## Manual

### Manual

##### 5.13.10.1.1. Set Connection point

For the placing of electrical engineering components in CAD the following shall apply:

• The Connection point is in left below edge of bounding box of part (smallest possible enclosing cuboid with alignment along X,Y,Z axes).

• All axes of coordinate system are positive and Z axis point is oriented upwards (as in first octant).

Imagine the 3 dimensional space divided in 8 octants: The 1. octant (I) consists of points where all have three positive coordinates x,y,z. I. Octant has positive x,y and z axis Connection point at left, lower, back edge of bounding box

In order to get a proper placement of part in most cases it will be necessary to shift the part along X, Y and Z axis.

You can realize shift and rotation via dialog Fixed plane.

The following exemplary figure shows a part where the orientation is correct (Z upwards), so that only a shift has to be performed (see entries under Base point). As the Z axis shows upwards, no rotations of axes have to be performed. The input fields under X axis retain the default values 1,0,0. The input fields under Y axis retain the default values 0,1,0. The Base point of absolute plane is in the left, lower, back edge of the bounding box.

The connection point can be set with Angle 0, as no rotation is necessary or rotations are realized via plane.

 Note The name of connection point can freely be chosen (in this example "CP_Orientation").

The coordinates of connection point under "Position" can be left at 0,0, so that the connection point is in the Base point of plane. Set connection point

 Note Alternatively, a needed shift can also be performed here in the sketch instead via dialog Fixed plane -> Base point.

For parts with wrong orientation you have to perform respective adjustments in the dialog Fixed plane under X axis and Y axis.

After transformation (rotation + shift) applies:

• The x axis of connection point is the new x axis.

• The y axis of connection point is the new y axis.

• The z axis of connection point is the new z axis.

Example with rotation: The transformation happens with 2 rotations.

The original X axis is mapped to the Z axis (Z=1) and then the original Y axis to the X axis (X=1). Original coordinate cross and newly oriented coordinate cross of connection point

Result in E3 Model Properties - Correct orientation of axes and marked connection point

###### Check via PS3 file

In an exported PS3 file you can check orientation and shift of connection point:

• Example 1 (no rotation of axes): In marked area you can see the definition for X, Y and Z axis.

x axis is mapped to x axis, y axis is mapped to y axis, z axis is mapped to z axis.

The lowest line shows the shift in direction of x, y and z axis.

• Example 2 (with rotation of axes): x axis is mapped to the negative z axis, y axis is mapped to the y axis, z axis is mapped to the x axis.

The lowest line shows the shift in direction of x, y and z axis.

Now the Connection point has to be classified.