Siemens SINUMERIK 828D Programming Manual page 462

Path traversing behavior
8.2 Feedrate response (FNORM, FLIN, FCUB, FPO)
F=FPO(...,...,...)
The feed characteristic is programmed directly via a polynomial. The polynomial coefficients
are specified according to the same method used for polynomial interpolation.
Example:
F=FPO(endfeed, quadf, cubf)
endfeed, quadf and cubf are previously defined variables.
endfeed:
quadf:
cubf:
With an active
block beginning and block end.
Restrictions
The functions for programming the path traversing characteristics apply regardless of the
programmed feed characteristic.
The programmed feed characteristic is always absolute regardless of
Feed response FLIN and FCUB are active with
G93
FLIN
G95
462
Feed at block end
Quadratic polynomial coefficient
Cubic polynomial coefficient
, the spline is linked tangentially to the characteristic defined via
FCUB
and .
G94
and is not active with
FCUB
, and
G96/G961 G97/G971
.
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
at the
FPO
or .
G90 G91
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