Aligning UCS to an Object

Aligning UCS to an Object

Ribbon: View – Coordinates > Object
Menu: Tools – Coordinate system > Object
Command line: SETUCSBYOBJECT

The command specifies the new position of the coordinate system origin for the current UCS; the direction of the axes is specified according to the geometry of the current object. The extrusion direction of the selected object specifies the positive direction of the Z axis for the new UCS.

Rules to create UCS, aligned to an object:

_.Line		The origin of the new UCS is set at the line end which is closest to the selection point. The X axis is used to place the line in the XZ plane. The Y coordinate of the second end of the line is zero in the new UCS.
Arc		The origin of the new UCS is the center of the arc. The X axis is set at the end of the arc which is closest to the selection point.
Circle		The origin of the new UCS is the center of the circle. The X axis is set at the selection point.
Point		The origin of the new UCS is the selection point.
Polyline		The origin of the new UCS is the start point of the polyline. The X axis is set at the start point and the nearest polyline vertex.
Dimension		The origin of the new UCS is in the middle of the dimension text. The new X axis is set parallel to the X axis of the UCS used to specify the dimension.
Text block insertion, attribute definition		The origin of the new UCS is the insertion point of the object and the direction of the X axis is set by the angle of object rotation around the direction of extrusion. The object used to set the new UCS has a zero-rotation angle in this UCS.

Command prompt:

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