# Automatic insertion of polynomials on internal B spline deselection (P-CHAN-00239)

P-CHAN-00239 | Automatic insertion of polynomials on internal B spline deselection
Description | This parameter automatically selects polynomial contouring (G261, #CONTOUR MODE [...]) when the B spline is deselected internally. The B spline #HSC[BSPLINE PATH_DEV=X TRACK_DEV=Y] then adopts the following parameters for polynomial contouring:

#CONTOUR MODE[
DEV
PATH_DEV=X
TRACK_DEV=Y
RELEVANT_PATH=X
RELEVANT_TRACK=Y ]

The exact response of the parameters is described in[PROG//section Polynomial contouring (G260/G261)].

Parameter | hsc.bspline.auto_contour_mode
Data type | UNS32
Data range | 0: Deactivated (default) 1: General insertion of smoothing polynomial if B spline is internally deselected. 2: Insert smoothing polynomial on linear-circular, circular-circular and circular-linear transitions (recommended mode).
Dimension | ----
Default value | 0
Remarks |