Traversing Positioning Axes (Pos, Posa, Posp, Fa, Waitp, Waitmc) - Siemens SINUMERIK 840Di sl Programming Manual

Feedrate Control and Spindle Motion

7.2 Traversing positioning axes (POS, POSA, POSP, FA, WAITP, WAITMC)

7.2 Traversing positioning axes (POS, POSA, POSP, FA, WAITP,
WAITMC)
Function
Positioning axes are traversed independently of the path axes at a separate, axis-specific
feedrate. There are no interpolation commands. With the POS/POSA/POSP commands, the
positioning axes are traversed and the sequence of motions coordinated at the same time.
The following are typical examples of positioning axes: pallet feed equipment, gauging
stations or similar.
WAITP enables you to identify a position in the NC program where the program is to wait
until an axis programmed with POSA in a previous NC block has reached its end position.
With WAITMO, the next NC block is loaded immediately when the wait marker is received.
Programming
POS[axis]=...
Or
POSA [axis]=...
Or
POSP [axis]=(...,...,...)
Or
FA [axis]=...
Or
WAITP (axis)=... (programming must be written in a separate NC block)
Or
WAITMC(marker)=...
Parameters
POS [axis]=
POSA [axis]=
POSP [axis]=(,,)
FA[axis]=
WAITP (axis)
WAITMC (marker)
278
Position the axis; the next NC block is not enabled until the position has
been reached
Position the axis; the next NC block is enabled, even if the position has
not been reached
Approach end position in sections. The first value indicates the end
position; the second the length of the section. Approaching the end
position is defined in the third value with 0 or 1
Feedrate for the positioning axis, up to 5 per NC block
Waiting for end of travel of axis. With WAITP, an axis can be made
available for traversing as a reciprocating axis or as a concurrent
positioning axis (by PLC).
During the braking ramp, WAIITMC loads the next NC block
immediately when the WAIT marker is received.
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals