5. FEED FUNCTIONS
Feedrate of linear interpolation (G01), circular interpolation (G02, G03),
etc. are commanded with numbers after the F code.
In cutting feed, the next block is executed so that the feedrate change from
the previous block is minimized.
Feed per minute
F_ ; Feedrate command (mm/min or inch/min)
Cutting feed is controlled so that the tangential feedrate is always set at
a specified feedrate.
Fig. 5.3 (a) Tangential feedrate (F)
The amount of feed of the tool per minute is to be directly specified by
setting a number after F.
An override from 0% to 254% (in 1% steps) can be applied to feed per
minute with the switch on the machine operator’s panel. For detailed
information, see the appropriate manual of the machine tool builder.
Feed amount per minute
(mm/min or inch/min)
Fig. 5.3 (b) Feed per minute
Cutting feed is invalid for the turret axis (T–axis) and C–axis.
T–axis and C–axis commands, therefore, cannot be
specified in linear interpolation (G01) mode and circular
interpolation (G02, G03) mode.
However, when the parameter CIP (No.16360#5) is set to
1, C–axis can be specified.
D Tangential speed
D Feed per minute