# Relating the reserved distance for time preview to contour (P-CHAN-00340)

P-CHAN-00340 | Relating the reserved distance for time preview to contour.
Description | The time preview function permits the calculation of the time required by the CNC to travel a certain distance (P-CHAN-00307) taking into consideration the current velocity profile. In the basic setting, the specified distance refers to the tool centre point path. By setting this parameter, the path of the tool engagement point is related to the contour for the time preview.
Parameter | position_lookahead_contour_path
Data type | BOOLEAN
Data range | 0/1
Dimension | -
Default value | 0
Remarks |