(as a minimum for area positioning the laser scanning head)
and movement inside laser scanning head (rotation of
mirrors). Performing laser machining requires two types
of CNC movements. The first type of movements is
implemented by servo drives and controlled directly
from the CNC interpolator. Movements of the second
type are movements of the laser beam directly in the
treatment area, and they are implemented with the
system of deflection of the laser beam. The proposed
approach involves organizing the control of deflector
from a special device - an external module control that
has the same interface as the CNC kernel interpolator,
but delegates the direct traffic control to an external
device (for example, to the controller of deflector) [15].
It is a software-hardware device, which performs the
laser processing part of the flow program. According to
the target linear movements and laser scanner head
movements can be performed separately or
simultaneously. In the second case the synchronisation is
done on the level of microinstructions, The
microinstructions are generated by the external
interpolator, which has to define the execution time of
each trajectory segment (see below microinstructions of
motion control).