Akima spline

The Akima spline curve runs through the programmed interpolation points and has a constant tangent within the contour. Contrary to all other processes, in the case of the Akima spline the user can define how the curve is entered and left. To define the transition to the spline zone, either the approach/exit block into/out of the spline zone is used or the user can specify the direction by explicitly specifying the tangent vector.

Akima spline 1:
Figure 1-8: Closed spline contour

Programming

Example: Selecting the Akima spline with a tangential transition out of the approach block and into the exit block.

N01 G00 X-10
N02 #SET SPLINETYPE AKIMA 
N03 #SET ASPLINE MODE[2 ,2] 
N04 #SET SPLINE ON 
N05 G01 G01 G90 X0 F10000
....................(Further contour description)
N1998 X0
N1999 #SET SPLINE OFF 
N2000 X10