Positioning commands in the workpiece coordinate system (WCS)

Programming is realized by specifying position interpolation points in the WCS and the orientation in the MCS or WCS (depending on the transformation type, RTCP transformation -> MCS, complete transformation -> orientation vector).

The deviation tolerance for interpolation of the orientation between the orientation interpolation points is generally greater than the position tolerance. The orientation can therefore be smoothed to a greater extent. When this method is applied, no large-scale errors are to be expected from smoothing the contour description by means of processes 1 - 4 because the tool compensation motions are calculated online in the NC by means of kinematics transformation.

For machining with constant orientation, use can be made of the CNC's internal tool radius compensation as in the case of 2.5D machining. Otherwise, 3D tool geometry compensation must be realized by the CAD/CAM system.

Example:

N05 #KIN ID[9] 
N10 #TRAFO ON 
N15 #HSC ON [OPMODE 1 CONTERROR 1] 
N20 G01 F10 
N30 X100 Y100 Z100 A20 B15 
............(Contour/orientation description in the WCS/MCS) 
N1998 #HSC OFF 
N1999 #TRAFO OFF 
N2000 M30