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

Feed control

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. The POS/POSA/POSP commands are used to
traverse the positioning axes and coordinate the motion sequences at the same time.
The following are typical examples of positioning axes:
• Pallet feed equipment
• Gauging stations
WAITP can be used 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 reaches its end position.
WAITMC loads the next NC block immediately when the specified wait marker is received.
Syntax
POS[<axis>]=<position>
POSA[<axis>]=<position>
POSP[<axis>]=(<end position>,<partial length>,<mode>)
FA[<axis>]=<value>
WAITP(<axis>) ; Programming in a separate NC block.
WAITMC(<wait marker>)
Significance
POS/POSA:
118
Move positioning axis to specified position
POS and POSA have the same functionality but differ in their block change
behavior:
• POS delays the enabling of the NC block until the position has been
reached.
• POSA enables the NC block even if the position has not been reached.
Name of the axis to be traversed (channel or geometry
<axis>:
axis identifier)
Axis position to be approached
<position>:
Type: REAL
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals