Several Feedrate Values In One Block (F, St, Sr, Fma, Sta, Sra) - Siemens Sinumerik 840D sl Programming Manual

Feed control

8.10 Several feedrate values in one block (F, ST, SR, FMA, STA, SRA)

Further information
Constant feedrate on contour with CFC
8.10 Several feedrate values in one block (F, ST, SR, FMA, STA, SRA)
The "Multiple feedrates in one block" function can be used to activate different feedrate values
for an NC block, a dwell time or a retraction motion-synchronously, dependent on external
digital and/or analog inputs.
Syntax
Path motion
F=... F7=... F6=... F5=... F4=... F3=... F2=... ST=... SR=...
Axial motion:
FA[<Ax>]=... FMA[7,<Ax>]=... FMA[6,<Ax>]=... FMA[5,<Ax>]=...
FMA[4,<Ax>]=... FMA[3,<Ax>]=... FMA[2,<Ax>]=... STA[<Ax>]=...
SRA[<Ax>]=...
Meaning
F=... :
126
The feedrate is reduced for inside radii and in‐
creased for outside radii. This ensures a con‐
stant speed at the tool edge and thus at the
contour.
The path feedrate is programmed under the ad‐
dress F and remains valid during the absence of
an input signal.
Effective: Modal
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals