Hello,

How could I us relations to center this circle on the extruded box face ? in other words, is there another way to center the circle without using dims?

Thanks in advance.

Ali

How could I us relations to center this circle on the extruded box face ? in other words, is there another way to center the circle without using dims?

Thanks in advance.

Ali

thanks,

Or use a center rectangle and put the origin in the center of the box, then you can base the circle off the origin.

If you define the hole center with dims from the edge, that is where it stays, relative to those edges.

Just a thought.

Add a construction line diagonally to the square and constrain the center of the circle to the midpoint of the construction line.

Constrain the center of the circle to the midpoints of the square using horizontal and vertical.

Draw two construction lines from the midpoints of two of the sides of the square till they meet in the center then constrain the center of the circle to the intersection of the two construction lines.

*Edit - If you created the square where the origin is the center of the squre you could just constrain the center of the circle to the origin - one constraint.

Troy, how coudl I do that? if i highlight teh circle and anyone of the square edges it only shows me a tangental relation.

Thanks,

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troy,

I just cann;t see the vertical and horizontal relations. I highligh both the circle and the edge (sometimes i pick the circle from teh origin and sometimes from its edge) and i still cann;t see those two relations. i must be doing something wrong.

Thanks,

nevermind i think i coudln;t see them because the origin of my square/box is not in the center, but its off to one of teh corners.

Thanks

case closed.

Anyway - as an added possibility, you can create a Reference Geometry -> Point, which has the option "Center of Face". Particularly useful for extravagant shapes whose center is not easily determined by a simple construction line or two.

May be the best way or fastest way to place a circle at the centre point of a rectangle plate is

click the centre point of circle then drag it to the one edge of the rectangle, it will show the mid point of the edge ... then drag the circle point to that mid point of edge and mid point relation(of auto snap option) will appear,

then drag the circle perpendicular to the edge and then go to second edge and do as above.

now move the point to the middle automatically 2 refference line from the edges appear which merge at a point and that will be the centre point of rectangle.

please see the jpeg images for better understanding.

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Pilun... you mirrored my thoughts exactly.Ali... you do not have to actually apply a constraint. After drawing the diagonal, simply start drawing the circle by placing its centre at the midpoint of the diagonal.You can do it, however, by right-clicking the edge and from the menu "Select midpoint" and then clicking the circle centre - horizontal or vertical and even coincident join fix in the possible relationships. Cool!

Tricky?

RMB - "Select Midpoint"

My personal preference is to center using the intersection of two centerlines constrained symmetric to the sides of the square. This method is most robust, and would withstand the most variation in geometry and still hold the geometric center of the four-sided shape.

Do you have the

Automatic RelationsandSnappingfunctions enabled?## Attachments