Symmetry point help

[[Pe...]]

Have part that has a bunch of teeth.  Need a symmetry point between them to get some angles.

1) Click point on one wall:

2) Second point - I clicked in the center approximate of each plane, but when I do the second point, both points jump.  The first point moves down and the second point moves up so they arent in line anymore.

Step 3)  Click OK - The vectors snap to the nearest base alignment axis.

 

 

So why does symmetry point like to both change the vectors and location of the points im clicking?  Same thing happens if I make a blank symmetry point feature first, then open the strategy and click two points.

[[Ma...]]

For Symmetry point you are defining vector of the resulting feature - similar to symmetry. Here is strategy vector derived from that.
If you don't care about width ( size of this symmetry point ) then just ignore it.

If you really need correct vector, then use ordinary points and symmetry construction. If you need to have exact positions for points, then you can help yourself with using theoretical features and their instersections ( like once circle and then intersections with planes ) - now you will have correct origin for points.

[[To...]]

Touch points, including symmetry points will always snap to the closest primary axis.  At a minimum, you can create a secondary alignment and use the special button to rotate about the Z axis until the plane is normal to X.  Then, select CAD > Pre-assignment for New Features > select the new alignment and leave this window open.  Next, create your symmetry points.  Close and re-open the symmetry point.  Click Strategy.  Double click either of the Probing Points.  Edit the X and Y of each point to zero to make the points directly opposed.  Why the X and Y?  Because the default "Coordinates Relative to" option will be relative to the feature, meaning the Z direction will be along the vector of the 1st point.  In other words, you're looking at feature in the direction of the points.

Because the points are related to the alignment, you can edit the Y and Z values to place the points exactly where you want.

Edited September 25, 2025

[[Ri...]]

Use "Strategy" and you can change the X,Y, Z, Nx, Ny and Nz.

Nx, Ny and  Nz control vectoring.

The example shows two points directly across from each other in a slot that has parallel surfaces.

[[Ma...]]

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As far as i know you can edit only XYZ - vectors can not be changed. Or did something changed from 2018? I've not done with changing to 2024

[[Ri...]]

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I believe you are correct.

[[To...]]

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 Considering the "Coordinates Relative To" is set to Feature, I would challenge that if these points were along the Y axis and directly across from each other, the X and Y values would both be 0.000 and the Z value would reflect the slot width (+.185 and -.185).  Was the screen capture before or after closing the feature and re-opening.

[[Ri...]]

They are across from each other.

[[To...]]

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   Was the screen capture before or after closing the feature and re-opening.  If it was from before, please re-open and show screen capture

[[Ri...]]

Before, so now I stand corrected. The offset values .185 should have been in the Z axis.

I did not check after closing the sym. I assumed I was setup right.  This is what happens when you attend Ass U Med.🤣

Edited September 30, 2025

[[Ky...]]

Without reading this too closely (sorry if someone already mentioned this, but I would probably measure these as individual points and use a symmetry feature. Make sure the measure the points as a space or plane point. You can then probably pattern the points around the part to make the programming easier. 

[[To...]]

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No worries.  I graduated from there many moons ago.  Plus, I often go back for class reunions....lol