When positioning operations are executed in the XY plane, the Z axis is lifted as far above the workpiece as possible to avoid collision with cut-out parts between cutting operations (G01/G02/G03, M04 laser on, M05 laser off). This is called Smart Collision Guard. The CNC automatically calculates motion of the Z axis between contour elements.


The user can specify a maximum lifting distance to lift the Z axis. Lifting/lowering is executed automatically and across blocks so that the path feedrate in the XY plane is reduced as little as possible and the Z axis reaches the specified target height at the start of the next machining contour.

The path motion is normally not affected by the lifting/lowering motion, i.e. the Z axis can be attached and detached without feed stop (on the path). The Z axis moves with jerk limiting.

The Smart Collision Guard is available in 2 methods.



This document uses the terms lift axis and Z axis synonymously.


Neither of the two methods is activated in the basic setting.

In order to use the recommended Advanced Lifting method, the start-up list parameters described in the section "Parameterisation", P-STUP-00060 and P-STUP-00070 are assigned the value FCT_LIFT_UP_TIME. In addition, the channel parameter P-CHAN-00345 “enable_time_based_lift“ must be set to 1.

For lifting, the P-STUP-00060 parameter must be assigned the value FCT_LIFT_UP . Do not set the channel parameter P-CHAN-00345 "enable_time_based_lift".


The lift range is defined by the two commands Z[LIFT_START...] and Z[LIFT_END]. The lift axis is automatically moved by the lift function in the intermediate motion blocks.



This function is an additional option requiring a license.