PROGRAMMING5. FEED FUNCTIONS
Feedrate of linear interpolation (G01), circular interpolation (G02, G03),
etc. are commanded with numbers after the F code.
In machining feed, 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
After F, specify the amount of feed of the tool per minute.
2. One–digit F code feed
Specify a desired one–digit number after F. Then, the feedrate set with
the CNC for that number is set.
Feed per minute
F_ ; Feedrate command (mm/min or inch/min)
One–digit F code feed
N : Number from 1 to 9
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)
Amount of feed of the nozzle 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
Fig.5.3 (b) Feed per minute
D Tangential speed
D Feed per minute