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Help in finding the centroid center of a planar surface

Help in finding the centroid center of a planar surface

Help in finding the centroid center of a planar surface

(OP)
Hi all, I need so help. I have called PTC trying to get some help but the techician doesn't understand my needs. Here is the problem. I have a planar sketch that looks like a sharpen pencil. The lines are NOT parallel NOR the corners 90 degrees. I need to find the center of the area and have pro/e position a point there. Some more information, the part contains a solid, the datum sketch mentioned above is a a datum plane 100mm from the solid.


 /----------|   I tried to sketch what the part looks like.
<     *     |    the astrisk is the point I need pro/e to
 \----------|    calculate and position as the shape of
                 pencil changes.

Thanks Texaspete

RE: Help in finding the centroid center of a planar surface

Texaspete,

Use the feature analysis. In the Model Analysis window, choose X-Section Mass Property/or Mass Property Analysis, then choosse a plane to create the section, Compute the results and close the window. Then scroll down the tree sub-window (from the Analysis window) until you will see the RESULT DATUMS. There you can choose CSYS_XSEC_COG (Coordinate system of the center of gravity)and PNT_XSEC_COG (point at the center of gravity) and swicht the values to YES. You'll obtain a CSYS or/and a POINT at the center of gravity.


-Hora

RE: Help in finding the centroid center of a planar surface

(OP)
Hora, I forgot to mention that I am using WF2. This is what is in my model tree, feature 1,2... etc respecfully. datum Right, datum top, datum front, prt_csys, sketch1 (this has the pencil shape), fill 1 (is a flat surface). The end function of the point is the centerline of a different sketch or the first protrusion.
In your post, are you thinking that I have a solid and a plane to intersect? I may have implied that, if so, sorry.

Does this help. texaspete

RE: Help in finding the centroid center of a planar surface

It doesn't matter if you use WF or 2001. You must use the Feature Analysis (a small icon below the PLANES, AXIS, CURVES, POINTS CSYS icons).

The sketch you draw is a section in your solid?

-Hora

RE: Help in finding the centroid center of a planar surface

(OP)
Sorry for the delayed post Hora, I was typing when I got your reply post.
UPDATE - I was looking at the command called "insert,model,datum,analysis" I have never used this, I probably used it in class - 10 years ago. Could this be the command to have Pro/e measure the surface area, find the center-of-the-centroid and place a datum-point there? Then I can place an next datum sketch there to start my first protrusion. My application is this, Duct work, Given outer boundaries (the shape of a pencil) I have to have a curtain amount of area (the created fill-surface) and the point (this is were I need pro/e to help me place the point at the center of the Centriod.
Texaspete

RE: Help in finding the centroid center of a planar surface

pete

Hora's method is the way to go. Unfortunately, Pro/E does not have a command to find the centroid of a flat surface, so the only way to determine it is to create a solid and use the coordinates from the COG.

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