Linear Feed (G94); Inverse-Time Feed (G93) - Siemens Sinumerik 840D sl Programming Manual

Example
$SC_FIXED_FEEDRATE_F1_F9[0] = 1500.0
$SC_FIXED_FEEDRATE_F1_F9[1] = 550.0
N10 X10 Y10 Z10 F0 G94
N20 G01 X150 Y30 F1
N40 Z10 F0
Note
While macroprogramming with G65/66, the programmed value for the address F is always
stored in the cycle system variable. For F1 to F9, for example, the value 1 to 9 is entered in
the cycle system variable $C_F. The address signifies a transfer variable here and has no
direct reference to the feed.
The same is true of the thread lead programming in G33 - G34 with the address F. No feed
is programmed with F here, instead the distance between two threads during a spindle
revolution.
In cycle programming (e.g., G81 X.. Y.. Z.. R.. P.. Q.. F..), the feed is always programmed
under the address F. In a part program block with a cycle call over a G function (G81 - G87
etc.), the corresponding feed value during the programming of F1 to F9 is written from the
corresponding setting data in the variable $C_F.
Restriction
In the ISO dialect mode, the feed values are changed in the setting data with a handwheel.
In the Siemens mode, the feeds can be influenced only like a directly programmed feed, e.g.
through the override switch.
1.2.4

Linear feed (G94)

On specifying G94, the feed given after the address character F is executed in the mm/min,
inch/min or degree/min unit.
1.2.5

Inverse-time feed (G93)

On specifying G93, the feed given after the address character F is executed in the 1/min
unit. G93 is a modally effective G function.
Example
N10 G93 G1 X100 F2 ;
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
;Positioning with 1500
;Feed 550 mm/min active
;Positioning with 1500
Principles of programming
1.2 Preconditions for the feed
15