Siemens SINUMERIK 840D sl Programming Manual page 511

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Example of oscillation with online change of the reversal position

Setting data

The setting data necessary for asynchronous oscillation can be set in the parts program.

If the setting data are described directly in the program, the change takes effect during

preprocessing. A synchronized response can be achieved by means of a STOPRE

preprocessing stop.

$SA_OSCILL_REVERSE_POS1[Z]=-10

$SA_OSCILL_REVERSE_POS2[Z]=10

ID=1 WHENEVER $AA_IM[Z] < $$AA_OSCILL_REVERSE_POS1[Z] DO $AA_OVR[X]=0

ID=2 WHENEVER $AA_IM[Z] < $$AA_OSCILL_REVERSE_POS2[Z] DO $AA_OVR[X]=0

OS[Z]=1 FA[X]=1000 POS[X]=40

The following apply to the oscillating axis:

• Every axis may be used as an oscillation axis.

• Several oscillation axes can be active at the same time (maximum: the number of the

• Linear interpolation G1 is always active for the oscillating axis – irrespective of the

The oscillating axis can

• act as an input axis for a dynamic transformation

• act as a guide axis for gantry and combined-motion axes

• be traversed

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Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0

positioning axes).

G command currently valid in the program.

– without jerk limitation (BRISK) or

– with jerk limitation (SOFT) or

– with acceleration curve with a knee (as positioning axes).

11.1 Asynchronous oscillation

;If the actual value of the oscillation

;axis has exceeded the reversal point,

;the infeed axis is stopped.

;Switch on oscillation

;Switch off oscillation