# Velocities (F/E)

Syntax:
F.. | Feedrate in the block | modal
E.. | 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

- in [mm/min, m/min, inch/min] for translatory axes
- in [°/min] for rotary axes.

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

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

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

## Programing 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

## Programing 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

## Programing Example

N10 G01 G94 G90 G261

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

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