Siemens Sinumerik 840D sl Programming Manual page 116

Feed control
8.5 Feedrate for positioning axes / spindles (FA, FPR, FPRAON, FPRAOF)
<axis>:
SPI(<n>)/S<n>:
Note
The programmed feedrate FA[...] is modal.
Up to five feedrates for positioning axes or spindles can be programmed in each NC block.
Note
The derived feedrate is calculated according to the following formula:
Derived feedrate = programmed feedrate * absolute master feedrate
Examples
Example 1: Synchronous spindle coupling
With synchronous spindle coupling, the positioning speed of the following spindle can be
programmed independently of the master spindle, e.g. for positioning operations.
Program code
...
FA[S2]=100
...
Example 2: Derived revolutional feedrate for path axes
Path axes X, Y must be traversed at the revolutional feedrate derived from rotary axis A:
Program code
...
N40 FPR(A)
N50 G95 X50 Y50 F500
...
Example 3: Derive revolutional feedrate for master spindle
Program code
N30 FPRAON(S1,S2)
116
Axis identifier (positioning or geometry axis)
Spindle identifier
SPI(<n>) and S<n> are identical in terms of function.
Spindle number
<n>:
Note:
SPI converts spindle numbers into axis identifiers. The transfer parameter
(<n>) must contain a valid spindle number.
Comment
; Positioning speed of the following spindle (spindle 2) = 100
degrees/min
Comment
; The revolutional feedrate for the master spindle (S1)
must be derived from spindle 2.
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals