coordinates of the center of gravity. i guess they relate to the center point and axes in the main origin folder, right?
How can i show and measure from the genter of gravity symbol in parts and drawings?
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May 8, 2012
I'm trying to build a VBA code in inventor 2010 to export the Center of gravity coordinates (X,Y,Z) from an inventor assembly to an excel sheet.
But I'm not able to get the iproperties for the COG from my assembly.
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Dec 22, 2012
is it possible in AUTOCAD to know the CENTER OF GRAVITY OF A VEHICLE?
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Dec 19, 2012
I trying to use the content center feature in a part on Inventor 2013 but it doesn't work.
It does work on Inventor 2012.
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Jul 19, 2012
I have tried just about everything and the mass properties center point of gravity is coming out incorrect.
I have created a box 300x300x300 with the center of the box at 0,0,0 (for testing the cg) . The result I get is not 0,0,0 one of the values always comes out to be not zero, depending on the orientation of the box. Is this a bug?
Dim cg As Point3d = T.MassProperties.CentroidMsgBox(cg.X & vbCr & cg.Y & vbCr & cg.Z)
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Dec 22, 2004
Is there a command within AutoCAD2000 to establish the centre of gravity of a solid or solids?
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Dec 5, 2012
I have a dwg file of a section of a tunnel that has been exported from Microstation as a polyface mesh surface. What I am trying to achieve is cutting a hole into the surface. I am assuming that I cannot cut a surface directly, but need to convert it to a solid first.
I've searched this site and I have tried everything I can think of to no avail. Inventor does not seem to be able to convert the surface to a solid. Also, when I import the surface to Inventor, some of the triangular meshes are not there, and there are too many "holes" to patch them manually. I've also tried using lisps in AutoCAD, but on the surface and 3D faces after exploding it, but for example m2s.lsp or f2s.lsp do not seem to work.
I have also had the same file exported from Microstation as ACIS .sat, but version 18.0 is not readable by Inventor. Is there a way to convert the ASCII file to an older version?
I am using Inventor 2013, and I also have AutoCAD 2013 available.
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Oct 6, 2011
We are looking for a workflow example of developing casting models into machining models.
Typically our castings are made from different materials (Fig-1) and then machining (Fig-2) are created from these castings.
Is creating the casting as an iPart (with different materials) and then deriving the machining from the casting the proper method?
Doing it this way seems to force us into making a machining for each casting material instead of just one machining that is an iPart. How should this be set-up for BOM purposes and for use with Vault (Base Version)?
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Sep 3, 2012
Is there any way to set features to be invisible when create sketch after those 3D features so as to make the sketch more easy to see?
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Apr 5, 2013
I'm just starting a new project. I've started the skin with a mesh fill. I'm wondering, what is the best way to handle the facial features. Vector blends etc or more individual mesh fills. If I do individual vector objects, what's the best way to blend features with the mesh skin?
Below you can see what I have so far.
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Aug 30, 2012
I can not change coordinate systems of Surface models and COGO points. Why?
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Apr 9, 2012
I have an assembly that has somewhere a hole with a round bar that exactly fits in this hole. But when meshing the assembly, the mesh of the hole and the mesh of the bar are different.
The result is that the different parts do only seem to touch each other at the edges of the mesh, resulting in high stresses.
See picture.
I tried to made a derived part from the assembly, but that one does not finish meshing. After 48 hours, the progress bar is still half way. While the one above did finish in about 15 minutes. What can I do to make the meshes match?
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Jun 27, 2012
Often we build a design surface from feature lines and possibly a grading or two. Then we cut sections.
Now, for set out, and especially for smaller contractors who don't have fancy survey gear, it would be really nice to be able to show design surface levels in section bands BUT ONLY AT THE SURFACE-DEFINING FEATURE LINE LOCATIONS.
I am aware that we can use grade breaks...but this gives us band data at each triangle intercept which is too much data. We can weed this data, but that is indiscriminate and I really need only the data at the surface-defining geometry points (feature line locations.)
We can also use station/elevation labels on the section views but this is time-consuming and non-dynamic. Band labels are dynamic and more or less automatic...if only we could get the discrete locations we need labelled.
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Oct 30, 2012
Is this type of gravity experiment possible with dynamic simulation?
[URL].........
I made the cone ramp and double cone but the cone either goes the wrong way or only moves a few inches in the correct direction and then gets stuck. I’m using 3D Contact Joints and Spatial Joints and Gravity Force.
Version = Inventor Pro 2009
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Oct 16, 2012
I've got a fairly complicated polygon mesh that I turned into a mesh. No problem. Then I try to convert to a surface and while the geometry is accurate the isolines change dramatically. I'm trying to bring the item into Inventor so that I can have a clean surface to work from. Unfortunately I get what you see in the picture. The top left is before converting to a surface. Bottom right is after.
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Oct 8, 2013
How to drape OS Mastermap/DWG over Profile DTM Surface Mesh? I've been trying for hours and can't get it to work. I've looked at articles online and they are hardly any use as they show you how to do it properly.
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Jun 25, 2011
I'd like to be able to create a surface or mesh from contour lines to give a better 3D representation of terrain than just contour lines. "Drape" seems to be the tool ACA, but I'm wondering if AutoCAD can do something similar. LOFT sorta works, but even then, I have to do it in sections, and I'm not really looking for a solid.
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Aug 2, 2012
I have created a TIN (triangulated irregular network) of an existing survey in my terrain modelling software (12d Model). I am able to export (save-as) the TIN as 3D Face Triangles for opening in AutoCAD (2012) or similar.
My ultimate goal is to create a solid surface in Inventor. The surface has to be seemless (stitched) in order for me to create a new sketch and extrude to this surface. Finally giving me a part in Inventor that represents my ground. I would then want to use the same process to bring into Inventor all other Civil Design works created in 12d Model such as roads, earthworks platforms (including dams) etc.
I've tried stitching (Inventor and Microstation) without success. Inventor keeps crashing and Microstation looses data. AutoCAD (2012) won't let me create a polyface mesh from 3D Faces. I tried doing a mesh, surface union without success. Programs either crash or data is lost.
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