Positioning Axis (Posaxis) - Siemens SINUMERIK 840D sl Function Manual

11.2.2

Positioning axis (posAxis)

Positioning axes are programmed together with path axes, i.e. with the axes that are
responsible for workpiece machining.
Instructions for both positioning axes and path axes can be included in the same NC block.
Although they are programmed in the same NC block, the path and positioning axes are not
interpolated together and do not reach their end point simultaneously (no direct time
relationship, see also Section "Motion behavior and interpolation functions").
Positioning axis types and block change
The block change time depends on the programmed positioning axis type (refer also to
Chapter "Block Change"):
Type
1
2
3
Motion synchronization
Positioning axes permit movements to be activated from the same machining program and
such movements to be synchronized at block limits (type 1) or at explicit points by means of
a WAITP command (type 2).
Motion end criterion for block change in the brake ramp
For single-axis interpolation, it is also possible to set another end-of-motion criterion for the
block change in the braking ramp.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
11.2 Own channel, positioning axis or concurrent positioning axis
Description
The block change occurs when all path and positioning axes have reached their
programmed end point.
The block change occurs when all path axes have reached their programmed end point.
With positioning axis type 2, it is possible to approach the programmed end position across
several block limits.
It is possible to set the block change within the braking ramp of the single axis interpolation if
the criteria for the motion end and the block change are fulfilled for the path interpolation.
P2: Positioning axes
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