Siemens SINUMERIK 840Di sl Programming Manual page 274

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Feedrate Control and Spindle Motion

7.1 Feedrate (G93, G94, G95 or F..., FGROUP, FGREF)

The FGREF evaluation also works if only rotary axes are programmed in the block. The

normal F value interpretation as degree/min applies in this case only if the radius reference

corresponds to the FGREF default, when

G71/G710: FGREF[A]=57.296

G70/G700: FGREF[A]=57.296/25.4

Units of measurement and calculation

Machine manufacturer

See machine manufacturer's specifications.

Units of measurement for feedrate F

You can use the following G commands to define the units of measurement for the feed

input. Feedrate functions are not affected by G70/G71.

With G700/G710, feedrate values F are interpreted as geometrical parameters in the

measuring system set by G function (G700: [inch/min]; G710: [mm/min]).

Feedrate G93

Unit 1/rpm. The inverse-time feedrate specifies the time required to execute the motion

commands in a block.

Example: N10 G93 G01 X100 F2 means: the programmed path is traversed in 0.5 min.

Programming Manual, 11/2006, 6FC5398-1BP10-2BA0

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