Siemens SINUMERIK 840Di sl Programming Manual page 273

Feedrate F for path axes
The feedrate is specified with address F. Depending on the default setting in the machine
data, the units of measurement specified with the G commands are either in mm or inch.
One F value can be programmed per NC block. The unit for the feedrate is defined in one of
the above G commands. The feed F acts only on path axes and remains active until a new
feedrate is programmed. Separators are permitted after address F.
Example: F100 or F 100 or F.5 or F=2*FEED
Feedrate for synchronized axes
The feedrate F programmed at address F applies to all the path axes programmed in the
block, but not to synchronized axes. The synchronized axes are controlled such that they
require the same time for their path as the path axes, and all axes reach their end point at
the same time.
Traverse synchronized axes with limit speed FL
With this command, synchronized/path axes are traversed at their limit speed FL.
Traverse synchronized axes with path velocity F, FGROUP
With FGROUP, you define whether a path axis is to be traversed with path feed or as a
synchronized axis. In helical interpolation, for example, you can define that only two
geometry axes, X and Y, are to be traversed at the programmed feedrate. The infeed axis Z
is the synchronized axis in this case.
Example: N10 FGROUP(X, Y)
Change FGROUP
1. By reprogramming another FGROUP statement.
2. With FGROUP () without axis parameter
Afterwards, the initial setting in the machine data applies – the geometry axes again traverse
in the path axis grouping.
Note
You must program channel axis names with FGROUP.
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Example: FGROUP(X, Y, Z)
Feedrate Control and Spindle Motion
7.1 Feedrate (G93, G94, G95 or F..., FGROUP, FGREF)
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