Velocities (F-, E-)

F <expr> Feedrate at block begin (modal)
E <expr> Feedrate at block end (non-modal)

Notice

The functionality "Feedrate at block end" is not yet implemented.

In the interpolation types G01, G02, G03, G100, G105, the programmed axes are traversed with the path speed declared in the F-word. (preset-value in mm/min, m/min, inch/min, mm/s, inch/s, etc. in case of translatory axes or °/min for rotary axis, depending upon the configuration). The F-word is modal.

Values can be assigned to the F-word either directly or for each parameter, whereby also decimal numbers are permitted (REAL64-format).

With the user-command "G93" it is also possible to specify a machining-time instead of a feed rate by the F-Word. A description of this can be found in para. "G-Functions".

Programming example

N10 F1000 G01 X200 G90 (Feedrate 1000 mm/min)
N20 X300
N30 X350 F800 (Lowering of feed velocity)
(from 1000 to 800 mm/min)
Velocities (F-, E-) 1:
Fig. 6.1: Feed programming using F-words