Feedrate For Chamfer/Rounding Frc, Frcm - Siemens SINUMERIK 840D Function Manual

Further information
For further information on the programmable feedrate characteristics, see Programming
Manual NC Programming.
5.4.8

Feedrate for chamfer/rounding FRC, FRCM

The machining conditions can change significantly during surface transitions to chamfer/
rounding. Hence, the chamfer/rounding contour elements require dedicated, optimized
feedrate values to achieve the desired surface quality.
Function
The feedrate for chamfer/rounding can be programmed via NC addresses.
Programming
Syntax:
... FRC/FRCM=<value>
Meaning:
FRC:
FRCM:
<value>:
Note
FRC is only effective if a chamfer/rounding is programmed in the block or if RNDM has been
activated.
FRC overwrites the F or FRCM value in the current block.
The feedrate programmed under FRC must be greater than zero.
FRCM=0 activates the feedrate programmed under F for chamfering/rounding.
Parameterization
Assignment of the chamfer/rounding to the previous or following block
The feedrate type (G94, G95, G96, G961 ... ) and therefore the conversion to the internal format
must be consistent within the block for F and FRC/FRCM. In this context, the following machine
data must be taken into account:
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Non-modal feedrate for chamfer/rounding
Modal feedrate for chamfer/rounding
The feedrate is interpreted according to the active feedrate type:
● G94, G961, G971:
● G95, G96, G97:
Feedrate in mm/min or inch/min or
Revolutional feedrate in mm/rev or inch/rev
V1: Feedrates
5.4 Feedrate control
/min
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