Motion Sequence For Interrupt Routines - Siemens SINUMERIK 840D sl Programming Manual

Nc programming

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The "fast retraction" function is deactivated with ALF=0.

Risk of collision

When the tool radius compensation is activated, then:

● For G41 codes 2, 3, 4

● For G42 codes 6, 7, 8

should not be used, as in these cases, the tool would move to the contour and would collide

with the workpiece.

Code numbers with traversing directions for LFWP

For LFWP, the direction in the machining plane is derived from following assignment:

● G17: X/Y plane

ALF=1: Retraction in the X direction

ALF=3: Retraction in the Y direction

● G18: Z/X plane

ALF=1: Retraction in the Z direction

ALF=3: Retraction in the X direction

● G19: Y/Z plane

ALF=1: Retraction in the Y direction

ALF=3: Retraction in the Z direction

Motion sequence for interrupt routines

Interrupt routine without LIFTFAST

Axis motion is braked along the path down to standstill (zero speed). The interrupt routine then

The standstill position is saved as interrupt position and is approached at the end of the

interrupt routine for REPOS with RMIBL.

Interrupt routine with LIFTFAST

Axis motion is braked along the path. The LIFTFAST motion is simultaneously executed as

superimposed motion. If the path motion and LIFTFAST motion have come to a standstill (zero

speed), the interrupt routine is started.

NC programming

Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

Work preparation

3.3 Interrupt routine (ASUB)

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Sinumerik 840de sl