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Symmetricity

I need to find Symmetricity of to ends DClin2 and DClin3 with reference to Datum-D. So first I constructed mid Lin of DC lin2 and DC lin3. They are 103 mm.distance away from each other. I don’t know wheather hole can be considered directly as a Datum D. If not, I would construct a vertical line passing through hole Datum D just like DC lin2 and DClin3. And consider this construct line as a Datum D. In this condition I may need Lin vector and surface vector to construct line. I would consider line vector 0,1,0 and surface vector 0,0,1. Do I have to change work plane to construct this line? If yes, would it be -x work plane? Because it is located 51.5 mm from origin and x coordinate remain same.

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  • I know how to construct circle and plane from points or circle from pattern of holes, but this would be a plane that needs to be created from hole (Datum-D) and it should be parallel to DClin2 and DClin3. Is it very complicated? Could someone please give me hint how it can be created?
  • Create an alignment that levels to your datum D cylinder,rotates to the width feature and origins on the datum D cylinder. Then go to INSERT>FEATURE>CONSTRUCTED>PLANE, select ALIGNMENT from the "Method" drop down list and hit create. In Command Mode, look for the command in the edit window and edit the "WORKPLANE" field to the required axis (XPLUS, YPLUS or ZPLUS)...

    PLN1       =FEAT/PLANE,CARTESIAN,TRIANGLE,NO
                THEO/<0,0,0>,<0,0,1>
                ACTL/<0,0,0>,<0,0,1>
                CONSTR/PLANE,ALIGN,WORKPLANE.........< Change "WORKPLANE" to the relevant axis​
    
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  • Create an alignment that levels to your datum D cylinder,rotates to the width feature and origins on the datum D cylinder. Then go to INSERT>FEATURE>CONSTRUCTED>PLANE, select ALIGNMENT from the "Method" drop down list and hit create. In Command Mode, look for the command in the edit window and edit the "WORKPLANE" field to the required axis (XPLUS, YPLUS or ZPLUS)...

    PLN1       =FEAT/PLANE,CARTESIAN,TRIANGLE,NO
                THEO/<0,0,0>,<0,0,1>
                ACTL/<0,0,0>,<0,0,1>
                CONSTR/PLANE,ALIGN,WORKPLANE.........< Change "WORKPLANE" to the relevant axis​
    
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