Path Feedrate F - Siemens SINUMERIK 840D sl Function Manual

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V1: Feedrates

17.2 Path feedrate F

● Via the PLC

● Per program command

Path feedrate F

The path feedrate represents the geometrical total of the speed components in the participating

axes. It is therefore generated from the individual motions of the interpolating axes.

The default uses the axial speeds of the geometry axes which have been programmed. The

FGROUP command can be used to include other geometry and/or synchronized axes in the

calculation of the path feedrate.

The path feedrate F determines the machining speed and is observed in every type of

interpolation even where allowance is made for tool offsets. The value programmed under the

address F remains in a program until a new F value or a new type of feedrate is programmed.

Range of values for path feedrate F

See Description of Functions G2: "Speeds, Setpoint / Actual Value Systems, Closed-Loop

Control", Section: "Velocities (Page 317)".

F value at PLC interface

The F value of the current path feedrate is always entered in the channel-specific PLC interface

for auxiliary functions (DB21, ... DBB158 to 193).

For explanations about the associated interface signals (change signal, F value), see

Description of Functions "H2: Auxiliary function outputs to PLC (Page 377)".

Feedrate with transition circle

Programming Manual, 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).

Function Manual, 01/2015, 6FC5397-0BP40-5BA2

Basic Functions

Sinumerik 828d Sinumerik 840de sl