Siemens SINUMERIK 840D sl Programming Manual page 518

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11.2 Control oscillation via synchronized actions

You can implement the following functions with the language resources described in detail

1. Infeed at reversal point.

2. Infeed at reversal area.

3. Infeed at both reversal points.

4. Stop oscillation movement at reversal point.

5. Restart oscillation movement.

6. Do not start partial infeed too early.

The following assumptions are made for all examples of synchronized actions presented

• Reversal point 1 < reversal point 2

• Z = oscillating axis

• X = infeed axis

Assign oscillating and infeed axes as well as partial and complete infeed

Infeed in reversal point range

The infeed motion must start within a reversal area before the reversal point is reached.

These synchronized actions inhibit the infeed movement until the oscillating axis is within the

reversal area.

The following instructions are used subject to the above assumptions:

Reversal point range 1:

WHENEVER $AA_IM[Z]>$SA_OSCILL_RESERVE_POS1[Z]+ii1 DO $AA_OVR[X] = 0

greater than

Reversal point range 2:

WHENEVER $AA_IM[Z]<$SA_OSCILL_RESERVE_POS2[Z]+ii2 DO $AA_OVR[X] = 0

For more details, see the "Motion-synchronous actions" section.

the current position of oscillating axis in the MCS is

the start of reversal area 1

set the axial override of the infeed axis to 0%.

the current position of oscillating axis in the MCS is

the start of reversal area 2

set the axial override of the infeed axis to 0%.

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

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