Least Square Axis Move

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Least Square Axis Move

The lsqaxis_mv_24 Least Square Axis move is used to create an axis based on multiple center points. This move is unique to the DCS move library in that it does not move a part but it moves points. It is actually more like a DCS tolerance routine. This routine was specifically developed to support Virtual Clearance measurement but can be used to support any other DCS Move, Tolerance or Measurement routine.

 

 

See Also:

Applying Moves

Common Parameters

 

 

 

 

Inputs:

•Object point 1: A point that will be moved to one end of the Least Square Axis.

•Object point 2: A point that will be moved to the other end of the Least Square Axis.

•Target Centerline Points 2 … n: Hole/pin centerline points used to calculate the Least Square Axis.

 

Outputs:

Using the input target center line points, the routine calculates an axis using the least squares method. Based on the two target points farthest apart, the intersection of the new axis and the surface of the two target points, is determined. The object points are moved to these two calculated points.

 

 

leastsqaxissection

 

Notes:

•The target points can be on one part or multiple parts.

•This move assumes the target points are arranged in sequential order along a vector (but not necessarily collinear.)

•This move assumes the first and last target points have associated vectors parallel to the nominal least-squares axis of the target points.

•This move assumes the object points are not dynamic points.