Siemens SINUMERIK 840Di Function Manual page 1610

Detailed Description
2.1 Path feedrate F
Feedrate with transition circle
For more information, please see:
References:
PA/ Programming Guide, Fundamentals
Feedrate for internal radius and external radius path sections
For circular blocks or spline blocks with curvature in the same direction and tool radius offset
activated (G41/G42), the programmed feedrate can act on the center point path or on the
contour (depending on the internal radius or external radius path sections).
A group of G commands is provided for this purpose:
• CFTCP
• CFC
• CFCIN
References:
/PA/ Programming Guide, Fundamentals
Maximum tool path velocity
The maximum path velocity is the result of the maximum velocities of the linear or rotary
axes involved (MD32000 MAX_AX_VELO), i.e., the axis with the lowest maximum velocity
determines the maximum path velocity. This cannot be exceeded.
If G0 is programmed, traversing is at the path velocity resulting from the
MAX_AX_VELO limitation.
Limit velocity for path axes
In addition, the FL[x]=... command can be used to program a limit velocity for path axes
(geometry and synchronized axes).
References:
/PA/ Programming Guide, Fundamentals
This enables separate feedrates to be programmed for the working plane and infeed axis.
This means that a feedrate is specified for both path-related interpolation and for the infeed
axis. The axis perpendicular to the selected machining plane is designated as the infeed
axis. The infeed axis-specific feedrate can be programmed to limit the axis velocity and
therefore the path velocity. No coordinate rotations through frames should be included, i.e.,
the infeed axis must be an axis of the standard coordinate system. This function can be used
to compensate for the fact that a cutter has a lower cutting performance on the face side
than across the cutter circumference.
2-2
Programmed feedrate acting on the center point path.
Programmed feedrate acting on the contour.
Programmed feedrate acting only on the contour with a concave spline.
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Feeds (V1)