# 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 smoothing (G261, #CONTOUR MODE [...]) when the B spline is deselected internally. The following B spline parameters #HSC[BSPLINE PATH_DEV=X TRACK_DEV=Y] are adopted for polynomial smoothing:
#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 smoothing (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 |