Feedrate For Positioning Axes / Spindles (Fa, Fpr, Fpraon, Fpraof) - Siemens Sinumerik 840D sl Programming Manual

Feed control

8.5 Feedrate for positioning axes / spindles (FA, FPR, FPRAON, FPRAOF)

WAITS can be used after M5 to wait until the spindle(s) has (have) stopped. WAITS can be
used after M3/M4 to wait until the spindle(s) has (have) reached the specified speed/direction
of rotation.
Note
If the spindle has not yet been synchronized with synchronization marks, the positive direction
of rotation is taken from the machine data (state on delivery).
Position spindle from rotation (M3/M4)
When M3 or M4 is active, the spindle comes to a standstill at the programmed value.
There is no difference between DC and AC dimensioning. In both cases, rotation continues in
the direction selected by M3/M4 until the absolute end position is reached. With ACN and ACP,
deceleration takes place if necessary, and the appropriate approach direction is taken. With
IC, the spindle rotates additionally to the specified value starting at the current spindle position.
Position a spindle from standstill (M5)
The exact programmed distance is traversed from standstill (M5).
8.5 Feedrate for positioning axes / spindles (FA, FPR, FPRAON,
FPRAOF)
It is also possible to derive the revolutional feedrate for path and synchronized axes or for
individual positioning axes/spindles from another rotary axis or spindle.
Positioning axes such as workpiece transport systems, tool turrets and end supports are
traversed independently of path and synchronized axes. A separate feedrate is therefore
defined for each positioning axis.
A separate axial feedrate can also be programmed for spindles.
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Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals