Siemens SINUMERIK 840D sl Programming Manual

Further information
Constant feedrate along the contour with CFC
&RQVWDQW
&RQVWDQW
,QFUHDVHG5HGXFHG
The feedrate is reduced for inside radii and increased for outside radii. This ensures a constant
velocity at the tool cutting edge and thus at the contour.
2.7.10 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=... : The path feedrate is programmed under the ad‐
dress F and remains valid during the absence of
an input signal.
Effective: Modal
Fundamentals
2.7 Feed control
NC programming
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Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based