Velocities (F-, E-)

F <expr>                                     Feedrate within the block                                   (modal)

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

With interpolation modes G1, G2, G3 or for G100, the programmed paths are traversed at the path velocity agreed in the F word. The F and E words are specified

The F word is modal. Programming in mm/min or m/min can be configured with the channel parameter P-CHAN-00108.

The command G93 can also specify a machining time by the F word instead of a path velocity. The description in contained in the Section "G functions".

The path velocity at block end is programmed by the E word. The value is block-specific, i.e. non-modal. If the E word is not specified or the programmed value is greater than the F word, the E word is assigned the value of the F word

Notice

notice

The E word is only effective in combination with G94.

Due to active contour-changing functions such as G301, G302, G41, G42, G261, #HSC [OPMODE 1…], inserted contour elements adopt the E feedrate of the main blocks as the new F feedrate.

For all other spline and HSC functions, it is recommended to avoid the use of the E feedrate.

Values can be assigned to the F and E words either directly or for each parameter. In this case, decimal numbers are also permitted (REAL format).

Notice

notice

The PLC can also specify path feed externally and also weight it with the NC command #FF.

Programing Example

prg_example

Velocities (F-, E-)

N10 X200 G01 F1000 G90     ;F feedrate 1000 mm/min

N20 X300

N30 X350 F800              ;Lower F feedrate from 1000 to 800 mm/min

Program feedrate using F word
Program feedrate using F word

Programing Example

prg_example

N05 G01 G94 G90

N10 X200 F1000 E500      ;(F feedrate 1000 mm/min, E feedrate 500 mm/min

N20 X250 E400            ;F feedrate 1000 mm/min, E feedrate 400 mm/min

N30 X350 F800 E300       ;F feedrate 800 mm/min, E feedrate 300mm/min

X400 E500                 ;F feedrate 800 mm/min, E feedrate 800mm/min

Program feedrate using F and E words
Program feedrate using F and E words

Programing Example

prg_example

N10 G01 G94 G90 G261

N20 X100 F1000 E200      ;(F feedrate 1000 mm/min, E feedrate 200mm/min

N30 Y100 E200            ;F feedrate 1000 mm/min, E feedrate 200mm/min

N40 X0                   ;F feedrate 1000 mm/min

N50 Y0 E200            ;F feedrate 1000 mm/min, E feedrate 200mm/min

N60 X50

N70 G260

Effect of E word on inserted contour elements (here G261)
Effect of E word on inserted contour elements (here G261)