(Common to Power Mate i–D and –H)
5. FEED FUNCTIONS
Feedrate of linear interpolation (G01), etc. are commanded with numbers
after the F code.
In cutting feed (Circular interpolation (G02, G03)), the next block is
executed so that the feedrate change from the previous block is minimized.
Two modes of specification are available:
1. Feed per minute (G94)
After F, specify the amount of feed of the tool per minute.
2. Feed per revolution (G95)
After F, specify the amount of feed of the tool per position coder
Feed per minute
G94 ; G code (group 05) for feed per minute
F_ ; Feedrate command (mm/min or inch/min)
Feed per revolution
G95 ; G code (group 05) for feed per revolution
F_ ; Feedrate command (mm/rev or inch/rev)
Cutting feed is controlled so that the tangential feedrate is always set at
a specified feedrate.
Center End point
Fig.5.3 (a) Tangential feedrate (F)
After specifying G94 (in the feed per minute mode), the amount of feed of
the tool per minute is to be directly specified by setting a number after F.
G94 is a modal code. Once a G94 is specified, it is valid until G93 (rate
function) or G95 (feed per revolution) is specified. At power–on, the feed
per minute mode is set.
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
Feed per minute (G94)